Created
August 6, 2023 17:32
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find.ts
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| export default function findInArray<T>( | |
| arr: T[], | |
| callback: (element: T, index: number, array: T[]) => boolean | |
| ): T | undefined { | |
| if (typeof callback !== 'function') { | |
| throw new TypeError('callback must be a function') | |
| } | |
| const list = Object(arr) | |
| // Makes sure it always has a positive integer as length. | |
| const length = list.length >>> 0 | |
| const thisArg = arguments[2] | |
| for (let i = 0; i < length; i++) { | |
| const element = list[i] | |
| if (callback.call(thisArg, element, i, list)) { | |
| return element | |
| } | |
| } | |
| return undefined | |
| } |
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