Prev: regex inserting a - for every third digit in a number from rightto left
Next: FAQ 3.12 Where can I get perl-mode or cperl-mode for emacs?
From: Tad McClellan on 16 Jul 2010 15:10
lennie <erling.kopperdal(a)lyse.net> wrote:
> Hi group!
>
> Apologies if this is trvial for you, but I try to construct a s/ / /g that
> will insert a - for every third digit in a number from right to left, ie:
> 123456 -> 123-456
> 1234567 -> 1-234-567
> 123 -> 123 (no - as first char)


Start with

perldoc -q comma

How can I output my numbers with commas added?


then:

-----------------
#!/usr/bin/perl
use warnings;
use strict;

foreach my $before qw(123456 1234567 123) {
my $after = $before;
1 while $after =~ s/^([-+]?\d+)(\d{3})/$1-$2/;
print "$before -> $after\n";
}
-----------------


--
Tad McClellan
email: perl -le "print scalar reverse qq/moc.liamg\100cm.j.dat/"
The above message is a Usenet post.
I don't recall having given anyone permission to use it on a Web site.
 | 
Pages: 1
Prev: regex inserting a - for every third digit in a number from rightto left
Next: FAQ 3.12 Where can I get perl-mode or cperl-mode for emacs?