JavaScript String replace() (字串取代) | nodejs str replace
![JavaScript String replace() (字串取代)](https://i.imgur.com/axBPWDg.jpg)
replace方法用來將字串[1]中的字取代為另一個字。語法:str.replace(regexp|substr,newSubStr|function)取代後會返回一個新的字串。用法:varstr=ThisisApple.;//輸出ThisisBanana.console.log(str.replace(Apple,Banana));第一個參數也可以使用正規表示式(Regex)[2]:varre=/apples/gi;varstr=Applesareround,andapplesarejuicy.;varnewstr=str.replace(re,oranges);//輸出orangesareround,andorangesarejuicy.console.log(newstr);取代的字串中,我們可以用$1$2$3...來表示匹配的群組(capturinggroup):varre=/(w+)s(w+)/;varstr=Jo...
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replace 方法用來將字串[1]中的字取代為另一個字。
語法:
str.replace(regexp|substr, newSubStr|function)取代後會返回一個新的字串。
用法:
var str = This is Apple.; // 輸出 This is Banana. console.log(str.replace(Apple, Banana));第一個參數也可以使用正規表示式 (Regex)[2]:
var re = /apples/gi; var str = Apples are round, and apples are juicy.; var newstr = str.replace(re, oranges); // 輸出 oranges are round, and oranges are juicy. console.log(newstr);取代的字串中,我們可以用 $1 $2 $3... 來表示匹配的群組 (capturing group):
var re = /(w+)s(w+)/; var str = John Smith; var newstr = str.replace(re, $2, $1); // 輸出 Smith, John console.log(newstr);第二個參數可以是一個函數,傳入的參數如下:
replacer(match, p1, p2, p3,..., offset, string) match 表示匹配的字串p1, p2, p3... 表示匹配的群組offset 為匹配的字串在原字串中的位置,從 0 算起string 為要被匹配的完整字串function replacer(match, p1, p2, p3, offset, string) { return [p1, p2, p3].join( - ); } // 輸出 abc - 12345 - #$*% console.log(abc12345#$*%.replace(/([d]*)(d*)([w]*)/, replacer)); 最後更新: 2020-02-06 勘誤回報[3]References 字串 (www.fooish.com...取得本站獨家住宿推薦 15%OFF 訂房優惠
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