Javascript正则表达式 - 古怪的字符串

Question

I have a string (below) that I need to extract certain data between two characters.

var str = "%T4271445443612318^MARK/Wdogn^14011011002033da?;411111111111111=140ke011lmn0529oqme00?";

I need to capture this number:
It is between a ";" and "=" always.

Any help I am still new to RegEx.

Answer 1

This would be ;(\\d+)=

http://www.regular-expressions.info/javascriptexample.html is your friend. :)

Answer 2

how about something like

;(\d+)=

which does the following:

• matches ; char
• \\d+ matches one or more numeric char
• the ( and ) capture the number into a capturing group
• = matches the equals char at the end

Answer 3

var fourOneOne = str.match(/;(\d+)=/)[0];

Answer 4

If it's always formatted as you suggest, you don't need a regex:

var str = "%T4271445443612318^MARK/Wdogn^14011011002033da?;411111111111111=140ke011lmn0529oqme00?";
var sub = str.substring(str.indexOf(';')+1,str.indexOf('='));

http://jsfiddle.net/7ym3m/