9 lines
291 B
JavaScript
9 lines
291 B
JavaScript
const sortedLastIndex = (arr, n) => {
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const isDescending = arr[0] > arr[arr.length - 1];
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const index = arr
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.map((val, i) => [i, val])
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.reverse()
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.findIndex(el => (isDescending ? n <= el[1] : n >= el[1]));
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return index === -1 ? 0 : arr.length - index - 1;
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};
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module.exports = sortedLastIndex; |