123456789101112131415 function (arr){ var b = arr.join(","); //遍历字符串b for (var i = 0; i < b.length; i++) { //替换字符串b第一个与arr[i]匹配的字符为""并从头到尾地检索字符arr[i],有重复项则返回true,否则返回false if (b.replace(arr[i],"").indexOf(arr[i])>-1) { return true; } } return false;} 赞微海报分享
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