mirror of
https://github.com/toss/es-toolkit.git
synced 2024-11-27 14:57:44 +03:00
883553b39b
* add last function * add last test case * add last bench mark * add last docs * fix ko last docs comment * add last en.mts, ko.mts * Update src/array/last.ts * Update src/array/last.spec.ts * Update docs/reference/array/last.md * Update docs/ko/reference/array/last.md * Update docs/ko/reference/array/last.md * Update docs/reference/array/last.md --------- Co-authored-by: Sojin Park <raon0211@gmail.com>
890 B
890 B
last
Returns the last element of an array.
This function takes an array and returns the last element of the array. If the array is empty, the function returns undefined.
Signature
function last<T>(arr: [...T[], T]): T;
function last<T>(arr: T[]): T | undefined;
Parameters
arr(T[]): The array from which to get the last element.
Returns
(T | undefined): The last element of the array, or undefined if the array is empty.
Example
const arr1 = [1, 2, 3];
const result = last(arr1);
// result will be 3
const arr2: number[] = [];
const result = last(arr2);
// result will be undefined
const largeArray = Array(1000)
.fill(0)
.map((_, i) => i);
const result = last(largeArray);
// result will be 999
const nestedArray = [
[3, 1],
[3, 2],
[3, 3],
];
const result = last(nestedArray);
// result will be [3,3]