#generate the fibonacci sequence in javascript

[technology1122]

Generate The Fibonacci Sequence In JavaScript

[katejezzz]

LESSON 4

Web design principles are general rules for the design of web-based media that include basic guidelines for the design of layouts and interaction design.

Visual hierarchy in web design refers to the arrangement or presentation of elements in a way that implies importance and influences the order in which the human eye perceives what it sees. ... It's important to note that in web design, visual hierarchy needs to work in conjunction with functionality.

Visual Design Theory & the WebProportion refers the size relationship of visual elements to each other and to the whole. In art this principle has been examined for hundreds of years, and one timeless proportional relationship that occurs frequently for positive effect in design is the Golden mean or Golden ratio.

So, the sequence goes: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, and so on. ... But the Fibonacci sequence doesn't just stop at nature. In graphic design, we refer to it as the Golden Ratio. It can be applied to everything from logo design, print design and website design.

Hick's Law (or the Hick-Hyman Law) states that the more stimuli (or choices) users face, the longer it will take them to make a decision. ... To make our designs work, we need to remember that a) the user's time is precious, and b) a user is not obligated to stay on our site.

Fitts' law states that the amount of time required for a person to move a pointer (e.g., mouse cursor) to a target area is a function of the distance to the target divided by the size of the target. Thus, the longer the distance and the smaller the target's size, the longer it takes.

ACCESSIBILITY- When a visitor enters the website, he or she must be able to access each bit of information in the easiest manner.

Web design takes into consideration a concept called 'Visible language'. According to this concept, visible language is the content people see on the screen and involves three fundamental principles.

In web design terms, it's the space between graphics, columns, images, text, margins and other elements. ... It is also the blank space that reminds us that simpler designs are beautiful and that we don't need to create a layout filled with text and graphical elements to deliver a clear and direct message.

The F-Shaped Pattern. In the F-shaped scanning pattern is characterized by many fixations concentrated at the top and the left side of the page. Specifically: ... Next, users move down the page a bit and then read across in a second horizontal movement that typically covers a shorter area than the previous movement.

Conventional engineering design typically involves the repeated analysis and modification of an initial concept until what is considered to be a satisfactory design emerges. At each stage, the properties of the design are evaluated and compared with the specified requirements.

Test Early and Test Often or 'TETO' is another web design principle that all designers and website owners must consider. Conducting usability tests every now and then provide important results and insights into many kinds of problems and complications related to a website layout or aspects of design.

WYSIWYG (/ˈwɪziwɪɡ/ WIZ-ee-wig), an acronym for What You See Is What You Get, is a system in which editing software allows content to be edited in a form that resembles its appearance when printed or displayed as a finished product, such as a printed document, web page, or slide presentation.

Online technologies - include presentation programs, forms and the file management that are available over the internet

 Cloud computing is the on-demand availability of computer system resources, especially data storage (cloud storage) and computing power, without direct active management by the user. The term is generally used to describe data centers available to many users over the Internet.

PRESENTATION TEMPLATES

Prezi is a Hungarian presentation software company founded in 2009, with offices in Budapest, Berlin, San Francisco, and Riga. As of April 2018, Prezi had more than 100 million users who had created more than 325 million public presentations that have been viewed over 3.5 billion times.

Emaze is a free, online presentation tool that is easy to use and has some beautiful features. You sign in, select one of their amazing templates, create your presentation, and share it. The presentations are created in HTML5 so they are available on any web-enabled device.

mind map is a diagram used to visually organize information. A mind map is hierarchical and shows relationships among pieces of the whole.[1] It is often created around a single concept, drawn as an image in the center of a blank page, to which associated representations of ideas such as images, words and parts of words are added. Major ideas are connected directly to the central concept, and other ideas branch out from those major ideas.

Mind maps can also be drawn by hand, either as "notes" during a lecture, meeting or planning session, for example, or as higher quality pictures when more time is available. Mind maps are considered to be a type of spider diagram.[2] A similar concept in the 1970s was "idea sun bursting".

MIND MAPPING TOOLS

MindMeister is an online mind mapping application that allows its users to visualize, share and present their thoughts via the cloud. MindMeister was launched in 2007 by MeisterLabs GmbH, a software company founded by Michael Hollauf and Till Vollmer.

Sibelius is a scorewriter program developed and released by Sibelius Software Limited. It is the world's largest selling music notation program. Beyond creating, editing and printing music scores, Sibelius can also play the music back using sampled or synthesised sounds.

Google Forms is a survey administration software included as part of the free, web-based Google Docs Editors suite offered by Google. The service also includes Google Docs, Google Sheets, Google Slides, Google Drawings, Google Sites, and Google Keep. Google Forms is only available as a web application.

WEB DESIGN ELEMENT

Normal link- this is the default state of a link(i.e., one that is not being hovered over or clicked or pointed to a URL that the user has already visited).

Visited link - this is link that is not being hovered over or clicked but whose target has been visited by the user.

An active text or graphic link on a Web page. Clicking the link redirects the user to another Web page or a document or image. ... (2) A text or graphic link that redirects the user to a website, document or image that does, in fact, exist. In this context, live link is contrasted with dead link.

When you roll the cursor over a link on a Web page, it is often referred to as "hovering" over the link. For example, the link may become underlined or change color while the cursor is hovering over it. ... The term hovering implies your computer screen is a three-dimensional space.

Label form fields. Labels describe the purpose and function of form elements: for example, the label “month” next to a dropdown menu listing the months of the year, or the label “first name” next to a text input field. Labels are critical because they tell the user what information to provide in the form element.

The <label> element is used to associate a text label with a form <input> field. The label is used to tell users the value that should be entered in the associated input field. 

Form validation is a “technical process where a web-form checks if the information provided by a user is correct.” The form will either alert the user that they messed up and need to fix something to proceed, or the form will be validated and the user will be able to continue with their registration process.

required field is an input field on a form that must have a non-blank value to be valid. Conventionally, many flow action forms mark a required field with an orange asterisk ( ). The image itself is only a label to notify users that the field is required; it does not affect input editing or processing.

real-time validation service will check your subscriber information for you as it is entered, correcting your customers' typos and misspellings. ... An API with real-time validation and correction can quickly correct these errors, ensuring your messages are sent to the right customers with minimal effort on your part.

postback is an HTTP POST to the same page that the form is on. ... This problem was addressed in ASP.NET with the __doPostBack() function and an application model that allows a page to perform validation and processing on its own form data.

STATUS MESSAGES: ERRORS WARNINGS CONFIRMATION,User will usually need some sort of feedback after performing an action on your website. The most likely scenario is after submitting a form, but many other events could occur as well. Carefully consider your website and the action that user might take, and plan for the messages that the website will need to communicate.

tooltip, also known as infotip or hint, is a common graphical user interface element in which, when hovering over a screen element or component, a text box displays information about that element (such as a description of a button's function, or what an abbreviation stands for).

Image sliders (also known as image carousels or slideshows) can be a convenient way to display multiple images, videos, or graphics on your website. The thought of big, beautiful, flashy image shows can be quite alluring. Compelling images can draw new visitors into your site, capturing their attention immediately.

Lightbox is a JavaScript library that displays images and videos by filling the screen, and dimming out the rest of the web page. The original JavaScript library was written by Lokesh Dhakar. The term Lightbox may also refer to other similar JavaScript libraries.

WHAT I’VE LEARNED

In this lesson i learned that there are some designs and layout that are useful for those who needed to design or layout . in this lesson also there are different links that must know and also when you fill up a form in the website like in google forms all of the blanks there should be answered becaused it is needed to be filled up and now i know some of that because of this leeson it is helpful for me and to my classmates.

[nepallyric2-blog]

The Advantages of Javascript Coding Interview Questions and Answers

Netscape designed javaScript. JavaScript is simple to implement because it's integrated with HTML. Over the past few decades, JavaScript has taken over the internet development world getting the language of choice for several developers. https://is.gd/CsK5fg Each of the browsers incorporate support for JavaScript. Then you will find the dialog. Some of the typical interview questions are illegal. Interview questions in this manner will catch you in the event that you don't. Standard interview questions like this are booby-trapped. These answers are for work which needs time-saving and communicating skills. So, that said, if your question is not on this list, it is likely because it's a question I would save for some interview. This query has the capability to spawn a fantastic conversation. It's an open ended question with no right answer that is particular. It should tell you something in the process. Bear in mind, undefined is not a key word. As an example, if you're comparing two strings, they need to have character collections that are identical. There is A Python documentation series called docstring, it is a way of documenting courses, modules and Python functions. The way of implementing iterators are called generators. https://annuaire-du-net.com/javascript-interview-questions-and-answers/ It is possible to use a loop to work out the sequence, or use recursion. If you've set timers, they may wind up interfering with one another. So this, the robot will begin to run within the time. The interviewer would like to listen to, No fashion! The interviewers desire to know whether you'll stick around. Whether you understand the job, he or she wishes to know. It's one of the job interview questions to answer if you find out more about the supplier. Learn about the job before applying. http://bit.ly/2kA8ySD In reality, you are probably going to wind up using both methods. As an example, you are unable to add attributes to it. Life, Death, and Javascript Coding Interview Questions and Replies Be sure your solution is run by that you on your personal computer to ensure it works. So when you can code with google's support in your computer, there are a few concepts which are fantastic to take in mind while you're going to confront a interview. The 2nd only shows you understand how to use a telephone. These 2 objects are not equal, in case the assortment of properties does not match. You will use a easy collection to put the Fibonacci numbers away and simply access the array rather than computing it. You stop this in several of ways. As it's utilised to create role object and return them at 23, A lambda form in python doesn't have statements. All objects but the majority of those can't be copied by you. Objects and behaviors are generally tacked together on the entity, which might be obtained at random by functions with order, which might lead to undesirable behavior like race conditions. It means that we are creating one instance of that class at exactly the time. javascript interview questions That second illustration is not bad. The important concept here is to acquire an idea of the way the candidate designs and maintains code. The notion here is not to experience the queries and look for the response. It's quick and simple to use. For each and every query there will be a few examples and a succinct explanation. Whether Timer2 is simply the next example of a timer the same holds. Otherwise, you may be wasting your own time. In an interview you genuinely don't have enough time to conduct check and also the code that's the method. New Ideas Into Javascript Coding Interview Questions and Replies Never Before Revealed Explain event delegation and the reason it is beneficial. A session enables you to recall information from 1 petition to another. There are a number of browser events which may fire many times inside a timespan such as scrolling down a page or resizing a window. But if you announce walk() method from the Person class, you are going to end up recreating the procedure for each single new example of Person. Because of this, it's considered best practice to have variables declared at the cap of the area they'll be utilized to safeguard against hoisting causing a problem. Interviewers typically start off with two or three conceptual or theoretical questions to make certain you know the fundamentals. Python app runs from the source code. You have to be careful to demonstrate a benefit instead of a reduction. Pythons' benefits are that it's easy and simple, portable, flexible, and build-in data structure and it is an open source. You ought to make the most of it, It is method of type conversion used by Javascript developers. There are a great deal of technical differences between both these varieties of requests, regarding security length limitation, caching and a few others. Therefore, the comparison results true.

[sharemay50-blog]

The Advantages of Replies and Javascript Coding Interview Questions

Netscape created javaScript. Because it is integrated with HTML javaScript is quite easy to implement. Over the development world becoming the terminology of choice for programmers, JavaScript has taken over the last decades. All the modern browsers include support for JavaScript. Then the dialog will be located by you. A number of the interview questions are prohibited. Interview questions this way will catch you at the event you don't. Standard interview questions like this are booby-trapped. These replies are for work that needs time-saving and communicating skills. So, if your favorite question isn't on this list that said, it is likely because it's a question I'd save for a upcoming interview. This query has the capability to spawn a fantastic conversation. It's an open ended question without a particular right answer. It should tell you something in the procedure. Bear in mind, undefined is not a continuous or a keyword. As an example, if you are comparing two strings, they need to have character collections that are identical. A Python documentation string is called docstring, it's a manner of documenting modules functions and courses. The means of implementing iterators are called generators. It is possible to use a loop utilize recursion, or to work out the sequence. https://annuaire-du-net.com/javascript-interview-questions-and-answers/ Therefore, if you've set multiple timers, they might wind up interfering with one another. The robot will begin to run over the specific time. The interviewer would like to listen to, No fashion! Whether you'll stick around the interviewers wish to know. She or he wants to know if you understand the job. It's one of the job interview questions if you learn more about the supplier to answer. Find out about the work before applying. In fact, you are likely going to wind up using both approaches. For instance, you cannot add attributes. https://tinyurl.com/y5bylwsn Life, Death, and Javascript Coding Interview Questions and Replies Be sure your solution is run by that you on your personal computer. So even when you're able to code in your pc with the support of google, there are a few theories that are consistently excellent to take in mind while you're going to face a specialized interview. The 2nd merely shows you know how to use a phone. These two objects are not equal, in case the assortment of properties doesn't match. You will then use an extremely simple collection get into the array rather and simply to put the Fibonacci numbers away. You prevent this in many of means. As it is utilised to create new role object and return them A lambda type in python does not have statements. All objects but most those can't be copied by you. Behaviours and objects are generally tacked on the specific thing, which could be accessed randomly by numerous functions with non-deterministic order, which could lead to behavior like race conditions. It means that we're creating one instance of that class at the time. That second illustration isn't bad. The idea here is to obtain an idea of the way the candidate layouts and maintains code. The notion here is not to go through the queries and search for the answer. It is easy and fast to use. http://bit.ly/2kA8ySD For every question there'll be a succinct explanation and a few examples. The same holds whether Timer2 is just the next instance of a timer. You may be wasting your own time. In an interview you genuinely do not have enough time to run the code and also check that is the quickest method. New Ideas Into Replies and Javascript Coding Interview Questions Never Before Revealed Explain event delegation and the reason it is beneficial. A session essentially lets you recall information from 1 request to another. https://is.gd/CsK5fg There are quite a few browser occasions which may fire several times inside a timespan immediately, like resizing a window or scrolling a page down. Now, if you declare walk() method from the Person class, you'll end up recreating the procedure for every single new illustration of Person. Because of this, it's considered best practice to have variables declared at the area they'll be utilized to safeguard against hoisting causing an issue's cap. To make certain you know the principles, interviewers typically start off with a couple of theoretical or conceptual questions. Python program runs from the source code. You have to be quite cautious to demonstrate a gain instead of just a reduction. The benefits of pythons are that it is easy and easy, portable build-in information structure and it's an open source. You need to make the most of it, It is method of type conversion utilized by Javascript programmers. There are a great deal regarding length limit, security, caching along with a couple others. Consequently, the initial contrast results true.

[rabbitpatio17-blog]

The Benefits of Answers and Javascript Coding Interview Questions

Netscape designed javaScript. Because it's integrated with HTML javaScript is quite simple to implement. Over the last few decades, JavaScript has taken over the development world becoming the terminology of option for new programmers that were several. All the contemporary browsers incorporate built-in support for JavaScript. Then you will locate the warning dialog. A number of the normal interview questions are illegal. Usual interview questions this manner will catch you at the event that you don't. Standard interview questions like this are booby-trapped. https://tinyurl.com/y5bylwsn These answers are for work which needs time-saving and communication abilities. So, if your question isn't on this list that said, it's likely because it's a question I'd save for some interview. This open-ended query has the capacity to spawn a conversation that is great. It is an open ended question with no specific right response. https://is.gd/CsK5fg However, it ought to tell you something in the process. Remember, undefined is not a constant or a key word. For instance, if you're comparing two strings, they need to have character collections that are identical. A Python documentation string is called docstring, it is a manner of assigning modules, Python functions and courses. The means of implementing iterators are called generators. It's possible to use a loop to figure out the sequence, or utilize recursion. Therefore, if you have put multiple timers, they might wind up interfering with one another. The robot will begin to run within the specific time. https://annuaire-du-net.com/javascript-interview-questions-and-answers/ The interviewer would like to hear, No manner! The interviewers desire to understand whether you'll stick around. She or he wishes to know if you understand the job. It is one of the job interview questions if you find out more about the provider to reply. Find out about the work prior to applying. In fact, you are likely going to wind up using both methods. For instance, you cannot add attributes. Life, Death, and Javascript Coding Answers and Interview Questions Just be sure your answer runs on your personal computer to ensure it functions. So when you can code comfortably in your pc with google's support, there are a couple of theories that are fantastic to have in mind while you're likely to confront a interview. The 2nd merely shows you know how to use a phone. In the event the variety of properties doesn't match, these 2 objects aren't equal. You will use a simple collection just and to remove the Fibonacci numbers access the array instead of computing it. You stop this in many of means. As it's utilised to create new role object and return them A lambda type in python doesn't have statements. You can not replicate all objects but most those. Objects and behaviours are tacked together on the entity, which could be accessed at random by numerous functions with order, which might lead to undesirable behaviour like race conditions. It means that we are creating one instance of that class at precisely the time we are declaring it. That second case isn't bad. The concept here is to obtain an notion of the means by which the candidate layouts and maintains code. The notion here is not to go through the questions and search for the response. It's quick and simple to use. http://bit.ly/2kA8ySD For every query and each there'll be a few examples and a succinct explanation. The same holds whether Timer2 is just a timer's example. You might be wasting your time. In an interview you don't have time to run the code and check that is the method. New Ideas Into Answers and Javascript Coding Interview Questions Never Before Revealed Explain event delegation and the reason it is beneficial. A session lets you remember information from 1 petition to another. There are a number of browser occasions that may fire several times within a timespan immediately, such as scrolling down a page or resizing a window. Now, if you declare walk() method in the Person class, you are going to end up recreating the procedure for every single new illustration of Person. Because of this, it is considered best practice to have all variables declared in the cap of this area they'll be utilised to protect against hoisting causing a problem. Interviewers start off with two or three conceptual or theoretical questions to make certain you know the fundamentals. Python app runs right from the source code. You need to be quite careful to demonstrate a benefit instead of only a reduction. The advantages of pythons are that it's easy and easy, portable, flexible, and build-in information structure and it is an open source. You need to make the most of it, It is most frequent process of type conversion. There are a great deal regarding length limit, security, caching and a couple others. Therefore, the very initial contrast results accurate.

[mbaljeetsingh]

20 Excellent Resources for Learning Kotlin

20 Excellent Resources for Learning Kotlin

Danny Markov May 24th, 2017

Кotlin is a modern programming language that runs on the Java Virtual Machine. It has an elegant syntax and is interoperable with all existing Java libraries. In the 2017 Google I/O, the Android team announced that Kotlin will become an official programming language for the Android platform. This puts Kotlin in position to become one of the top programming languages of the future.

To help you get started with your Kotlin journey, we’ve curated a list of some of the best Kotlin learning resources available right now. We haven’t included any paid courses or books, everything on the list is 100% free.

The official website for the project is a very good place to start your Kotlin education. In the reference section you can find in-depth documentation that covers all the main concepts and features of the language. The tutorials section has a variety of practical step-by-step guides on setting up a working environment and working with the compiler.

There is also the Kotlin editor, a browser app that let’s you try out the language. It is loaded with many examples including the Koans course – by far the best way to get familiar with the syntax.

An excellent 11-part series by Juan Ignacio Saravia in which he puts Kotlin into action and builds a Reddit clone app. The tutorials cover a vast number of topics ranging from setting up the workspace to using APIs and even unit testing. The code is available on GitHub.

Antoni Leiva’s blog is dedicated to all things Kotlin. It is updated weekly(ish) with high-quality tutorials and articles in which more advanced Kotlin developers can learn about new libraries and find all kinds of practical techniques.

The official Google blog post that explains the reasons behind the exciting announcement and why Kotlin deserves a place in the Android ecosystem. The article then goes on to give a brief preview of some of the awesome syntax improvements that Kotlin brings.

Dariusz Baciński has created a useful GitHub repo containing common design patterns implemented in Kotlin. There are similar projects written in several languages including Java, Swift, JavaScript, and PHP, so if you are coming from one of these programming background you can use them as a reference point.

A quick cheatsheet with some of the most important features and syntax quirks that will help you write better Kotlin code. There are examples on working with classes, loops, and lists, as well as implementations of classic programming problems such as generating a Fibonacci sequence.

The official blog for Kotlin by its authors at JetBrains. Here you can find all Kotlin related news and updates, as well as all kinds of tutorials, tips, and other useful articles.

A helpful article from the Google Developers blog that explains how to setup Android Studio for Kotlin, how to convert .java files to .kt files, and how to incorporate the new language into an existing Android project. There are also some code comparisons on the same Android APIs used with both Kotlin and Java.

Great article that shows us how to write and run tests for Android apps using Kotlin. The author does a great job of explaining what different types of tests are available, when to use them, and how to make sure we are testing properly. Another good tutorial on this topic can be found here.

A talk from Google I/O 2017 dedicated to introducing Kotlin to people for the first time and giving them an idea of how it can improve their workflow. It covers many of the basics and showcases some cool Kotlin tips.

The second Kotlin talk from Google I/O 2017. This one covers more advanced topics like design patterns, best practices, and other common principles. It also sheds some light on what it is like to use Kotlin in production and the challenges of adopting a young language in the workplace.

Here is a free Kotlin course for complete beginners that includes all the basics from variables to conditionals to loops and functions. It then goes on to more advanced topics like object-orientation in Kotlin and functional programming like lambda expressions.

This talk from 2016 consists of a brief overview of the language’s features followed by a real world example where you’ll learn how Kotlin fits in with the existing tools in a typical Android workflow.

A very good 8-minute tutorial that quickly goes over the most important Kotlin features, such as the shortened variable declarations, lambdas, extension function, and more.

Introduction to Kotlin that explains how the new language will improve the Android ecosystem and shows us a number of cool ways we can use the smart Kotlin syntax to our advantage.

Useful cheatsheet containing short snippets of code that will help you quickly look up the Kotlin alternatives to common Java operators, functions, and declarations.

A plugin for IntelliJ IDEs that allows you to take the Koans course in a local offline environment.

Kotlin has been open-source for more than 5 years and there is a GitHub repo containing the entire history of the project. If you want to support the language there are multiple ways you can contribute, be it directly or by working on the docs.

Template Android project that makes it super easy to setup a stable Kotlin workspace and quickly bootstrap your apps.

An extensive list of Kotlin resources containing all sorts of useful links, books, libraries, frameworks, and videos. The list is very well organized, with a stylized version also available at kotlin.link.

Presenting Bootstrap Studio

a revolutionary tool that developers and designers use to create beautiful interfaces using the Bootstrap Framework.

Learn more

by Danny Markov

Danny is Tutorialzine's Bootstrap and HTML5 expert. When he is not in the office, you can usually find him riding his bike and coding on his laptop in the park.

via Tutorialzine http://ift.tt/2rUt2TZ

[nepallyric2-blog]

The Benefits of Javascript Coding Interview Questions and Answers

Netscape created javaScript. Because it is integrated with HTML, javaScript is simple to implement. https://annuaire-du-net.com/javascript-interview-questions-and-answers/ Over the last few decades, JavaScript has taken over the development globe becoming the language of choice for several new developers. All the modern browsers incorporate support for JavaScript. Then the dialog will be located by you. Some of the most typical interview questions are prohibited. Interview questions in this way will catch you at the event that you don't. Standard interview questions in this way are booby-trapped. These replies are for work which needs communication and time-saving abilities. So, that said, if your favourite question isn't on this list, it is probably because it is a question I would save for some interview. This open-ended question has the capacity to spawn a conversation. It is an open ended question with no particular right answer. It should tell you something in the procedure. Remember, undefined is not a key word. For instance, if you are comparing two strings, then they will need to have identical character sets. A Python documentation string is called docstring, it's a manner of documenting functions, modules and classes. The means of implementing iterators are called generators. It's possible to use a loop use recursion, or to work out the sequence. Consequently, if you've put timers, they may wind up interfering with each other. The robot will start to run within the specific moment. http://bit.ly/2kA8ySD The interviewer would love to hear, No fashion! Whether you'll stick around, the interviewers desire to understand. Whether you understand the job, she or he wants to know. It's among the easiest job interview questions to reply if you learn more about the supplier. Learn about the job prior to applying. In fact, you are likely going to wind up using both methods. As an example, you cannot add attributes. Life, Death, and Javascript Coding Replies and Interview Questions Just make sure your solution runs on your own personal computer. So when you're able to code in your computer with the support of google, there are a few concepts that are consistently fantastic to have in mind as you're going to face a interview. The 2nd only shows you understand how to use a phone. These 2 objects are not equal in case the assortment of possessions does not match. You will then use a collection get into the array instead of computing it and simply to put the Fibonacci numbers away. You stop this in many of ways. As it is utilised to create new role object and return them A lambda type in python doesn't have statements. You can't replicate all objects but most those. Behaviors and objects are generally tacked together on the thing, which might be accessed randomly by numerous functions with non-deterministic sequence, which might lead to undesirable behavior like race conditions. It means that we are creating one instance of that class at the time we're declaring it. That second case isn't bad. The idea here is to acquire an notion of the way the candidate designs and maintains code. The notion here is not to experience the questions and search for the answer. It's fast and simple to use. https://tinyurl.com/y5bylwsn For every query and each there will be a explanation and a few examples. The specific same holds whether Timer2 is simply the next instance of a repeating timer. https://is.gd/CsK5fg Otherwise, you may be wasting your own time. In a meeting you genuinely do not have enough time to run check and the code that is the quickest method. New Ideas Into Javascript Coding Interview Questions and Replies Never Before Revealed Explain why it is beneficial and event delegation. A session lets you remember information. There are quite a few browser events that may fire many times inside a timespan like scrolling a page down or resizing a window. But if you announce walk() method in the Person class, you'll end up recreating the method for each single new illustration of Person. Because of this, it is considered best practice to have variables declared in the cap of the area they will be utilised to safeguard against hoisting. Interviewers typically start off with a couple of conceptual or theoretical questions to make certain you know the fundamentals. Python program runs from the source code. You need to be careful to demonstrate a benefit instead of a loss. The advantages of pythons are that it's simple and simple, portable information structure that is build-in and it is an open source. You need to make the most of it, It is most frequent process of type conversion used by Javascript developers. There are a great deal of differences between both these varieties of asks, regarding length limitation, security, caching and a couple others. Consequently, the very initial contrast results true.

[mbaljeetsingh]

20 Awesome PHP Libraries For Early 2017

This week we have for you a collection of high-quality PHP libraries that have caught our eye in the last couple of months. We’ve tried our best to include projects that are active, well documented, and will have a realistic shot at finding a place in your developer’s workbelt.

If we’ve haven’t included your favorite new library, feel free to share it in the comments :)

Requests for PHP

A no-dependencies library that lets you send HTTP requests. It provides the needed methods for adding headers, accessing response data, handling forms, and everything else you may need, neatly packaged in a clean and easy to use API.

$headers = array('Accept' => 'application/json'); $options = array('auth' => array('user', 'pass')); $request = Requests::get('http://ift.tt/ULh0JY', $headers, $options); var_dump($request->status_code); // int(200) var_dump($request->headers['content-type']); // string(31) "application/json; charset=utf-8" var_dump($request->body); // string(26891) "[...]"

Rinvex Country

Rinvex Country is a PHP package that lets developers retrieve detailed information about the countries of the world. Using the over 50 methods you can get the area of Angola, the currency of Cyprus, the native name of Namibia or even the FIFA name of Finland. There is a ton of info available and the data sources are pretty reliable.

$egypt = country('eg'); $egypt->getCapital(); // Cairo $egypt->getDemonym(); // Egyptian $egypt->getTld(); // .eg $egypt->getContinent(); // Africa $egypt->getSubregion(); // Northern Africa $egypt->getBorders(); // ["ISR","LBY","SDN"]

Botman

A PHP library for developing messenger bots. Works with most of the popular messaging platforms including Facebook Messenger, Slack, Telegram, WeChat, and others. There is also a helpful boilerplate Laravel project available here.

// create an instance $botman = BotManFactory::create($config); // give the bot something to listen for. $botman->hears('hello', function (BotMan $bot) { $bot->reply('Hello yourself.'); }); // start listening $botman->listen();

If you are not familiar with the concept of messenger bots we suggest you check out our article Developer’s Introduction To Chatbots.

Charts

Laravel package for generating highly customizable charts out of datasets. The package works as a PHP wrapper for multiple built-in JavaScript chart libraries, allowing devs to create a wide variety of graphs, gauges and progressbars using only one tool.

$chart = Charts::create('line', 'highcharts') ->view('custom.line.chart.view') ->title('My nice chart') ->labels(['First', 'Second', 'Third']) ->values([5,10,20]) ->dimensions(1000,500) ->responsive(false);

Swap

Swap allows you to retrieve currency exchange rates from a number of services such as Fixer, Google, and Yahoo. Request responses can be easily cached and accessed later. The library is available in the form of a Laravel Package as well.

// Build Swap with Fixer.io $swap = (new Builder()) ->add('fixer') ->build(); // Get the latest EUR/USD rate $rate = $swap->latest('EUR/USD'); // 1.129 $rate->getValue(); // Get the EUR/USD rate 15 days ago $rate = $swap->historical('EUR/USD', (new \DateTime())->modify('-15 days'));

Math PHP

A collection of mathematical functions and algorithms ranging from simple algebra to finances, statistics, numerical analysis and others fields. The library is modular, has a straightforward API, and doesn’t require any external dependencies.

// Factors of an integer $factors = Algebra::factors($n); // Fibonacci sequence $fib = Advanced::fibonacci($n); // Combinations $nCk = Combinatorics::combinations($n, $k); // Likelihood ratios $LL = Experiment::likelihoodRatio($a, $b, $c, $d);

PHPUnit

PHPUnit is an advanced testing framework that enables teams to thoroughly test their code. Unit tests are written in standalone object-oriented classes with the help of many methods for handling assertions, dependencies, etc. A simple CLI is provided for running test and generating reports.

class StackTest extends TestCase { public function testPushAndPop() { $stack = []; $this->assertEquals(0, count($stack)); array_push($stack, 'foo'); $this->assertEquals('foo', $stack[count($stack)-1]); $this->assertEquals(1, count($stack)); $this->assertEquals('foo', array_pop($stack)); $this->assertEquals(0, count($stack)); } }

Atoum

A less popular testing framework we also wanted to share. Atoum offers a one-step installation precess and a relatively simple workflow, while still maintaining a ton of great features. It has a mock engine, expressive assertions, and a CLI that can execute multiple tests in parallel.

$this->given($testedInstance = new testedClass()) ->and($testedClass[] = $firstValue = uniqid()) ->then ->sizeof($testedInstance)->isEqualTo(1) ->string($testedClass[0])->isEqualTo($firstValue);

Simple Regex Language

A PHP implementation of the Simple Regex Language – a verbose way of writing regular expressions. The library provides multiple methods that can be chained together, forming readable and easy to understand RegEx rules. The library has ports for JavaScript and Python as well.

$query = SRL::startsWith() ->anyOf(function (Builder $query) { $query->digit() ->letter() ->oneOf('._%+-'); })->onceOrMore() ->literally('@') ->anyOf(function (Builder $query) { $query->digit() ->letter() ->oneOf('.-'); })->onceOrMore() ->literally('.') ->letter()->atLeast(2) ->mustEnd()->caseInsensitive();

Stash

Stash makes it easy to speed up your code by caching the results of expensive functions or code. Certain actions, like database queries or calls to external APIs, take a lot of time to run but tend to have the same results over short periods of time. This makes it much more efficient to store the results and call them back up later.

$pool = $this->cachePool; // Get a Stash object from the cache pool. $item = $pool->getItem("/user/{$userId}/info"); // Get the data from it, if any happens to be there. $userInfo = $item->get(); // Check to see if the cache missed, which could mean that it either // didn't exist or was stale. if($item->isMiss()) { // Run the relatively expensive code. $userInfo = loadUserInfoFromDatabase($userId); // Set the new value in $item. $item->set($userInfo); // Store the expensive code so the next time it doesn't miss. $pool->save($item) }

PHP VCR

A port of the popular Ruby library for testing HTTP interactions. PHP VCR records HTTP requests and stores them in “cassettes” which can be replayed later on. A set of testing utilities are also provided, making it possible to inspect and compare recordings in detail.

// After turning on, the VCR will intercept all requests \VCR\VCR::turnOn(); // Record requests and responses in cassette file 'example' \VCR\VCR::insertCassette('example'); // Following request will be recorded once and replayed in future test runs $result = file_get_contents('http://example.com'); $this->assertNotEmpty($result); // To stop recording requests, eject the cassette \VCR\VCR::eject(); // Turn off VCR to stop intercepting requests \VCR\VCR::turnOff();

OAuth 2.0 Server

This library allows you to easily configure an OAuth 2.0 server and set up all the authentication levels needed to protect your API. It is fully standards compliant and supports all the grants defined by OAuth protocol. The Laravel Passport module is built on top of the OAuth 2.0 Server.

// Setup the authorization server $server = new \League\OAuth2\Server\AuthorizationServer( $clientRepository, $accessTokenRepository, $scopeRepository, $privateKey, $publicKey ); // Enable a grant on the server $server->enableGrantType( new \League\OAuth2\Server\Grant\ClientCredentialsGrant(), new \DateInterval('PT1H') // access tokens will expire after 1 hour );

Imagine

An image manipulation library that tries to bring together all low level PHP image processing libraries under the same object-oriented API. This allows Imagine to be used for a wide variety of tasks such as drawing, resizing, cropping, filters, effects, metadata editing, and others.

$palette = new Imagine\Image\Palette\RGB(); $image = $imagine->create(new Box(400, 300), $palette->color('#000')); $image->draw() ->ellipse(new Point(200, 150), new Box(300, 225), $image->palette()->color('fff')); $image->save('/path/to/ellipse.png');

MINI

Extremely simple and easy to understand skeleton PHP application, providing only the most essential features every project needs. It does not strive to be a do-it-all framework like Laravel, but due to it’s simplicity MINI can be used for getting smaller apps up and running in no time.

// Working with the model $songs = $this->model->getAllSongs(); $amount_of_songs = $this->model->getAmountOfSongs(); // Loading views require APP . 'views/_templates/header.php'; require APP . 'views/songs/index.php'; require APP . 'views/_templates/footer.php';

AWS SDK

The official PHP library for working with Amazon Web Services. The SDK makes it easy to connect AWS with any PHP project and access all the various available services. There is also a useful Laravel wrapper which can be found here.

// Instantiate an Amazon S3 client. $s3 = new S3Client([ 'version' => 'latest', 'region' => 'us-west-2' ]); $s3->putObject([ 'Bucket' => 'my-bucket', 'Key' => 'my-object', 'Body' => fopen('/path/to/file', 'r'), 'ACL' => 'public-read', ]);

Purl

Lightweight PHP library for working with URLs. With Purl you can compose complex paths attribute by attribute, extract data from URLs, manipulate queries, recognize URLs in strings, and much more.

$url = \Purl\Url::parse('http://jwage.com') ->set('scheme', 'https') ->set('port', '443') ->set('user', 'jwage') ->set('pass', 'password') ->set('path', 'about/me') ->set('query', 'param1=value1&param2=value2'); echo $url->getUrl(); // http://ift.tt/2jKXmzm echo $url->publicSuffix; // com echo $url->registerableDomain; // jwage.com

Daux.io

Documentation generator that uses a simple folder structure and Markdown files to create responsive documentation websites. Daux.io has automatic syntax highlighting, 4 theming options, Bootstrap HTML for easy customization, navigation with readable URLs, and many other goodies.

// Example configuration { "title": "DAUX.IO", "tagline": "The Easiest Way To Document Your Project", "author": "Justin Walsh", "image": "app.png", "html": { "theme": "daux-blue", "breadcrumbs": true, "repo": "justinwalsh/daux.io", "edit_on_github": "justinwalsh/http://ift.tt/2jvDRHq;, "twitter": ["justin_walsh", "todaymade"], "google_analytics": "UA-12653604-10", "links": { "Download": "http://ift.tt/2kjtzyi;, "GitHub Repo": "http://ift.tt/2jvsvmX;, "Made by Todaymade": "http://ift.tt/2kjH0OT; } } }

Dompdf

Dompdf is a PDF generator that takes regular HTML markup and converts it to .pdf files. It understands most CSS rules, which can be fed in-line or via an external stylesheet.

// reference the Dompdf namespace use Dompdf\Dompdf; // instantiate and use the dompdf class $dompdf = new Dompdf(); $dompdf->loadHtml('hello world'); // (Optional) Setup the paper size and orientation $dompdf->setPaper('A4', 'landscape'); // Render the HTML as PDF $dompdf->render(); // Output the generated PDF to Browser $dompdf->stream();

Instaphp

Non-official library for accessing the Instagram API. It provides developers with an easy way to authenticate their app and get access to various Instagram data endpoints including images, users, likes, comments, and tags.

$api = new Instaphp\Instaphp([ 'client_id' => 'your client id', 'client_secret' => 'your client secret', 'redirect_uri' => 'http://ift.tt/2jNPWIY', 'scope' => 'comments+likes' ]); $popular = $api->Media->Popular(['count' => 10]); if (empty($popular->error)) { foreach ($popular->data as $item) { printf('<img src="%s">', $item['images']['low_resolution']['url']); } }

Latitude

Zero-dependencies library for building SQL queries using chainable methods. It supports most query types and works well with MySQL, Postgres, SQL Server, and other databases. There are also built-in escaping helpers for protecting against SQL injection.

$select = SelectQuery::make( 'id', 'username' ) ->from('users'); echo $select->sql(); // SELECT id, username FROM users

via Tutorialzine http://ift.tt/2jL2PX1