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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. stackoverflow.com › questions › 78414308dictionary - In JavaScript, what is the difference between a ...

   stackoverflow.com › questions › 78414308

   • Cached

   May 1, 2024 · There is the array method aka Array.map () which is basically (I know this is an over simplification) a fancy iterator. I can easily do anything I would with map or filter with a for...loop, it would generally just take more lines of code. Whereas a Map is similar to a Set. I think Map is more for objects, and it comes with its own crud operations.

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

   www.geeksforgeeks.org › javascript

   • Cached

   2 days ago · JavaScript Tutorial. JavaScript is the most powerful and versatile web programming language. It is used for making the websites interactive. JavaScript helps us add features like animations, interactive forms and dynamic content to web pages. In this JavaScript Tutorial, we’ll learn all the basics to advanced topics and concepts of JavaScript.

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   What is JavaScript used for?

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   JavaScript Tutorial - GeeksforGeeks

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   Is JavaScript a programming language?

   • JavaScript is a simple and easy-to-learn programming language as compared to other languages such as C++, Ruby, and Python. It is a high-level, interpreted language that can easily be embedded with languages like HTML. It was developed by Netscape Communications Corporation, Mozilla Foundation, and ECMA International.

   Learn JavaScript: Tutorials for Beginners, Intermediate and ... - Stackify

   stackify.com/learn-javascript-tutorials/

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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

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   What is JavaScript com?

   • JavaScript.com is a new, free and online JavaScript tutorial that offers courses in an interactive manner. This tutorial is created by the Pluralsight team in order to facilitate and provide classes on JavaScript language to its readers. This tutorial is designed especially for beginners who want to get up and run along with JavaScript.

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5. stackoverflow.com › questions › 78367184javascript - How to use a variable to find data in a ...

   stackoverflow.com › questions › 78367184

   • Cached

   Apr 22, 2024 · I have a dictionary and I want to access different parts of the dictionary based on the output of a random generator. Since I do not know what the output would be of the random generator I want to use the name of the variable generated to access the dictionary. So here is my dictionary:

6. www.reddit.com › r › javascriptJavaScript Basics: How to create a Dictionary with Key/Value ...

   www.reddit.com › r › javascript

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   JavaScript Basics: How to create a Dictionary with Key/Value pairs. For large or frequently updated dictionaries it's better to use Map / Set if you care about performance. Plain objects are bad for the mentioned use case because updating an object creates new shape which is expensive.

7. Videos

   • 

     6:46

     youtube.com

     How To Create A Dictionary Data Structure In JavaScript

     Jun 26, 2016

     16.8K Views

   • 

     0:56

     youtube.com

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

     Jul 20, 2021

     2.5K Views

   • 

     58:56

     youtube.com

     How to Build a Dictionary App in JavaScript

     Apr 23, 2023

     9.7K Views

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8. www.onexception.dev › news › 1218771Understanding Dictionary.get() Method in JavaScript for ...

   www.onexception.dev › news › 1218771

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   Apr 15, 2024 · Abstract: In this article, we will explore how to use the Dictionary.get() method in JavaScript to access values in nested objects. We will cover the basics of the method, provide examples, and discuss best practices.

9. stackify.com › learn-javascript-tutorialsLearn JavaScript: Tutorials for all programmers- Stackify

   stackify.com › learn-javascript-tutorials

   • Cached

   Apr 23, 2024 · JavaScript is a simple and easy-to-learn programming language as compared to other languages such as C++, Ruby, and Python. It is a high-level, interpreted language that can easily be embedded with languages like HTML. It was developed by Netscape Communications Corporation, Mozilla Foundation, and ECMA International.

10. 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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    Apr 15, 2024 · 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.