[英]Regex based replace in js
實際上我想要替換一個字符串,除非它是一個圓括號。
例如:
JAVA is a nice language. (JAVA) has lots of features. JAVA is portable. (JAVA) even comes in 64 bit.
現在,如果我用C替換JAVA:
那么期望的輸出是:
C is a nice language. (JAVA) has lots of features. C is portable. (JAVA) even comes in 64 bit.
甚至java都可以作為子字符串來
XJAVAX is a nice language. (XJAVAX) has lots of features. JAVA is portable. (JAVA) even comes in 64 bit.
現在,如果我用C替換JAVA:
然后預期輸出:
XCX is a nice language. (XJAVAX) has lots of features. C is portable. (JAVA) even comes in 64 bit.
由於JavaScript沒有后視,最簡單的方法可能是改變:
str = str.replace(/\(JAVA\)|JAVA/g, function(m) {
return m === "(JAVA)" ? m : "C";
// Or
// return m.length === 6 ? m : "C";
});
除此之外,您還可以嘗試模擬look-behind ,這在某些方面是可能的,但是很混亂。
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