javascript正则表达式笔记

注意：javascript的正则模式不带引号，而是以/开始，以/结束！

<script>var url = "/var/www/test/downloads/20131024/2343242344435.png"; var reg = /\/var\/www\/test\/downloads\//;url = url.replace(reg,"");document.write(url);</script>

输出：

20131024/2343242344435.png

参考：http://www.cainiao8.com/web/js_note/js_regular_expression_blueidea.html#_Toc213927719

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update:

匹配当前URL中符合要求的数字：

<script>var url = "https://www.test.com?adgroup_id=119#";var reg = /adgroup_id=(\d+)/;var adgroup_id = url.match(reg);alert(adgroup_id[1]);</script>