7 lines
277 B
JavaScript
7 lines
277 B
JavaScript
const sortedIndexBy = (arr, n, fn) => {
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const isDescending = fn(arr[0]) > fn(arr[arr.length - 1]);
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const val = fn(n);
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const index = arr.findIndex(el => (isDescending ? val >= fn(el) : val <= fn(el)));
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return index === -1 ? arr.length : index;
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};
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module.exports = sortedIndexBy; |