var arr = ‘abcabcab‘ var obj = {}; for (var i = 0; i < arr.length; i++) { var key = arr[i]; if (obj[key]) { obj[key]++; } else { obj[key] = 1; } } console.log(obj)
js 统计字符串或者数组的出现次数
原文：https://www.cnblogs.com/fanqiuzhuji/p/13379554.html
