Question

我正在寻找regexp的方法，只有在{c} text {/ c}块没有包围该单词时才匹配，并且找到了一种方法

/(?![^{]*.*})(.+?)(?![^{]*.*})/g

但它忽略了两个{}（{} text {}被忽略的任何环绕声，这不是我想要的。正则表达式是我的聊天应用程序，它是用节点js编写的。关键是我希望其他正则表达式不解析{c} {/ c}块中的任何内容，甚至是其他{c} {/ c}块，例如

{c} 
   {c} text {/c} this is how you show codes 
{/c}

变为

<pre> 
   {c} text {/c} this is how you show codes 
</pre>

编辑：这就是我现在正在使用的。

var from = [
/(?![^{]*.*})`(.+?)`(?![^{]*.*})/g, /*bold `text`*/
/(?![^{]*.*})''(.+?)''(?![^{]*.*})/g, /*italics ''text''*/
/(?![^{]*.*})~~(.+?)~~(?![^{]*.*})/g, /*strikethrough ~text~*/
/(?![^{]*.*})@@(.+?)@@(?![^{]*.*})/g, /*code @@text@@*/
/{q}\s*(.+?)\s*{\/q}/g, /*quote {q}text{/q}*/
/{c}\s*(.+?)\s*{\/c}/g, /*preview {c}text{/c}*/
];

var to = [
    "<strong>$1</strong>",
    "<em>$1</em>",
    "<span style='text-decoration:line-through'>$1</span>",
    "<code>$1</code>",
    "<blockquote>$1</blockquote><br />",
    "<pre class=\"code\">$1</pre><br />",
];

Answer 1

以下正则表达式将执行相同的工作。它会覆盖{c}和{/c}之间包裹的整个字符串。

/{c}(.*){\/c}/g

使用纯 Javascript：

＆＃13;

var str = "{c} {c} text {/c} this codes {/c}";

var word1 = "{c}", word2 = "{/c}"; // words to be removed
var newWord1 = "<PRE>", newWord2 = "</PRE>"; // words need to be replaced

var fIndex = str.indexOf(word1); // getting first occurance of word1
str = str.replace(str.substring(0, word1.length), newWord1); // replacing it with newWord1

var lIndex = str.lastIndexOf(word2); // getting index of last occurance of word2
str = str.substring(0, lIndex) + newWord2 + str.substring(lIndex+word2.length, str.length); // and replacing it with newWord2

console.log(str);

＆＃13;

Regexp忽略块中的单词

1 个答案: