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                [TOC] >[success] # 字符串split() 方法 ~~~ split() 方法用于把一個'字符串'分割成'字符串數組'。 split(separator, howmany) separator // 是分割條件,separator可以為正則表達式(必填) howmany // 參考例子1的第三個案例 ~~~ <br/> >[success] ## 使用方法 ~~~ 例子1 let arr = "How are you doing today?" arr.split(' ') // ["How", "are", "you", "doing", "today?"] arr.split('') // ["H", "o", "w", " ", "a", "r", "e", " ", "y", "o", "u", " ", "d", "o", "i", "n", "g", " ", "t", "o", "d", "a", "y", "?"] arr.split(' ',3) // ["How", "are", "you"] 例子1的'第一個案例'在 split() 中傳入了一個空格,他會在字符串中尋找空格當做分割的條件, 例子1的'第二個案例'在 split() 中傳入了一對單引號(雙引號也行),split方法會把字符串全都分割 例子1的'第三個案例'在 split() 中傳入了一個空格,第二個參數傳入了3,split方法會按照空格作為條件匹配的前三個分割成數組 ~~~ ~~~ 例子2 分割結構更為復雜的字符串: "2:3:4:5".split(":") // ["2", "3", "4", "5"] "|a|b|c".split("|") // ["", "a", "b", "c"] ~~~ ~~~ 例子3 如果您希望把單詞分割為字母,或者把字符串分割為字符,可使用下面的代碼: "hello".split("") // ["h", "e", "l", "l", "o"] "|a|b|c".split("|") // ["", "a", "b", "c"] 若只需要返回一部分字符,請使用 howmany 參數 "hello".split("", 3) //可返回 ["h", "e", "l"] ~~~
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