[PerlChina] split function and zero-width seperator

[cnhack TNT]

Just remove the "grep !/^\s*$/," statement will give you what you want. :-)


2009/10/23 tiger peng <tigerpeng2001 at yahoo.com>

> Here is what I want:
>
> :-) perl -MData::Dumper -MRegexp::Common -le '$a="15678.91 ml; .121
> 0.12312  >
> $VAR1 = [
>           '15678.91',
>           ' ml; ',
>           '.121',
>           ' ',
>           '0.12312',
>           '  ',
>           '12313.',
>           ' r',
>           '45.12',
>           ' '
>         ];
>
>
>
>  ------------------------------
> *From:* tiger peng <tigerpeng2001 at yahoo.com>
> *To:* china-pm at pm.org
> *Sent:* Thu, October 22, 2009 9:59:15 PM
>
> *Subject:* Re: [PerlChina] split function and zero-width seperator
>
>  Thank. I thought the seperator would lost. I just read perldoc -f split,
> which says, "If the PATTERN contains parentheses, additional list elements
> are created from each matching substring in the delimiter."
>
>  ------------------------------
> *From:* cnhack TNT <cnhacktnt at gmail.com>
> *To:* china-pm at pm.org
> *Sent:* Thu, October 22, 2009 7:57:37 PM
> *Subject:* Re: [PerlChina] split function and zero-width seperator
>
> perl -MData::Dumper -le '$a="15678.91 ml; r45.12 "; @a=grep !/^\s*$/, split
> /([\d\.]+)/, $a; print Dumper  \@a'
>
> the regex pattern for split don't need to be that complicated. :-)
>
>
>
> 2009/10/23 tiger peng <tigerpeng2001 at yahoo.com>
>
>>  Hello everyone,
>>
>> I am trying to isolate numbers from string, manipulate the numbers then
>> put them back to original positions in the string. When I try to use
>> zero-width separator, the split function looks weird, it generated much more
>> elements than I expect.
>>
>> Are there any mistakes? Why the split behaviors like this? (The
>> regexp looks right when I used it s///)
>>
>> Could anyone help?
>>
>> Thanks,
>> Tiger
>>
>> #build the seperator
>> :-) perl -le '$a = "15678.91 ml; r45.12 ";
>>               $a =~
>> s/((?!(\d|\.))(?<=(\d|\.)))|((?=(\d|\.))(?<!(\d|\.)))/|/g;
>>               print $a'
>> |15678.91| ml; r|45.12|
>>
>> #use the seperator in split
>> :-) perl -MData::Dumper -le '$a = "15678.91 ml; r45.12 ";
>>                              @a = split
>> /((?!(\d|\.))(?<=(\d|\.)))|((?=(\d|\.))(?<!(\d|\.)))/, $a;
>>                              print Dumper(@a)'
>> $VAR1 = '15678.91';
>> $VAR2 = '';
>> $VAR3 = undef;
>> $VAR4 = '1';
>> $VAR5 = undef;
>> $VAR6 = undef;
>> $VAR7 = undef;
>> $VAR8 = ' ml; r';
>> $VAR9 = undef;
>> $VAR10 = undef;
>> $VAR11 = undef;
>> $VAR12 = '';
>> $VAR13 = '4';
>> $VAR14 = undef;
>> $VAR15 = '45.12';
>> $VAR16 = '';
>> $VAR17 = undef;
>> $VAR18 = '2';
>> $VAR19 = undef;
>> $VAR20 = undef;
>> $VAR21 = undef;
>> $VAR22 = ' ';
>>
>> _______________________________________________
>> China-pm mailing list
>> China-pm at pm.org
>> http://mail.pm.org/mailman/listinfo/china-pm
>>
>
>
> _______________________________________________
> China-pm mailing list
> China-pm at pm.org
> http://mail.pm.org/mailman/listinfo/china-pm
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.pm.org/pipermail/china-pm/attachments/20091023/03dba0b8/attachment.html>