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Javascript Articles
Page 262 of 534
Create array from JSON object JavaScript
In this article, we will learn to create an array from JSON data in JavaScript. JSON is a widely used format for storing and exchanging data. A common use case involves extracting specific data from a JSON object or array and converting it into a separate array for further processing. What is JSON Data? JSON (JavaScript Object Notation) is a lightweight data format commonly used to store and exchange data between a server and a client. It represents data as key-value pairs and is easy for both humans and machines to read and write. In JavaScript, JSON objects ...
Read MoreJavaScript: Adjacent Elements Product Algorithm
In this article, we will learn to calculate the adjacent elements product with the help of JavaScript functionalities. This problem is often asked in coding interviews or algorithm challenges, and it tests one's understanding of array manipulation and performance optimization. Problem Statement Given an array of integers, your task is to return the largest product that can be obtained by multiplying any two adjacent numbers in the array. For example − Input: [5, 1, 2, 3, 1] Output: 6 The adjacent elements are (5, 1), (1, 2), (2, 3), and (3, 1). The largest ...
Read MoreJavaScript Array Ranking
In this article, we will learn to rank elements in arrays using JavaScript. Ranking elements in an array is common in various applications, such as sorting scores, evaluating performance, or analyzing data. What is Array Ranking? Array ranking involves assigning a rank to each element of an array based on its value, where the largest value gets the highest rank and the smallest value gets the lowest rank. This ranking can be extended to multiple arrays to analyze and compare data across different datasets. Problem Statement We are given multiple arrays of numbers. The task is ...
Read MoreAppending Suffix to Numbers in JavaScript
Appending suffixes to numbers in JavaScript is used to add ordinal indicators (like "st", "nd", "rd", and "th") to the end of a number to denote its position in a sequence. This is useful for displaying dates, rankings, or other numeric data. A custom function can be created to append the correct suffix to a given number. The function handles special cases for numbers ending in 11, 12, and 13, and applies the appropriate suffix based on the last digit for other numbers. Rules for Ordinal Suffixes ...
Read MoreConverting any case to camelCase in JavaScript
In this article, we create a function that can take a string in any format. Such as normal case, snake case, pascal case or any other into camelCase in JavaScript. camelCase is a writing style where each word within a phrase is capitalized, except for the first word, and there are no spaces or punctuation. Let us understand through some sample example of I/O Scenario − Sample Input - const str = 'New STRING'; Sample Output - const output = 'newString'; Converting any case to camelCase in JavaScript Converting any ...
Read MoreConverting array to phone number string in JavaScript
To convert an array to a phone number string in JavaScript can be done by formatting the array elements into the desired phone number pattern. Following are the steps to learn how to convert array to phone number string in Javascript − Ensure that the array has the correct number of elements (usually 10 for a standard phone number). Join the elements of the array into a single string. Format the string into the desired phone number pattern, such as (XXX) XXX-XXXX. Let ...
Read MoreConverting seconds in years days hours and minutes in JavaScript
In this article, we create a function that takes in a number(num) which represents the number of seconds. So, it construct and return a string that contains information of years, days, hours and minutes contained in those seconds. Converting seconds into years, days, hours, and minutes in JavaScript involves breaking down a given total of seconds into more understandable time units. This process helps display elapsed time in a readable format. For the purpose of the article, we will consider that all the years have 365 days. Let us understand through some sample example of I/O Scenario ...
Read MoreJavaScript - Check if value is a percentage?
To check the value for percentage, use a regular expression. When dealing with user input or processing data in JavaScript, it's important to make sure a value is a valid percentage. This article shows you how to check if a value is a percentage using JavaScript, highlighting a useful method that involves regular expressions. Let's say the following is our value: var value = "97%"; To check the value for percentage, we are using a regular expression that matches numbers followed by the % symbol. Using Regular Expression The best way to check ...
Read MoreJavaScript: How to filter out Non-Unique Values from an Array?
To filter out non-unique values from an array in JavaScript, you can use the filter() method, a for loop, the Set and filter() method, and the reduce() method. In this article, we will filter out non-unique values and return an array that only contains unique non-repeating elements. Arrays are data structures used to store data in a structured format. We can store the data in an array and retrieve them using their indexes. These indexes serve as a key for these values. Table of Content Filtering non-unique values from an array can be done in the following ways: ...
Read MoreJavaScript: How to map array values without using \"map\" method?
When you need to transform array elements without using the built-in map() method, JavaScript provides several alternatives. These approaches manually iterate through arrays and apply transformations to create new arrays with modified values. Table of Contents You can map array values without using the map method in the following ways: Using forEach() Using reduce() Using a for Loop Using while Loop Using forEach() The forEach() method iterates through each array element, allowing you to apply transformations while manually building a ...
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