in reply to Split on regex, don't match partial regex

Hi,

There are more than one id tag and url in the example you gave.
Let's take the example you gave as one line as it arrives as given in the OP. Please note that how those line(s) are inputted (or arrives to use your words) into the perl script was not shown.
You can do like so: 

use warnings;
use strict;

my $line =
'itag=44&url=http://o-o---preferred---sn-u5a3u5a3-h5oe---v13---lscache
+3.c.youtube.com/videoplayback?upn=8kbZJLkF5PA&sparams=cp%2Cid%2Cip%2C
+ipbits%2Citag%2Cratebypass%2Csource%2Cupn%2Cexpire&fexp=927101%2C9230
+06%2C922401%2C920704%2C912806%2C913419%2C913546%2C913556%2C919349%2C9
+19351%2C925109%2C919003%2C920201%2C912706&key=yt1&expire=1348823962&i
+tag=44&ipbits=8&sver=3&ratebypass=yes&mt=1348800611&ip=92.22.37.231&m
+v=m&source=youtube&ms=au&cp=U0hTTVhNUV9LTENOM19QR1VKOkFyQWNVSVFNbmNL&
+id=1100a4b92b939cd6&type=video/webm;+codecs="vp8.0,+vorbis"&fallback_
+host=tc.v13.cache3.c.youtube.com&sig=8353F6329CDA8168C4F7F29E20F2AE3F
+6509D85F.C582D63C02534232CE8E28D5ADC5B119AAEF2963&quality=large,itag=
+35&url=http://o-o---preferred---sn-u5a3u5a3-h5oe---v11---lscache4.c.y
+outube.com/videoplayback?upn=8kbZJLkF5PA&sparams=algorithm%2Cburst%2C
+cp%2Cfactor%2Cid%2Cip%2Cipbits%2Citag%2Csource%2Cupn%2Cexpire&fexp=92
+7101%2C923006%2C922401%2C920704%2C912806%2C913419%2C913546%2C913556%2
+C919349%2C919351%2C925109%2C919003%2C920201%2C912706&expire=134882396
+2&algorithm=throttle-factor&burst=40&ip=92.22.37.231&itag=35&sver=3&k
+ey=yt1&mt=1348800611&mv=m&source=youtube&ms=au&ipbits=8&factor=1.25&c
+p=U0hTTVhNUV9LTENOM19QR1VKOkFyQWNVSVFNbmNL&id=1100a4b92b939cd6&type=v
+ideo/x-flv&fallback_host=tc.v11.cache4.c.youtube.com&sig=885C9C098DF9
+D80E780177E01CF944BC4F9564FE.9A374618A2BE8C2E562C8622DCB449A7071E37BD
+&quality=large,itag= ...AND SO ON';

if ( my @arr = ($line) =~ m/itag=(.+?)&url=(.+?=large)/ig ) {
    print join "\n" => @arr;
}

[download]

Output
44
http://o-o---preferred---sn-u5a3u5a3-h5oe---v13---lscache3.c.youtube.c
+om/videoplayback?upn=8kbZJLkF5PA&sparams=cp%2Cid%2Cip%2Cipbits%2Citag
+%2Cratebypass%2Csource%2Cupn%2Cexpire&fexp=927101%2C923006%2C922401%2
+C920704%2C912806%2C913419%2C913546%2C913556%2C919349%2C919351%2C92510
+9%2C919003%2C920201%2C912706&key=yt1&expire=1348823962&itag=44&ipbits
+=8&sver=3&ratebypass=yes&mt=1348800611&ip=92.22.37.231&mv=m&source=yo
+utube&ms=au&cp=U0hTTVhNUV9LTENOM19QR1VKOkFyQWNVSVFNbmNL&id=1100a4b92b
+939cd6&type=video/webm;+codecs="vp8.0,+vorbis"&fallback_host=tc.v13.c
+ache3.c.youtube.com&sig=8353F6329CDA8168C4F7F29E20F2AE3F6509D85F.C582
+D63C02534232CE8E28D5ADC5B119AAEF2963&quality=large
35
http://o-o---preferred---sn-u5a3u5a3-h5oe---v11---lscache4.c.youtube.c
+om/videoplayback?upn=8kbZJLkF5PA&sparams=algorithm%2Cburst%2Ccp%2Cfac
+tor%2Cid%2Cip%2Cipbits%2Citag%2Csource%2Cupn%2Cexpire&fexp=927101%2C9
+23006%2C922401%2C920704%2C912806%2C913419%2C913546%2C913556%2C919349%
+2C919351%2C925109%2C919003%2C920201%2C912706&expire=1348823962&algori
+thm=throttle-factor&burst=40&ip=92.22.37.231&itag=35&sver=3&key=yt1&m
+t=1348800611&mv=m&source=youtube&ms=au&ipbits=8&factor=1.25&cp=U0hTTV
+hNUV9LTENOM19QR1VKOkFyQWNVSVFNbmNL&id=1100a4b92b939cd6&type=video/x-f
+lv&fallback_host=tc.v11.cache4.c.youtube.com&sig=885C9C098DF9D80E7801
+77E01CF944BC4F9564FE.9A374618A2BE8C2E562C8622DCB449A7071E37BD&quality
+=large

[download]
If then you need put your data in an hash, you could simply just do 
 my %hash_contain;
  
  if(...){
    ...
   %hash_contain = @arr;
  }

[download]
Since, you will always have itag ids and urls(except otherwise, which was not told us), then your hash look like so: 

  35 => ...,
  44 => ...,

[download]
Hope this helps.

If you tell me, I'll forget.
If you show me, I'll remember.
if you involve me, I'll understand.
--- Author unknown to me

Replies are listed 'Best First'.
Re^2: Split on regex, don't match partial regex
by aldo (Initiate) on Sep 28, 2012 at 08:18 UTC

    hi thanks for the response, the data arrives as a long urlencoded string from an HTTP request to the YouTube gdata API. I've already decoded it

    Your code works, however the quality=large at the end could be quality=small quality=medium etc so I can't use that in the regex. I suppose I just need to match a pattern which is

    itag=\d{1:2}&url={any number of chars until next itag=\d{1:2}&url= pattern}

    There's also a comma separating the itag url pairs

    I hope that makes sense!

[reply]
[d/l]
      however the quality=large at the end could be quality=small quality=medium etc so I can't use that in the regex

      Use this then, it works I believe: 
      ...
if ( my @arr = ($line) =~ m/itag=(.+?)&url=(.+?=.+?)(?=,itag.+?)/ig ) 
+{
    print join "\n" => @arr;
}
...

      [download]
      OR 
      use warnings;
use strict;

while (<DATA>) {
    chomp;
    if ( my @arr = /itag=(.+?)&url=(.+?=.+?)(?=,itag.+?)/ig ) {
        print join "\n" => @arr;
    }
}

__DATA__
itag=44&url=http://o-o---preferred---sn-u5a3u5a3-h5oe---v13---lscache3
+.c.youtube.com/videoplayback?upn=8kbZJLkF5PA&sparams=cp%2Cid%2Cip%2Ci
+pbits%2Citag%2Cratebypass%2Csource%2Cupn%2Cexpire&fexp=927101%2C92300
+6%2C922401%2C920704%2C912806%2C913419%2C913546%2C913556%2C919349%2C91
+9351%2C925109%2C919003%2C920201%2C912706&key=yt1&expire=1348823962&it
+ag=44&ipbits=8&sver=3&ratebypass=yes&mt=1348800611&ip=92.22.37.231&mv
+=m&source=youtube&ms=au&cp=U0hTTVhNUV9LTENOM19QR1VKOkFyQWNVSVFNbmNL&i
+d=1100a4b92b939cd6&type=video/webm;+codecs="vp8.0,+vorbis"&fallback_h
+ost=tc.v13.cache3.c.youtube.com&sig=8353F6329CDA8168C4F7F29E20F2AE3F6
+509D85F.C582D63C02534232CE8E28D5ADC5B119AAEF2963&quality=large,itag=3
+5&url=http://o-o---preferred---sn-u5a3u5a3-h5oe---v11---lscache4.c.yo
+utube.com/videoplayback?upn=8kbZJLkF5PA&sparams=algorithm%2Cburst%2Cc
+p%2Cfactor%2Cid%2Cip%2Cipbits%2Citag%2Csource%2Cupn%2Cexpire&fexp=927
+101%2C923006%2C922401%2C920704%2C912806%2C913419%2C913546%2C913556%2C
+919349%2C919351%2C925109%2C919003%2C920201%2C912706&expire=1348823962
+&algorithm=throttle-factor&burst=40&ip=92.22.37.231&itag=35&sver=3&ke
+y=yt1&mt=1348800611&mv=m&source=youtube&ms=au&ipbits=8&factor=1.25&cp
+=U0hTTVhNUV9LTENOM19QR1VKOkFyQWNVSVFNbmNL&id=1100a4b92b939cd6&type=vi
+deo/x-flv&fallback_host=tc.v11.cache4.c.youtube.com&sig=885C9C098DF9D
+80E780177E01CF944BC4F9564FE.9A374618A2BE8C2E562C8622DCB449A7071E37BD&
+quality=large,itag=104&url=http://o-o---preferred---sn-u5a3u5a3-h5oe-
+--v13---lscache3.c.youtube.com/videoplayback?upn=8kbZJLkF5PA&sparams=
+cp%2Cid%2Cip%2Cipbits%2Citag%2Cratebypass%2Csource%2Cupn%2Cexpire&fex
+p=927101%2C923006%2C922401%2C920704%2C912806%2C913419%2C913546%2C9135
+56%2C919349%2C919351%2C925109%2C919003%2C920201%2C912706&key=yt1&expi
+re=1348823962&itag=44&ipbits=8&sver=3&ratebypass=yes&mt=1348800611&ip
+=92.22.37.231&mv=m&source=youtube&ms=au&cp=U0hTTVhNUV9LTENOM19QR1VKOk
+FyQWNVSVFNbmNL&id=1100a4b92b939cd6&type=video/webm;+codecs="vp8.0,+vo
+rbis"&fallback_host=tc.v13.cache3.c.youtube.com&sig=8353F6329CDA8168C
+4F7F29E20F2AE3F6509D85F.C582D63C02534232CE8E28D5ADC5B119AAEF2963&qual
+ity=small,itag=15&url=http://o-o---preferred---sn-u5a3u5a3-h5oe---v11
+---lscache4.c.youtube.com/videoplayback?upn=8kbZJLkF5PA&sparams=algor
+ithm%2Cburst%2Ccp%2Cfactor%2Cid%2Cip%2Cipbits%2Citag%2Csource%2Cupn%2
+Cexpire&fexp=927101%2C923006%2C922401%2C920704%2C912806%2C913419%2C91
+3546%2C913556%2C919349%2C919351%2C925109%2C919003%2C920201%2C912706&e
+xpire=1348823962&algorithm=throttle-factor&burst=40&ip=92.22.37.231&i
+tag=35&sver=3&key=yt1&mt=1348800611&mv=m&source=youtube&ms=au&ipbits=
+8&factor=1.25&cp=U0hTTVhNUV9LTENOM19QR1VKOkFyQWNVSVFNbmNL&id=1100a4b9
+2b939cd6&type=video/x-flv&fallback_host=tc.v11.cache4.c.youtube.com&s
+ig=885C9C098DF9D80E780177E01CF944BC4F9564FE.9A374618A2BE8C2E562C8622D
+CB449A7071E37BD&quality=quality=small quality=medium,itag=55&url=http
+://o-o---preferred---sn-u5a3u5a3-h5oe---v11---lscache4.c.youtube.com/
+videoplayback?upn=8kbZJLkF5PA&sparams=algorithm%2Cburst%2Ccp%2Cfactor
+%2Cid%2Cip%2Cipbits%2Citag%2Csource%2Cupn%2Cexpire&fexp=927101%2C9230
+06%2C922401%2C920704%2C912806%2C913419%2C913546%2C913556%2C919349%2C9
+19351%2C925109%2C919003%2C920201%2C912706&expire=1348823962&algorithm
+=throttle-factor&burst=40&ip=92.22.37.231&itag=35&sver=3&key=yt1&mt=1
+348800611&mv=m&source=youtube&ms=au&ipbits=8&factor=1.25&cp=U0hTTVhNU
+V9LTENOM19QR1VKOkFyQWNVSVFNbmNL&id=1100a4b92b939cd6&type=video/x-flv&
+fallback_host=tc.v11.cache4.c.youtube.com&sig=885C9C098DF9D80E780177E
+01CF944BC4F9564FE.9A374618A2BE8C2E562C8622DCB449A7071E37BD&quality=qu
+ality=small quality=medium,itag= ...AND SO ON

      [download]
      Output 
      44
http://o-o---preferred---sn-u5a3u5a3-h5oe---v13---lscache3.c.youtube.c
+om/videoplayback?upn=8kbZJLkF5PA&sparams=cp%2Cid%2Cip%2Cipbits%2Citag
+%2Cratebypass%2Csource%2Cupn%2Cexpire&fexp=927101%2C923006%2C922401%2
+C920704%2C912806%2C913419%2C913546%2C913556%2C919349%2C919351%2C92510
+9%2C919003%2C920201%2C912706&key=yt1&expire=1348823962&itag=44&ipbits
+=8&sver=3&ratebypass=yes&mt=1348800611&ip=92.22.37.231&mv=m&source=yo
+utube&ms=au&cp=U0hTTVhNUV9LTENOM19QR1VKOkFyQWNVSVFNbmNL&id=1100a4b92b
+939cd6&type=video/webm;+codecs="vp8.0,+vorbis"&fallback_host=tc.v13.c
+ache3.c.youtube.com&sig=8353F6329CDA8168C4F7F29E20F2AE3F6509D85F.C582
+D63C02534232CE8E28D5ADC5B119AAEF2963&quality=large
35
http://o-o---preferred---sn-u5a3u5a3-h5oe---v11---lscache4.c.youtube.c
+om/videoplayback?upn=8kbZJLkF5PA&sparams=algorithm%2Cburst%2Ccp%2Cfac
+tor%2Cid%2Cip%2Cipbits%2Citag%2Csource%2Cupn%2Cexpire&fexp=927101%2C9
+23006%2C922401%2C920704%2C912806%2C913419%2C913546%2C913556%2C919349%
+2C919351%2C925109%2C919003%2C920201%2C912706&expire=1348823962&algori
+thm=throttle-factor&burst=40&ip=92.22.37.231&itag=35&sver=3&key=yt1&m
+t=1348800611&mv=m&source=youtube&ms=au&ipbits=8&factor=1.25&cp=U0hTTV
+hNUV9LTENOM19QR1VKOkFyQWNVSVFNbmNL&id=1100a4b92b939cd6&type=video/x-f
+lv&fallback_host=tc.v11.cache4.c.youtube.com&sig=885C9C098DF9D80E7801
+77E01CF944BC4F9564FE.9A374618A2BE8C2E562C8622DCB449A7071E37BD&quality
+=large
104
http://o-o---preferred---sn-u5a3u5a3-h5oe---v13---lscache3.c.youtube.c
+om/videoplayback?upn=8kbZJLkF5PA&sparams=cp%2Cid%2Cip%2Cipbits%2Citag
+%2Cratebypass%2Csource%2Cupn%2Cexpire&fexp=927101%2C923006%2C922401%2
+C920704%2C912806%2C913419%2C913546%2C913556%2C919349%2C919351%2C92510
+9%2C919003%2C920201%2C912706&key=yt1&expire=1348823962&itag=44&ipbits
+=8&sver=3&ratebypass=yes&mt=1348800611&ip=92.22.37.231&mv=m&source=yo
+utube&ms=au&cp=U0hTTVhNUV9LTENOM19QR1VKOkFyQWNVSVFNbmNL&id=1100a4b92b
+939cd6&type=video/webm;+codecs="vp8.0,+vorbis"&fallback_host=tc.v13.c
+ache3.c.youtube.com&sig=8353F6329CDA8168C4F7F29E20F2AE3F6509D85F.C582
+D63C02534232CE8E28D5ADC5B119AAEF2963&quality=small
15
http://o-o---preferred---sn-u5a3u5a3-h5oe---v11---lscache4.c.youtube.c
+om/videoplayback?upn=8kbZJLkF5PA&sparams=algorithm%2Cburst%2Ccp%2Cfac
+tor%2Cid%2Cip%2Cipbits%2Citag%2Csource%2Cupn%2Cexpire&fexp=927101%2C9
+23006%2C922401%2C920704%2C912806%2C913419%2C913546%2C913556%2C919349%
+2C919351%2C925109%2C919003%2C920201%2C912706&expire=1348823962&algori
+thm=throttle-factor&burst=40&ip=92.22.37.231&itag=35&sver=3&key=yt1&m
+t=1348800611&mv=m&source=youtube&ms=au&ipbits=8&factor=1.25&cp=U0hTTV
+hNUV9LTENOM19QR1VKOkFyQWNVSVFNbmNL&id=1100a4b92b939cd6&type=video/x-f
+lv&fallback_host=tc.v11.cache4.c.youtube.com&sig=885C9C098DF9D80E7801
+77E01CF944BC4F9564FE.9A374618A2BE8C2E562C8622DCB449A7071E37BD&quality
+=quality=small quality=medium
55
http://o-o---preferred---sn-u5a3u5a3-h5oe---v11---lscache4.c.youtube.c
+om/videoplayback?upn=8kbZJLkF5PA&sparams=algorithm%2Cburst%2Ccp%2Cfac
+tor%2Cid%2Cip%2Cipbits%2Citag%2Csource%2Cupn%2Cexpire&fexp=927101%2C9
+23006%2C922401%2C920704%2C912806%2C913419%2C913546%2C913556%2C919349%
+2C919351%2C925109%2C919003%2C920201%2C912706&expire=1348823962&algori
+thm=throttle-factor&burst=40&ip=92.22.37.231&itag=35&sver=3&key=yt1&m
+t=1348800611&mv=m&source=youtube&ms=au&ipbits=8&factor=1.25&cp=U0hTTV
+hNUV9LTENOM19QR1VKOkFyQWNVSVFNbmNL&id=1100a4b92b939cd6&type=video/x-f
+lv&fallback_host=tc.v11.cache4.c.youtube.com&sig=885C9C098DF9D80E7801
+77E01CF944BC4F9564FE.9A374618A2BE8C2E562C8622DCB449A7071E37BD&quality
+=quality=small quality=medium

      [download]
      If you tell me, I'll forget.
      If you show me, I'll remember.
      if you involve me, I'll understand.
      --- Author unknown to me
[reply]
[d/l]
[select]

        Hi, and THANKS! Now the plugin is working perfectly again.

        I really do need to get better with my Perl..

[reply]

In Section Seekers of Perl Wisdom