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Aggregate Functions : These operate on a set of values and return a single value. COUNT() : Counts the number o SELECT COUNT ( * ) FROM em...
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1. Array.prototype.reduce() The reduce method executes a reducer function on each element of the array, resulting in a single output valu...
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Memoization is a form of caching where the return value of a function is cached based on its parameters. If the parameter of that function...
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1. Sorting Algorithms Bubble Sort : A simple comparison-based algorithm that repeatedly steps through the list, compares adjacent elements,...
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In JavaScript, the global environment record is a concept related to how variable and function declarations are handled within the global sc...
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In JavaScript, you can check if a value exists in an array using several methods. Here are a few common ways: Using includes() Method : Th...
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We can 5 ways to create objects in JavaScript. Lets understand how to Create it... Demo URL 'use strict' ; Example 1 var ...
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Answer: Performance optimization can be achieved through: Lazy Loading : Load modules only when needed. Change Detection Strategy : Use OnP...
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Demo URl Code Example Here function renameKeys ( obj, newKeys ) { const keyValues = Object . keys (obj). map ( key => { const...
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