Function to remove an element from an array at the specified index.
- The
Array.prototype.slice()method returns a subset of the array. - It slices the Array into two parts that do not have the element at a specific index in it.
const names = ["John", "Philips", "Usian", "Brady", "Colt", "Jesse"];
The Below Code returns the new Array.
Example 1
const removeElementAt = (arr, i) => (i || i === 0) ? [...arr.slice(0, i), ...arr.slice(i + 1)] : arr; const newArr = removeElementAt(names, 1); console.log(names) console.log(newArr)
// [ 'John', 'Philips', 'Usian', 'Brady', 'Colt', 'Jesse' ] // [ 'John', 'Usian', 'Brady', 'Colt', 'Jesse' ]
- For mutating, you can simply use the
Array.prototype.splice()method. - The Below Code mutates the original Array
Example 2
const removeElementAt = (arr, i, mutate = false) => (i || i === 0) ? mutate ? arr.splice(i, 1) && arr : [...arr.slice(0, i), ...arr.slice(i + 1)] : arr;
- By Adding the
mutate=true, you can mutate the original array.
const newArr = removeElementAt(names, 3, true); console.log(names) console.log(newArr)
// [ 'John', 'Philips', 'Usian', 'Colt', 'Jesse' ] // [ 'John', 'Philips', 'Usian', 'Colt', 'Jesse' ]