javascript中使用replaceAll()函数实现字符替换的方法 |
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本文标签：replaceAll,字符替换 而str.replace(/\-/g,"!")则可以全部替换掉匹配的字符(g为全局标志) 。 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!” 所以可以用以下几种方式.： string.replace(/reallyDo/g, replaceWith); string.replace(new RegExp(reallyDo, g), replaceWith); string：字符串表达式包含要替代的子字符串 。 reallyDo：被搜索的子字符串 。 replaceWith：用于替换的子字符串 。 复制代码 代码如下: <script type="text/javascript"> String.prototype.replaceAll = function(reallyDo, replaceWith, ignoreCase) { if (!RegExp.prototype.isPrototypeOf(reallyDo)) { return this.replace(new RegExp(reallyDo, (ignoreCase ? "gi": "g")), replaceWith); } else { return this.replace(reallyDo, replaceWith); } } </script> |
