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How to Iterate HashMap in Java? - GeeksforGeeks

Details: HashMap is a part of Java’s collection providing the basic implementation of the Map interface of Java by storing the data in (Key, Value) pairs to access them by an index of another type. One object is listed as a key (index) to another object (value). If you try to insert the duplicate key, it will replace the element of the corresponding key.

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How to Think Like a Programmer? - GeeksforGeeks

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How to update NPM ? - GeeksforGeeks

Details: npm update -g. Method 2: Using [email protected] command to update the node package manager. npm install [email protected] -g. Method 3: Using PPA repository (only for Linux). sudo add-apt-repository ppa:chris-lea/node.js sudo apt-get update sudo apt-get install nodejs npm

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How to Sort Pandas DataFrame? - GeeksforGeeks

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How to auto-resize an image to fit a div container using

Details: Output: Note: Using object-fit: cover; will cut off the sides of the image, preserving the aspect ratio, and also filling in space.; Example 3: This example displays an image without using object-fit property. In this example, the size of the image is set manually and the image will not be able to maintain it’s aspect ratio and adjust or resize according to div container on resizing the

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How to send an email from JavaScript ? - GeeksforGeeks

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How to append HTML code to a div using - GeeksforGeeks

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How to sort strings in JavaScript? - GeeksforGeeks

Details: Output: Original String Suraj, Sanjeev, Rajnish, Yash, Ravi After sorting Rajnish, Ravi, Sanjeev, Suraj, Yash Using loop: We will use a simple approach of sorting to sort the strings. In this method, we will use a loop and then compare each element and put the string at its correct position.

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How to style a checkbox using CSS? - GeeksforGeeks

Details: Checkbox is an HTML element which is used to take input from the user. Although it is bit complicated to style it but using Pseudo Elements like :before, :after, :hover and :checked, it is possible to style a checkbox.

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How to create a To-Do list using Drag and Drop in Angular

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How to set alternate table row color using CSS

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How to Run a Python Script - GeeksforGeeks

Details: Python is a well known high-level programming language. The Python script is basically a file containing code written in Python. The file containing python script has the extension ‘.py’ or can also have the extension ‘.pyw’ if it is being run on a windows machine.To run a python script, we need a python interpreter that needs to be downloaded and installed.

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How to Deploy Django project on PythonAnywhere

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How to Create Blinking Text using CSS ? - GeeksforGeeks

Details: Blinking text effect also be known as the flashing text effect can be easily created using HTML and CSS @keyframes rule and the opacity property.. HTML Code: In this section, we will create a basic div element which will have some text inside it.

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How to pass data into a bootstrap modal? - GeeksforGeeks

Details: Example 2: In this approach, a textarea is used to take input from the user. When the submit button is clicked, it invokes the jQuery function. The data entered the text area is extracted using the val() method into the text variable.

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How to set location and location.href using JavaScript

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How to insert spaces/tabs in text using HTML/CSS

Details: Spacing can be added using HTML and CSS by 3 approaches: Method 1: Using the special characters designated for different spaces. The   character entity used to denote a non-breaking space which is a fixed space. This may be perceived as twice the space of a normal space.

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How to validate an email in ReactJS ? - GeeksforGeeks

Details: Email validation is an important step in every application in order to authenticate user email. It can be achieved using the validator module in ReactJS.The following example shows how to validate the user entered email and checking whether it is valid or not using the npm module in React Application.

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How to map data into Components using ReactJS? - GeeksforGeeks

Details: Example: Mapping data from list.js file to custom Info component using the map function. App.js: Import Users array and Info component in the App.js file. Use the map function to map each element of User arrays to the Info component.

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How to connect to an API in JavaScript ? - GeeksforGeeks

Details: An API or Application Programming Interface is an intermediary which carries request/response data between the endpoints of a channel. We can visualize an analogy of API to that of a waiter in a restaurant. A typical waiter in a restaurant would welcome you and ask for your order.

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How to get the height of device screen in JavaScript

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How to detect browser or tab closing in JavaScript

Details: A tab or window closing in a browser can be detected by using the beforeunload event. This can be used to alert the user in case some data is unsaved on the page, or the user has mistakenly navigated away from the current page by closing the tab or the browser.

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How to compare two NumPy arrays? - GeeksforGeeks

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How to check form submission in PHP ? - GeeksforGeeks

Details: Output: Step 2: Create PHP file for POST method Use isset() method in PHP to test the form is submitted successfully or not. In the code, use isset() function to check $_POST[‘submit’] method. Remember in place of submit define the name of submit button. After clicking on submit button this action will work as POST method.

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How to select multiple columns in a pandas dataframe

Details: Python is a great language for doing data analysis, primarily because of the fantastic ecosystem of data-centric Python packages. Pandas is one of those packages and makes importing and analyzing data much easier.. Let’s discuss all different ways of selecting multiple columns in a pandas DataFrame.. Method #1: Basic Method Given a dictionary which contains Employee entity as keys and list

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How to iterate through child elements of a div using

Details: jQuery Selector can be used to find (select) HTML elements from the DOM. Once an element is selected, the jQuery children() method is called to find all the child elements of the selected element. To loop through the child elements, the jQuery each() method is used as demonstrated in the following example.. Example 1: The sample HTML page contains a “container” div having some child elements.

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How to clear form after submission in Angular 2

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How to Change the Theme of Code Blocks 20.03 to Dark Mode

Details: Code::Blocks is a popular integrated development environment(IDE) used for compiling codes written in various programming languages like C, C++, Fortran, etc.It is a free and open-source software which is basically a collection of compilers like gcc, visual c++, clang, and so on. Several plugins can be installed to increase its functionality.

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How to check the existence of URL in PHP? - GeeksforGeeks

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How to prevent XSS with HTML/PHP ? - GeeksforGeeks

Details: Using htmlspecialchars() function – The htmlspecialchars() function converts special characters to HTML entities. For a majority of web-apps, we can use this method and this is one of the most popular methods to prevent XSS.

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How to create custom cursor using CSS? - GeeksforGeeks

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How to change the Tkinter label text? - GeeksforGeeks

Details: Now, let’ see how To change the text of the label: Method 1: Using Label.config() method. Syntax: Label.config(text) Parameter: text– The text to display in the label. This method is used for performing an overwriting over label widget.

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How to access variables from another file using JavaScript

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How to change the placeholder text using jQuery

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How to open popup using Angular and Bootstrap

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How to Insert Form Data into Database using PHP

Details: In this article, we are going to store data in database which is submitted through HTML form. Requirements: XAMPP Server (Web Server); HTML; PHP; MySQL; HTML form: First we create an HTML form that need to take user input from keyboard.HTML form is a document which stores information of a user on a web server using interactive controls. An HTML form contains different kind of information such

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How to get circular buttons in bootstrap 4 ? - GeeksforGeeks

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How to validate URL using regular expression in JavaScript

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How to display images in Angular2 ? - GeeksforGeeks

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How to validate PAN Card number using Regular Expression

Details: Given string str of alphanumeric characters, the task is to check whether the string is a valid PAN (Permanent Account Number) Card number or not by using Regular Expression. The valid PAN Card number must satisfy the following conditions: It should be ten characters long. The first five characters should be any upper case alphabets.

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How to remove an HTML element using JavaScript

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How to Set an Image as Wallpaper Programmatically in

Details: Setting wallpaper in Android programmatically is helpful when the application is fetching wallpapers from the API library and asking the user whether to set the wallpaper for the home screen or not. In this article, it’s been discussed how to set a sample image as the home screen wallpaper

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How to change the text of a label using JavaScript

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How to Change the Theme of Netbeans 12.0 to Dark Mode

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How to merge two PHP objects? - GeeksforGeeks

Details: Given two objects of same class and the task is to merge both objects into single object. Approach 1: Convert object into data array and merge them using array_merge() function and convert this merged array back into object of class stdClass. Note: While merging the objects using array_merge(), elements of array in argument1 are overwritten by elements of array in argument2.

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How to get selected value in dropdown list using

Details: Method 1: Using the value property: The value of the selected element can be found by using the value property on the select element that defines the list. This property returns a String representing the value attribute of the

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How to show or hide element in React ? - GeeksforGeeks

Details: cd foldername; Hide or Show Component in ReactJS As we discussed above we have to create few components and render them into a single parent file to execute the conditions so that we can apply the functionality of showing or hiding to some particular components. Let’s create three child components and name them Child1.js, Child2.js, and Child3.js in the src folder and paste the following

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How to align a logo image to center of navigation bar

Details: Problem statement: You must have seen that while applying margin:auto property to the image tag in the navigation bar, the logo image in the navigation bar does not get centered. Approach: As the image tag in CSS is an inline element, so the image tag will occupy only that much space which is required by it. So, in order to resolve this problem, we have assigned the display property of the

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How to remove an added list items using JavaScript

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How to Delete Tkinter Text Box's Contents? - GeeksforGeeks

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