# echo BUILD-AM005-a | sed 's/[^0-9]//g'<br>005<br><br>Sean<br><br><br><br><div><span class="gmail_quote">On 5/9/07, <b class="gmail_sendername">Steve Moffat</b> <<a href="mailto:Steve.Moffat@ca.ibm.com">Steve.Moffat@ca.ibm.com
</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div>
<p>Hi All;<br>
I've been trying to write a sed function to return only a numeric portion of a string, but can't seem to get it working.<br>
The input is a single string of letters and numbers, with the numbers always consecutive.<br>
For example: BUILD-AM005-a<br>
<br>
I want to get the 005 out of this string.<br>
<br>
echo BUILD-AM005-a | sed 's/.*\([[:digit:]]\).*/\1/g'<br>
<br>
will return the digit 5. This is good!<br>
<br>
So I add an asterisk to try to match multiple digits like:<br>
echo BUILD-AM005-a | sed 's/.*\([[:digit:]]*\).*/\1/g'<br>
<br>
and instead of returning 005, it doesn't match anything, so returns nothing.<br>
<br>
Can any of you RE maters help me out?<br><span class="sg">
<br>
Steve Moffat<br>
IBM Global Services<br>
<a href="mailto:sjm@ca.ibm.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">sjm@ca.ibm.com</a><br>
(204)792-3245<br>
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<br>-- <br>Sean Walberg <<a href="mailto:sean@ertw.com">sean@ertw.com</a>> <a href="http://ertw.com/">http://ertw.com/</a>