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                [TOC] >[success] # 數組的forEach()方法 ~~~ 'forEach()就是讓數組中的每一項做一件事' ~~~ ~~~ forEach(item,index,arr,thisArg) forEach總共有4個參數 item // 數組中的每一個值(必填) index // 數組中的每一個值得索引值 arr // 當前循環的數組 thisArg // 暫時不知道是干嘛的 ~~~ <br/> >[success] ## 使用方法 ~~~ var arr = [1, 2, 3, 4, 5] arr.forEach((item,index) => { console.log(item) }) // 1 // 2 // 3 // 4 // 5 ~~~ ~~~ 注意: forEach()方法不能return和break ~~~
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