How do I write a regular expression to match the following
CONTEXT_84 =
or
CONTEXT_5 =
thanks
This is perfectly correct given the question, but probably not what the OP actually intended
Draemon
2009-07-24 12:11:14
I think you mean CONTEXT_(84|5). You're match will match CONTEXT_8, CONTEXT_4, CONTEXT_5 and CONTEXT_|, but not CONTEXT_84. Also, there should be a space or \s* or something before the '='
Al
2009-07-24 12:27:22
-1, wrong regex for the problem, as stated by another comment.
Adriano Varoli Piazza
2009-07-24 12:53:04
+3
A:
it depends on your target language, but the main difference between the two is the numbers, so you can do this to get 'CONTEXT_' with at least one number followed by a space and an '=':
CONTEXT_[0-9]+ =
or this, to get 'CONTEXT_' with min of one, max of two numbers, followed by a space and an '=':
CONTEXT_[0-9]{1,2} =
akf
2009-07-24 12:04:02
+6
A:
Hi Matt,
try
CONTEXT_\d{1,2} =
Which means:
CONTEXT_\d{1,2}
Match the characters “CONTEXT_” literally «CONTEXT_»
Match a single digit 0..9 «\d{1,2}»
Between one and 2 times, as many times as possible, giving back as needed (greedy) «{1,2}»
Created with RegexBuddy
crono
2009-07-24 12:05:23
+1 (assuming this is what the OP intended). Also RegexBuddy attempts to make a human readable explanation of the regex? That's kind of neat, I'll have to look at it.
Falaina
2009-07-24 12:15:50
Yeah - the explanation is exported from the "Create" Window of RegexBuddy - I found it very helpful when I was learning regex
crono
2009-07-24 12:27:34
+1
A:
Your question already contains the answer: you ask
how do I match
CONTEXT_84 =orCONTEXT_5 =?
That's already all you need, the only thing missing is how to say or in Regexp, and that's |.
So, your solution is
CONTEXT_84 =|CONTEXT_5 =
You can shorten that by pulling out the common parts:
CONTEXT_(84|5) =
And you're done!
Jörg W Mittag
2009-07-24 16:48:23