题解 | #数组中出现次数超过一半的数字#
数组中出现次数超过一半的数字
http://www.nowcoder.com/practice/e8a1b01a2df14cb2b228b30ee6a92163
使用遍历+哈希搞定
function MoreThanHalfNum_Solution(numbers) { // write code here let target = Math.floor(numbers.length/2); let hashMap = new Map(); for(let i of numbers){ hashMap.set(i, 1 + (hashMap.has(i) ? hashMap.get(i) : 0)); if(hashMap.get(i) > target) return i; } } module.exports = { MoreThanHalfNum_Solution : MoreThanHalfNum_Solution };