27 lines
No EOL
802 B
JavaScript
27 lines
No EOL
802 B
JavaScript
/**
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* Given an array and a number N, return a new array which contains every nTh
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* element of the input array. For n below 1, an empty array is returned.
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* For n equal to 1, the input array is returned as is.
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* For n greater than the length of the array, an array containing the first element
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* and every nTh element after that (if any) is returned.
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*
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* @param array An input array.
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* @param n A number specifying which elements to take.
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* @returns The result array of the same type as the input array.
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*/
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export function getEveryNth(array, n) {
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if (n < 1) {
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return [];
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}
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if (n === 1) {
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return array;
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}
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var result = [];
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for (var i = 0; i < array.length; i += n) {
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var item = array[i];
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if (item !== undefined) {
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result.push(item);
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}
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}
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return result;
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} |