js替换字符串中所有指定的字符(实现代码)
2019/6/27 22:12:10
本文主要是介绍js替换字符串中所有指定的字符(实现代码),对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!
第一次发现JavaScript中replace() 方法如果直接用str.replace("-","!") 只会替换第一个匹配的字符.
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。
Js代码
<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>
以上这篇js替换字符串中所有指定的字符(实现代码)就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持找一找教程网。
这篇关于js替换字符串中所有指定的字符(实现代码)的文章就介绍到这儿,希望我们推荐的文章对大家有所帮助,也希望大家多多支持为之网!
- 2024-03-30[OIDC in Action] 2. 基于OIDC(OpenID Connect)的SSO(纯JS客户端)
- 2024-03-29terraform jsonencode
- 2024-03-13vuex-persist
- 2024-03-11icons for vue
- 2024-03-07breadcrumbs react js
- 2024-03-06react login page example
- 2024-03-06react router uselocation
- 2024-03-04postgres jsonb_set
- 2024-03-01react native uuid
- 2024-02-29vuejs sidebar