题解 | #数组中重复的数字#
数组中重复的数字
https://www.nowcoder.com/practice/6fe361ede7e54db1b84adc81d09d8524
export function duplicate(numbers: number[]): number {
// write code here
const numberSet = new Set()
for (let i = 0; i < numbers.length;i++) {
if (numberSet.has(numbers[i])) return numbers[i]
numberSet.add(numbers[i])
}
return -1
}
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我也遇到了，所以我早他一步
