javascipt replace()

最新推荐文章于 2025-06-30 21:17:48 发布

最新推荐文章于 2025-06-30 21:17:48 发布 · 112 阅读

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#ASP

本文介绍了JavaScript中使用replace方法来替换字符串中的特定字符或模式。该方法接受正则表达式作为参数，并能根据是否存在g标志来进行局部或全局替换。


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[size=medium]replace() 
The replace() method returns the string that results when you replace text matching its first argument 
(a regular expression) with the text of the second argument (a string). 
If the g (global) flag is not set in the regular expression declaration, this method replaces only the first 
occurrence of the pattern. For example, 
var s = "Hello. Regexps are fun.";s = s.replace(/\./, "!"); // replace first period with an exclamation pointalert(s);
produces the string “Hello! Regexps are fun.” Including the g flag will cause the interpreter to 
perform a global replace, finding and replacing every matching substring. For example, 
var s = "Hello. Regexps are fun.";s = s.replace(/\./g, "!"); // replace all periods with exclamation pointsalert(s);
yields this result: “Hello! Regexps are fun!” 
本文来源于 KinJAVA日志 (http://jorkin.reallydo.com) 
原文地址: http://jorkin.reallydo.com/article.asp?id=275[/size][/color]