21 lines
629 B
JavaScript
21 lines
629 B
JavaScript
//#region src/array/head.ts
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/**
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* Returns the first element of an array or `undefined` if the array is empty.
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*
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* This function takes an array and returns the first 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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* @template T - The type of elements in the array.
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* @param arr - The array from which to get the first element.
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* @returns The first 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 emptyArr: number[] = [];
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* const noElement = head(emptyArr);
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* // noElement will be undefined
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*/
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function head(arr) {
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return arr[0];
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}
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//#endregion
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export { head };
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