deno.land / x / masx200_leetcode_test@10.6.5 / count-number-of-pairs-with-absolute-difference-k / index.ts
123456789export default function countKDifference(nums: number[], k: number): number { const map = new Map<number, number>(); return nums.reduce((a, v) => { const r = a + (map.get(v + k) ?? 0) + (map.get(v - k) ?? 0); map.set(v, 1 + (map.get(v) ?? 0)); return r; }, 0);}
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