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Hello Januk Aggarwal !
On Sun, 28 Jan 2001 03:29:30 -0800 GMT your local time,
which was 28.01.2001, 12:29 (GMT+0100) where I live, you wrote:
[...]
GE>> Ah, example: (\d*?)[a-z] does this mean:
GE>> "find none [...] digit if followed by a lowercase letter and store digit
GE>> in subpatt or, if it is the only way the pattern matches, take as many
GE>> digits as necessary followed by a lowercase letter to store the digits in
GE>> subpatt"?
> Note the editing, but yes, that's the idea.
Aaahhhh, I think I'm going to understand!! The editing [...] shows my
error.
[...]
> Well, consider this: Suppose you have the string "1234567a", and you
> apply your example. Then the minimum number of digits before the "a"
> is zero. So you'd get an empty subpattern. Now if you remove the "?"
> from your example, you'd match the maximum number of digits, and so
> the subpattern would hold "1234567"
Yippiiee, I think I got it! In other words, with the ? added to the
metacharacter the regex always takes the left border if the pattern
matches:
* means {0,} so 0 is taken
+ means {1,} so 1 is taken
? means {0,1} so 1 is taken
[...]
> Maybe this variation from the help file one will help. Suppose you
> have two sentences on a single line:
Ooops, I should have a closer look to the English help file. I usually use
the German one.
[...example snipped...]
Great, that's it. It made "plopp" in my brain! I tested this one in the new
German help file regex-test-feature. Works perfect.
> Is it any clearer now?
Yes, definitely. May be it was a small step for you, but be assured it was
a very big jump for me! Thank you again!!
> (I'll keep asking until you stop asking good
> questions. Keep them coming.)
Haha, thanks. I will do that. Thanks for your patience!
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Best regards,
Gerd
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The right to be let alone is indeed the beginning of all freedom.
(Supreme Court Justice William O. Douglas 1952,
Public Utilities Commission v Pollak)
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