array-splice – Tarik Billa

How to remove all element from array except the first one in javascript

August 20, 2023 by Tarik

You can set the length property of the array. var input = [‘a’,’b’,’c’,’d’,’e’,’f’]; input.length = 1; console.log(input); OR, Use splice(startIndex) method var input = [‘a’,’b’,’c’,’d’,’e’,’f’]; input.splice(1); console.log(input); OR use Array.slice method var input = [‘a’,’b’,’c’,’d’,’e’,’f’]; var output = input.slice(0, 1) // 0-startIndex, 1 – endIndex console.log(output);

Deleting array elements in JavaScript – delete vs splice

August 29, 2022 by Tarik

delete will delete the object property, but will not reindex the array or update its length. This makes it appears as if it is undefined: > myArray = [‘a’, ‘b’, ‘c’, ‘d’] [“a”, “b”, “c”, “d”] > delete myArray[0] true > myArray[0] undefined Note that it is not in fact set to the value undefined, … Read more