29 lines
843 B
JavaScript
29 lines
843 B
JavaScript
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//#region src/array/last.ts
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/**
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* Returns the last element of an array.
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*
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* This function takes an array and returns the last element of the array.
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* If the array is empty, the function returns `undefined`.
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*
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* Unlike some implementations, this function is optimized for performance
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* by directly accessing the last index of the array.
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*
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* @template T - The type of elements in the array.
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* @param {T[]} arr - The array from which to get the last element.
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* @returns {T | undefined} The last element of the array, or `undefined` if the array is empty.
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*
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* @example
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* const arr = [1, 2, 3];
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* const lastElement = last(arr);
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* // lastElement will be 3
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*
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* const emptyArr: number[] = [];
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* const noElement = last(emptyArr);
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* // noElement will be undefined
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*/
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function last(arr) {
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return arr[arr.length - 1];
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}
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//#endregion
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exports.last = last;
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