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                題目要求:給定如下字符串'get-element-by-id',將其轉化為駝峰命名 要點: 1. split('-'),根據'-'分割字符串變為數組 2. chatAt(0):獲取字符串第一位的值 3. substr(起始點,長度): 截取字符串 4. substring(起始點,結束點) 5. join(''):將數組以指定字符合并為字符串 ``` var foo1 = 'get-element-by-id'; function toTstring(foo) { var arr = foo.split('-'); for(var i=1; i<arr.length; i++) { arr[i] = arr[i].charAt(0).toUpperCase() + arr[i].substr(1, ); } return arr.join(''); } console.log(toTstring(foo1)); ```
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