Orchid Fairy (兰花仙子) wrote:
> On Wed, Nov 25, 2009 at 11:06 AM, John W. Krahn wrote:
>
>> $ perl -le '$_="aXXXb"; print "one word is $1 at $-[0] to $+[0]" while
>> /(X*)/g;'
>> one word is at 0 to 0
>> one word is XXX at 1 to 4
>> one word is at 4 to 4
>> one word is at 5 to 5
>>
>
> Thanks th
On Nov 24, 7:06 pm, jwkr...@shaw.ca (John W. Krahn) wrote:
> ...
> > 1. before the a
> > 2. between the a and b
> > 3. before the b
> > 4. after the b
>
> > The problem is that the third one should not be there.
>
> Yes it should. Perhaps you are confused because pos() reports the
> current positi
Orchid Fairy (兰花仙子) wrote:
> On Wed, Nov 25, 2009 at 11:06 AM, John W. Krahn wrote:
>
>
>> $ perl -le '$_="aXXXb"; print "one word is $1 at $-[0] to $+[0]" while
>> /(X*)/g;'
>> one word is at 0 to 0
>> one word is XXX at 1 to 4
>> one word is at 4 to 4
>> one word is at 5 to 5
>>
>>
>
On Wed, Nov 25, 2009 at 11:06 AM, John W. Krahn wrote:
>
> $ perl -le '$_="aXXXb"; print "one word is $1 at $-[0] to $+[0]" while
> /(X*)/g;'
> one word is at 0 to 0
> one word is XXX at 1 to 4
> one word is at 4 to 4
> one word is at 5 to 5
>
Thanks that's so smart~
But I'm still confused s
Shawn H Corey wrote:
Jim Gibson wrote:
On 11/24/09 Tue Nov 24, 2009 4:42 PM, "Orchid Fairy (À¼»¨ÏÉ×Ó)"
scribbled:
On Wed, Nov 25, 2009 at 8:38 AM, Shawn H Corey wrote:
It seems to be picking up an extra empty string after a non-zero length
match.
Thanks John and Shawn.
Yup what let m
Shawn H Corey wrote:
Also:
$ perl -le '$_="aXXXb"; @captured = $_ =~ m{ (X*) }gmsx;print "captured:
<", join( ">, <",@captured), ">"'
captured: <>, , <>, <>
@captured = $_ =~ m{ (X*) }gmsx;
Is usually written as:
@captured = /X*/g;
John
--
The programmer is fighting against the two most
Jim Gibson wrote:
> On 11/24/09 Tue Nov 24, 2009 4:42 PM, "Orchid Fairy (兰花仙子)"
> scribbled:
>
>> On Wed, Nov 25, 2009 at 8:38 AM, Shawn H Corey wrote:
>>
>>> It seems to be picking up an extra empty string after a non-zero length
>>> match.
>>>
>> Thanks John and Shawn.
>> Yup what let me b
On 11/24/09 Tue Nov 24, 2009 4:42 PM, "Orchid Fairy (兰花仙子)"
scribbled:
> On Wed, Nov 25, 2009 at 8:38 AM, Shawn H Corey wrote:
>
>>
>> It seems to be picking up an extra empty string after a non-zero length
>> match.
>>
>
> Thanks John and Shawn.
> Yup what let me be confused is that, wh
On Wed, Nov 25, 2009 at 8:38 AM, Shawn H Corey wrote:
>
> It seems to be picking up an extra empty string after a non-zero length
> match.
>
Thanks John and Shawn.
Yup what let me be confused is that, why there is an additional empty
string there?
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Orchid Fairy (兰花仙子) wrote:
> Hi,
>
> # perl -le '$_="aXXXb"; print "one word is $1" while(/(X*)/g);'
> one word is
> one word is XXX
> one word is
> one word is
>
>
> what are the three empty values in the output?
Adding pos() (see `perldoc -f pos`) shows what is happening:
$ perl -le '$_="aXX
Orchid Fairy (À¼»¨ÏÉ×Ó) wrote:
Hi,
Hello,
# perl -le '$_="aXXXb"; print "one word is $1" while(/(X*)/g);'
one word is
one word is XXX
one word is
one word is
what are the three empty values in the output?
The pattern X* can match zero characters.
$ perl -le'$_="aXXXb"; print "one word is
11 matches
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