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Modifying a RegEx pattern to work whether or not there is a space between two elements.

Posted on 2016-08-19
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Last Modified: 2016-08-19
I have a regex pattern that picks up on strings containing a number followed by a letter or letters, but I need it to pick up on strings where there is a space between the number and the letters that come after it. My current pattern is this: s*\d{1,3}[A-M]. It will pick up 18ABC but not 18 ABC. I haven't used RegEx for a while and I can't remember how to write that.  I'm working in Excel if that makes a difference.

Thanks!

John
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Question by:gabrielPennyback
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Russ Suter earned 500 total points
ID: 41762844
s*\d{1,3}\s*[A-M]

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will give you a match if there is ANY whitespace between the numbers and letters
s*\d{1,3}\s{0,1}[A-M]

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will give you a match if there are exactly zero or one whitespace characters between the numbers and letters

If you're specifically looking for the space character (ascii value 32) and not any whitespace (which can include tabs, new lines, or other whitespace depending on regex options) then you could do this:
s*\d{1,3}[ ]{0,1}[A-M]

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Or even more explicitly, call out the octal ASCII value of the space character like this:
s*\d{1,3}\40{0,1}[A-M]

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I could probably keep coming up with variants that would serve your needs. Regex is extremely flexible. Let me know if you need more than above.

By the way, the Regex you provided would only match "18A" on the string "18ABC". It would not match "18ABC". For that you'd need to include a trailing asterisk which means [zero or more repetitions].
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by:gabrielPennyback
ID: 41762978
That does it, Russ, thanks!
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