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1. Top results related to what are the function of dictionary in javascript

   • What is the function of the the double parentNode in Javascript?

     Top Answer

     Answered Jun 26, 2021 · 0 votes

     element.parentNode => parentNode 2 element.parentNode.parentNode => parentNode 1

     element.parentNode.parentNode.removeChild => [parentNode 1].renoveChild //pseudo code

     element.parentNode.parentNode.removeChild(element.parentNode) => [parentNode 1].renoveChild([parentNode 2]) //pseudo code

     So parentNode 2 will be removed along with all it's children

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     1/5

   • What are all the differences between function and constructor function in JavaScript?

     Top Answer

     Answered Aug 23, 2017 · 54 votes

     A constructor function is a normal function.

     What makes the difference here is the use of the new operator which makes the context (this) in the function the new instance, thus letting it take the two properties, and returns this new instance.

     Without the new operator, the context would have been the external one (window if your code is in the global scope in loose mode, undefined if in strict mode).

     That is, if you omit the new

     var catC = Cat("Fluffy", "White");-

     the function "works" (if you're not in strict mode) but you have two different results :

     • catC is undefined as your function returns nothing
     • name and color are now properties of the external scope

     The whole magic, thus, is in the new operator :

     When the code new foo(...) is executed, the following things happen:

     A new object is created, inheriting from foo.prototype.

     The constructor function foo is called with the specified arguments and this bound to the newly created object. new foo is equivalent to new foo(), i.e. if no argument list is specified, foo is called without arguments.

     The object returned by the constructor function becomes the result of the whole new expression. If the constructor function doesn't explicitly return an object, the object created in step 1 is used instead. (Normally constructors don't return a value, but they can choose to do so if they want to override the normal object creation process.)

     When I said it's a normal function I, I omitted one thing : the intent of the developer. You usually define functions to be either called as constructors (i.e. with new) or not. In the first case you most often use the arguments to initialize the fields of the instance (using this.name = ...) and you often follow by adding functions to the prototype (as you did) so that they become available for all instances. And to make your intent clear, it's customary to name your constructor starting with an uppercase letter.

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     2/5

   • What are the benefits and drawbacks of using the 'this' keyword in a constructor function over the prototype property?

     Top Answer

     Answered May 23, 2017 · 2 votes

     I'm wondering if this is the correct way of imagining what's taking place

     Yes.

     Why would anyone choose one method over another?

     • values are shared amongst all instances
     • therefore takes less memory and is faster: Defining methods via prototype vs using this in the constructor - really a performance difference?

     This is especially beneficial for methods (with their dynamic this binding)

     • values are specific to each instance
     • methods defined there are closure which have access to the constructor scope and therefore allows true privacy.

     The own properties are necessary for the data that distinguishes the instances.

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     3/5

   • What are the types of Popup box available in JavaScript ?

     In Javascript, popup boxes are used to display the message or notification to the user.

     There are three types of pop-up boxes in JavaScript:

     Table of Content

     • Alert Box
     • Prompt Box
     • Confirm Box

     Alert Box

     It is used when a warning message is needed to be produced. When the alert box is displayed to the user, the user needs to press ok and proceed.

     alert("your Alert here");

     Example: This example shows the implementation of the alert box.

     HTML

     <!DOCTYPE html><html><head>    <title>Pop-up Box type | Alert Box</title>    <style>        h1{            color:green;        }    </style></head> <body>    <center>        <h1>GeeksforGeeks</h1>         <h3>Alert Box</h3>        <button onclick="geekAlert()">            Click here for alert box        </button>                 <!-- Alert box function -->        <script>            function geekAlert() {                alert("An Online Computer Science"                            + "Portal for Geeks");            }        </script>    </center> </body></html>-

     Output: 

     Output

     Prompt Box...

     Check all answers on Geeksforgeeks

     4/5

   • What are the Equivalent of printf/String.Format in JavaScript ?

     JavaScript is a popular programming language that is used to create interactive and dynamic web pages. When working with JavaScript, developers often need to format strings to display data in a specific way. The printf function and the String.Format() methods are two popular string formatting tools in other programming languages, but JavaScript does not have a built-in equivalent. However, there are several approaches to achieving the same functionality in JavaScript.

     Approaches: To use printf or String.Format in other programming languages, you need to include the necessary library or module. However, JavaScript doesn’t have a built-in function that is equivalent to printf or String.Format. There are several approaches to achieving printf or String.Format functionality in JavaScript. Here are some approaches you can use:

     1. Using console.log() Method: JavaScript provides the console.log() method for printing the value of variables and expressions to the console. This method is often used for debugging and testing purposes, but it can also be used for printing strings and integers in a specific format, similar to the printf() function in other programming languages.

      

     Syntax:

     console.log()

     Example:

     Javascript

     const name = 'Geek'; const age 14...

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     5/5

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2. People also ask

   What is a JavaScript function?

   • JavaScript is a zero-index language. An indefinite number of parameters can be passed to a function. The function can access them through formal parameters and also through the local arguments object. Variadic functions can also be created by using the bind method.

   JavaScript - Wikipedia

   en.wikipedia.org/wiki/JavaScript

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   Is JavaScript a JavaScript language?

   • JavaScript is a high-level, often just-in-time compiled language that conforms to the ECMAScript standard. It has dynamic typing, prototype-based object-orientation, and first-class functions. It is multi-paradigm, supporting event-driven, functional, and imperative programming styles.

   JavaScript - Wikipedia

   en.wikipedia.org/wiki/JavaScript

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   What is JavaScript used for?

   • JavaScript is primarily used for enhancing web pages by adding interactivity, dynamic content, and user-friendly features. It runs directly in web browsers and allows developers to create responsive and engaging user interfaces. How do I learn JavaScript from scratch? To learn JavaScript from scratch, start with the basics:

   JavaScript Tutorial - GeeksforGeeks

   www.geeksforgeeks.org/javascript/

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   What is a JavaScript tutorial?

   • this javascript tutorial covers all important advanced JavaScript concepts such as functional programming, object-oriented programming, asynchronous programming, and more. Beginners can start with the basics and gradually delve into more advanced concepts as they progress through the tutorial.

   JavaScript Tutorial - GeeksforGeeks

   www.geeksforgeeks.org/javascript/

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3. www.geeksforgeeks.org › javascriptJavaScript Tutorial - GeeksforGeeks

   www.geeksforgeeks.org › javascript

   • Cached

   3 days ago · JavaScript Tutorial. JavaScript is the most powerful and versatile programming language used in the web. It is a lightweight, cross-platform, single-threaded and interpreted programming language. It is a commonly used programming language to create dynamic and interactive elements in web applications. It is easy to learn, compiled language.

4. metana.io › blog › functions-in-javascript-functionsFunctions in JavaScript - Metana

   metana.io › blog › functions-in-javascript-functions

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   1 day ago · When the function is called with specific values for length and width (arguments), it executes the defined logic and returns the result. Breaking Down JavaScript Functions. A JavaScript function definition comprises several key elements: Function Keyword (function): This keyword signifies the beginning of a function definition.

5. www.bitcatcha.com › blog › what-is-javascriptWhat Is JavaScript? A Basic Guide to JS For Beginners - Bitcatcha

   www.bitcatcha.com › blog › what-is-javascript

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   3 days ago · JavaScript is an object-oriented programming (OOP) scripting language. On the other hand, Java is an OOP programming language. JavaScript code runs only on a browser, while Java creates applications that can be run on a browser or virtual machine. JavaScript code is all in text, whereas Java code needs to be compiled.

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6. Videos

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     6:46

     youtube.com

     How To Create A Dictionary Data Structure In JavaScript

     Jun 26, 2016

     17.2K Views

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     0:56

     youtube.com

     JavaScript - How To Create A Dictionary And Add Key Value Pairs Dynamically

     Jul 20, 2021

     2.4K Views

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     58:56

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     How to Build a Dictionary App in JavaScript

     Apr 23, 2023

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7. www.edureka.co › blog › advanced-javascript-tutorialAdvanced JavaScript Tutorial | Best Guide to ... - Edureka

   www.edureka.co › blog › advanced-javascript-tutorial

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   Oct 5, 2023 · In this Advanced JavaScript Tutorial, we will learn about some of the advanced aspects of the programming language in the following sequence: Overview of JavaScript; Advanced Working with Functions; JavaScript Namespaces; Prototypes; Error Handling; Modules in JavaScript; Chaining JavaScript Methods; Generators . Overview of JavaScript

   • End Date: November 19, 2023

   • Start Date: October 21, 2023

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8. en.wikipedia.org › wiki › JavaScriptJavaScript - Wikipedia

   en.wikipedia.org › wiki › JavaScript

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   23 hours ago · JavaScript. JavaScript ( / ˈdʒɑːvəskrɪpt / ), often abbreviated as JS, is a programming language and core technology of the Web, alongside HTML and CSS. 99% of websites use JavaScript on the client side for webpage behavior. [10] Web browsers have a dedicated JavaScript engine that executes the client code.

   • First appeared: December 4, 1995; 27 years ago

   • Stable release: ECMAScript 2021, / June 2021; 2 years ago

9. www.educative.io › blog › understanding-javascript-thisUnderstanding “this” in JavaScript - Educative

   www.educative.io › blog › understanding-javascript-this

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   1 day ago · In many programming languages like C++ or Java, the concept of this is often associated with object-oriented programming (OOP) paradigms. When you refer to this within a method or function in these languages, it typically points to the current instance of the class or object on which the method is being invoked. However, in JavaScript, the behavior of this differs significantly as its ...

10. gist.github.com › g023 › 20144fb6f443b7538db69eMaking dictionaries with Javascript · GitHub

    gist.github.com › g023 › 20144fb6f443b7538db69e

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    5 days ago · This function takes a string text as input and returns an array of objects containing the two-character combinations and their respective counts, ordered by frequency from most used to least used. Making dictionaries with Javascript. GitHub Gist: instantly share code, notes, and snippets.