Re: How to Remove Commas ?

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Re^2: How to Remove Commas ? by allendevans (Initiate) on Mar 27, 2012 at 13:05 UTC
ramlight, Thanks for your post! I'm having the best success with your suggestion, some others caused perl to crash. :( I pasted the snippet into my script ... `# while not eof # ============= while ($line = <INPUT>) { ($date, $time, $ampm, $filesize, $filename) = split(" ", $line); # remove commas from $filesize string # =================================== $filesize =~ s/,//;` [download] and it successfully removed the first comma. (below) Results from gnome-terminal: `1572,727,014 IN11-135.E01 1223 IN11-135.E01.txt 1572,694,696 IN11-135.E02 1572,740,428 IN11-135.E03 1572,785,002 IN11-135.E04 1572,696,748 IN11-135.E05 1572,745,871 IN11-135.E06 1572,737,726 IN11-135.E07 1572,785,459 IN11-135.E08 1572,777,135 IN11-135.E09 1572,751,922 IN11-135.E10 1572,684,462 IN11-135.E11 1556,456,660 IN11-135.E12 Total Files: 13 Avg Size: 0` [download] The first comma was removed from each number. Now I'm off to perldoc.perl.org to see how I can remove the remaining commas. Thanks ... Allen.	[reply] [d/l] [select]
Re^3: How to Remove Commas ? by tobyink (Canon) on Mar 27, 2012 at 14:06 UTC
The first comma was removed from each number. The `s///` operator by default removes only the first match. So: `my $var = "foobarfoobaz"; $var =~ s/foo//; say $var; # says "barfoobaz"` [download] There are various flags you can include to alter its default behaviour though. One of the most useful is the "g" (global) flag... `my $var = "foobarfoobaz"; $var =~ s/foo//g; say $var; # says "barbaz"` [download] Note that the slashes may be replaced with other characters, so you could equally write: `my $var = "foobarfoobaz"; $var =~ s@foo@@g; say $var; # says "barbaz"` [download] Or even: `my $var = "foobarfoobaz"; $var =~ s{foo}{}g; say $var; # says "barbaz"` [download] ... which some people might find more readable. Though note that there are a handful of characters (hash, question mark and single quote spring to mind) that trigger special behaviours here (perlop has more details). `perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'`	[reply] [d/l] [select]
Re^3: How to Remove Commas ? by johngg (Canon) on Mar 27, 2012 at 13:53 UTC
Have another read of the answer roboticus gave you, paying particular attention to the 'g' flag of the substitution. Cheers, JohnGG	[reply]


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