How do I find a particular word followed by a space followed by a number?

Question

Using regular expressions, how do I find a particular word followed by a space followed by a number?

Example:

Bug 125

Where "Bug" is should always be the first word found in a line of text followed by a space and then a number and nothing else.

In other words, I don't want to find "Bug 125" as written within some paragraph in the same text file I am parsing.

I haven't tried much because I am terrible at regular expressions. Any help is appreciated.

score 6 · Accepted Answer · edited Feb 27 '14 at 07:24

6

Sounds like you want this:

^Bug [0-9]+$

Where:

edited Feb 27 '14 at 07:24

Sebastian Zartner

answered Feb 27 '14 at 02:40

Timeout

+1 Setting "multiline mode" on the regex engine options probably would be a good idea. – everton Feb 27 '14 at 02:42
1

I hate using `\d` as it kinda obfuscates things. I prefer `[0-9]` as it is clear that we are using the numbers 0 to 9. But that's just my personal preference. – Shadow Man Feb 27 '14 at 02:43
@ShadowCreeper: Someone mentioned on another SO question recently that `[0-9]` is indeed preferable - for a small performance gain but, more importantly, also because `\d` will technically match Unicode characters other than the digits 0-9. This is something to watch for. – J0e3gan Feb 27 '14 at 03:01
1

@ShadowCreeper: Aforementioned mention of `\d`'s looseness - [http://stackoverflow.com/a/21950819/1810429](http://stackoverflow.com/a/21950819/1810429). – J0e3gan Feb 27 '14 at 03:24
1

@J0e3gan Thanks for the link. This is good to know. And that comment points to a more exhaustive list of unicode digits here: http://stackoverflow.com/questions/16621738/d-is-less-efficient-than-0-9/16621778#16621778 – Shadow Man Feb 27 '14 at 19:09

J0e3gan · Answer 2 · 2014-02-27T03:20:49.830

0

This should do it:

^Bug [0-9]+$

edited Feb 27 '14 at 03:20

answered Feb 27 '14 at 02:43

J0e3gan

2 Answers2