RegEx to remove leading zeros from a hex number

Karger78 has asked for the wisdom of the Perl Monks concerning the following question:

Replies are listed 'Best First'.
Re: RegEx to remove leading zeros from a hex number by toolic (Bishop) on May 16, 2011 at 20:51 UTC
One way is to use sprintf and hex: `use warnings; use strict; for (qw(00ab 005 5 000 0)) { my $nz = sprintf '%x', hex; print "$_ ---> $nz\n"; } __END__ 00ab ---> ab 005 ---> 5 5 ---> 5 000 ---> 0 0 ---> 0` [download]	[reply] [d/l]
Re: RegEx to remove leading zeros from a hex number by ikegami (Patriarch) on May 16, 2011 at 20:54 UTC
`s/^0+(?=.)//s` [download]	[reply] [d/l]
Re: RegEx to remove leading zeros from a hex number by JavaFan (Canon) on May 16, 2011 at 20:35 UTC
`$var =~ s/^0+//g;` It even works on other strings not containing hex numbers!	[reply] [d/l]
Re^2: RegEx to remove leading zeros from a hex number by toolic (Bishop) on May 16, 2011 at 20:52 UTC
... and gets rid of all zeros. D'oh! `use warnings; use strict; my $var = '0000'; $var =~ s/^0+//g; print ">>>$var<<<\n"; __END__ >>><<<` [download]	[reply] [d/l]
Re^3: RegEx to remove leading zeros from a hex number by JavaFan (Canon) on May 16, 2011 at 21:24 UTC
Well, yes. Removing the leading zeros from a string containing only zeros leaves zero zeros. What you do you think should happen? Leaving a string with leading zeros, or a string containing non-zeros? Neither seems to be correct.	[reply]
Re^4: RegEx to remove leading zeros from a hex number by Anonymous Monk on May 17, 2011 at 00:24 UTC
Re: RegEx to remove leading zeros from a hex number by John M. Dlugosz (Monsignor) on May 17, 2011 at 10:19 UTC
I just did that in a text editor. I replaced s/0x0/0x/ and re-ran until it reported zero replacements.	[reply]
Re: RegEx to remove leading zeros from a hex number by Anonymous Monk on May 19, 2016 at 11:16 UTC
s/^0+(.+)//s This one even capture if the input is 000 o/p-0	[reply]