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                ## **字符串去重** 第一種 ``` var a = "acabababdd"; var arr = a.split('');//1.字符串轉數組 console.log(arr); arr2 = []; for (var i = 0; i < arr.length; i++) {//2.數組去重復 if (arr2.indexOf(arr[i]) < 0) { arr2.push(arr[i]); } } console.log(arr2); c = arr2.join('');//3.數組轉字符串 console.log(c) ``` 第二種 ``` var a = "acabababdd"; var b= [...new Set(a)].join(""); console.log(b); ```
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