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Tarik Senior Mobile Developer, Bosnia and Herzegovina
$25 /hr
8 Years Exp.
0 Followers
✓ MOBILE APP DEVELOPER - HAVING 7+ YEARS OF EXPERIENCE I am always asking to my customers, "Are you 100% satisfied with my work? If not, ple...Read More
Harinder Chouhan Web and mobile application development, India
$5 /hr
3 Years Exp.
0 Followers
I am a Php developer from last 3 years I have a hub of knowledge about Php. So please give me a chance to prove my skills with your project Thank y...Read More
Harshita V.Sr. Web||App Developer , India
$8 /hr
12 Years Exp.
0 Followers
I am Professional Web and App Developers having 12 years of experience in Website Design and Development in PHP, Core PHP, Codeigniter,CMS, Wordpress,...Read More
Damanpreet Singh Mobile App Developer, India
$3 /hr
8 Years Exp.
0 Followers
As a developer i am skilled with working as a team as well as alone and creating inputs into projects. I have a good record of success in creating pro...Read More
Sabarish J.software Engineer, India
$0 /hr
5 Years Exp.
0 Followers
I am having 4.5+ years in mobile application development. I had self learned Cross Platform like Phonegap , Hybrid application and iOS (Swift) . I�...Read More
Dhiraj K.Web Development, India
$70 /hr
6 Years Exp.
0 Followers
I having 6 years experience With AJAX, Javascript, Jquery, Html5, CSS3, PHP, CakePHP, C#, Android App Development, PhoneGap. ETC.
PHP | Wordpress | Shopify | Magento | SEO | Mobile App I have Expertise in Website, Mobile APP, CMS, ERP, SEO, SMO and Fastest Growing in the worl...Read More
Tarun U.Web Developer, India
$17 /hr
0 Years Exp.
0 Followers
I am an experienced Web Developer with interest in building responsive and interactive web applications with upgraded technologies. I have 4+ years of...Read More
Programs I work with: Word-press, Shopify, Codeigniter, HTML/CSS, Responsive Designs, Adobe Illustrator, Photoshop, Google Analytic's. Experie...Read More
I have good experience in understanding clients/customers business requirements, scope finalization and preparing a proposal. I believe the success of...Read More
An experienced Full-stack and Hybrid mobile app developer working in Agile fashion to design and deliver quality software applications. •Ability...Read More
Hi There!! Thanks for reviewing our profile. We @ kennedia IT Solutions () believe in adding value for its customers by providing the best environm...Read More
Dibyendu Biswas B.Web and Mobile Application Developer, India
$22 /hr
9 Years Exp.
0 Followers
I am a certified mobile application and website developer. I have been working in this domain for 9 years. I have started my own company - Websofttech...Read More
Shajahan Basha S.PHP & Hybrid App Developer, India
$15 /hr
5 Years Exp.
0 Followers
I am an experienced Web & Hybrid App Developer from Hyderabad. I have completely 4+ years of professional experience in web development. Apart fr...Read More
Bhavin Business Analyst, India
$16 /hr
8 Years Exp.
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Being a Business Analyst, my core responsibility toward my job is to get understanding of the client's requirement and pass it to the technical t...Read More
NicheTech Solutions Pvt. Ltd (www.NicheTech.in ) means “Niche in Technology”. We are focused on Niche Technology for your business solutions. We have...Read More
Nicky P.Senior developer and architect, Israel
$52 /hr
20 Years Exp.
0 Followers
Many years of experience in many software environments. Will find the solution. Always. I see the big picture, since I had in the past my own ventur...Read More
Meeran T.Mobile Application Developer, Pakistan
$10 /hr
2 Years Exp.
0 Followers
Passionate and self-motivated mobile application developer. I'm a graduate of software engineering with expertise in native Android, iOS and Hybr...Read More
Saurabh Naik Project Manager , India
$10 /hr
11 Years Exp.
0 Followers
Hello Toogit Community, I'm Saurabh Naik, representing Crest Infosystems Pvt Ltd as a Project Manage...Read More
Bariza Web and Mobile App & Digital Marketing Solution, India
$10 /hr
0 Years Exp.
4 Followers
Bariza Software Solutions LLP is a leading web design firm dedicated in delivering world class web solutions for small businesses, big brands & la...Read More
Abdullah H.Sr Web developer, India
$3 /hr
5 Years Exp.
0 Followers
Sr web developer having more rthan 5 years of working experience in PHP/MYSQL, C#.NET, HTML, CSS, JS .BOOTSTRAP, AJAX etc.
Sheju R.business development manager, India
$0 /hr
0 Years Exp.
0 Followers
Am Sheju business development manager from Nohitatu technologies PVT.LTD. We are expert in web and mobile app development works , kindly go...Read More
Edward K.Software Developer, United States
$1 /hr
0 Years Exp.
0 Followers
Technologist and full stack software developer with over 8 years of experience.
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Articles Related To Phonegap


As you know, JavaScript is the top programming language in the world, the language of the web, of mobile hybrid apps (like PhoneGap or Appcelerator), of the server side (like NodeJS or Wakanda) and has many other implementations. It’s also the starting point for many new developers to the world of programming, as it can be used to display a simple alert in the web browser but also to control a robot (using nodebot, or nodruino). The developers who master JavaScript and write organized and performant code have become the most sought after in the job market.

 

In this article, I’ll share a set of JavaScript tips, tricks and best practices that should be known by all JavaScript developers regardless of their browser/engine or the SSJS (Server Side JavaScript) interpreter.

 

Don’t forget var” keyword when assigning a variable’s value for the first time.

Assignment to an undeclared variable automatically results in a global variable being created. Avoid global variables.

Use “===” instead of “==”

The == (or !=) operator performs an automatic type conversion if needed. The === (or !==) operator will not perform any conversion. It compares the value and the type, which could be considered faster than ==

[10] === 10    // is false

[10]  == 10    // is true

'10' == 10     // is true

'10' === 10    // is false

 []   == 0     // is true

 [] ===  0     // is false

 '' == false   // is true but true == "a" is false

 '' ===   false // is false 

undefined, null, 0, false, NaN, '' (empty string) are all falsy.

 

Use Semicolons for line termination

The use of semi-colons for line termination is a good practice. You won’t be warned if you forget it, because in most cases it will be inserted by the JavaScript parser. For more details about why you should use semi-colons.

 

Create an object constructor

function Person(firstName, lastName){

    this.firstName =  firstName;

    this.lastName = lastName;        

}  

var Khalid = new Person("Khalid", "Ansari");

 

Be careful when using typeof, instanceof and constructor.

typeof: a JavaScript unary operator used to return a string that represents the primitive type of a variable, don’t forget that typeof null will return “object”, and for the majority of object types (Array, Date, and others) will return also “object”.

constructor: is a property of the internal prototype property, which could be overridden by code.

 

instanceof: is another JavaScript operator that check in all the prototypes chain the constructor it returns true if it’s found and false if not.

 

var arr = ["a", "b", "c"];

typeof arr;   // return "object" 

arr  instanceof Array // true

arr.constructor();  //[]

 

Define a Self-calling Function

This is often called a Self-Invoked Anonymous Function or Immediately Invoked Function Expression (IIFE). It is a function that executes automatically when you create it, If you want to use this function you can write in the following way: 

 

(function(){

    // some private code that will be executed automatically

})();  

(function(p,q){

    var r = p+q;

    return r;

})(40,50);

 

Get a random item from an array

var items_array = [12, 548 , 'a' , 2 , 5478 , 'toogit' , 8852, , 'freelance' , 2145 , 119];

var  randomItem = items[Math.floor(Math.random() * items.length)];

 

Get a random number in a specific range

This code snippet can be useful when trying to generate fake data for testing purposes, such as a salary between min and max.

var x = Math.floor(Math.random() * (max - min + 1)) + min;

 

Generate an array of numbers with numbers from 0 to max

var numbersArray = [] , max = 100;

for( var i=1; numbersArray.push(i++) < max;);  // numbers = [1,2,3 ... 100] 

 

Generate a random set of alphanumeric characters

function generateRandomAlphaNum(len) {

    var rdmString = "";

    for( ; rdmString.length < len; rdmString  += Math.random().toString(36).substr(2));

    return  rdmString.substr(0, len);

}

 

Shuffle an array of numbers

var numbers = [5, 458 , 120 , -215 , 228 , 400 , 122205, -85411];

numbers = numbers.sort(function(){ return Math.random() - 0.5});

 

A better option could be to implement a random sort order by code (e.g. : Fisher-Yates shuffle), than using the native sort JavaScript function

 

A string trim function

The classic trim function of Java, C#, PHP and many other language that remove whitespace from a string doesn’t exist in JavaScript, so we could add it to the String object.

String.prototype.trim = function(){return this.replace(/^s+|s+$/g, "");};  

A native implementation of the trim() function is available in the recent JavaScript engines.

 

Append an array to another array

var array1 = [12 , "foo" , {name "Joe"} , -2458];

var array2 = ["Doe" , 555 , 100];

Array.prototype.push.apply(array1, array2);

 

Transform the arguments object into an array

var argArray = Array.prototype.slice.call(arguments);

 

Verify that a given argument is a number

function isNumber(n){

    return !isNaN(parseFloat(n)) && isFinite(n);

}

 

Verify that a given argument is an array

function isArray(obj){

    return Object.prototype.toString.call(obj) === '[object Array]' ;

}

Note that if the toString() method is overridden, you will not get the expected result using this trick.

Or Use..

Array.isArray(obj); // its a new Array method

You could also use instanceofif you are not working with multiple frames. However, if you have many contexts, you will get a wrong result.

var myFrame = document.createElement('iframe');

document.body.appendChild(myFrame);

var myArray = window.frames[window.frames.length-1].Array;

var arr = new myArray(a,b,10); // [a,b,10]  

// instanceof will not work correctly, myArray loses his constructor 

// constructor is not shared between frames

arr instanceof Array; // false

 

Get the max or the min in an array of numbers

var  numbers = [5, 458 , 120 , -215 , 228 , 400 , 122205, -85411]; 

var maxInNumbers = Math.max.apply(Math, numbers); 

var minInNumbers = Math.min.apply(Math, numbers);

 

Empty an array

var myArray = [12 , 222 , 1000 ];  

myArray.length = 0; // myArray will be equal to [].

 

Don’t use delete to remove an item from array

Use splice instead of using delete to delete an item from an array. Using delete replaces the item with undefined instead of the removing it from the array.

Instead of…

var items = [12, 548 ,'a' , 2 , 5478 , 'foo' , 8852, , 'Doe' ,2154 , 119 ]; 

items.length; // return 11 

delete items[3]; // return true 

items.length; // return 11 

Use

var items = [12, 548 ,'a' , 2 , 5478 , 'foo' , 8852, , 'Doe' ,2154 , 119 ]; 

items.length; // return 11 

items.splice(3,1) ; 

items.length; // return 10 

 

Clearing or truncating an array

An easy way of clearing or truncating an array without reassigning it is by changing its length property value:

const arr = [11,22,33,44,55,66];

// truncanting

arr.length = 3;

console.log(arr); //=> [11, 22, 33]

// clearing

arr.length = 0;

console.log(arr); //=> []

console.log(arr[2]); //=> undefined

 

Simulating named parameters with object destructuring

Chances are high that you’re already using configuration objects when you need to pass a variable set of options to some function, like this:

doSomething({ foo: 'Hello', bar: 'Toogit!', baz: 42 });

function doSomething(config) {  

const foo = config.foo !== undefined ? config.foo : 'Hi';  const bar = config.bar !== undefined ? config.bar : 'Me!';  const baz = config.baz !== undefined ? config.baz : 13;  // ...

}

This is an old but effective pattern, which tries to simulate named parameters in JavaScript. The function calling looks fine. On the other hand, the config object handling logic is unnecessarily verbose. With ES2015 object destructuring, you can circumvent this downside:

function doSomething({ foo = 'Hello', bar = 'Toogit!', baz = 13 }) {  // ...}

And if you need to make the config object optional, it’s very simple, too:

function doSomething({ foo = 'Hello', bar = 'Toogit!', baz = 13 } = {}) {  // ...}

 

Object destructuring for array items

Assign array items to individual variables with object destructuring:

const csvFileLine = '1997,John Doe,US,john@doe.com,New York';const { 2: country, 4: state } = csvFileLine.split(',');

 

 

What is the difference between Java and JavaScript?

 

These are two different programming languages.

 

Javascript is a language that has gained tremendous popularity as a language on the web browsers to create dynamic and interactive web pages.

 

Java is a language that has got a similar popularity when you build a “backend” system, which is a fancy word for “almost anything”.

 

Despite the common prefix, they are not related; there creators are different and so are their origin stories (as highlighted by other answers). 

- JavaScript is a genius marketing scam that polluted the world of browsers exceptionally well. The browser reads JavaScript’s code line by line and executes it.

 

- Java is a general purpose language that is used almost everywhere, from Android mobile apps and cryptography to OS and cloud computing. Java’s code is stored in bytecoded format and then gets JIT compiled before the actual execution. In other words, it translates the bytecode to machine code.

 

- Java is class based. JS is prototype based. All objects, like Array or Function inherit from the Object.prototype which remains on top of the chain.

 

- JavaScript uses dynamic type checking (checks the variables while the code executes), unlike Java’s static checking system (variables are verified at compile time), which is more bug free.

 

- The word “Script.” It’s a joke, in case you didn’t get it.

 

 

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