Appears not to work if there's a decimal '.' ? Or a sign ?
Just for the hell of it:
use strict ; use warnings ;
foreach my $t (1234567, 123.4567, -123456, .123456, '.1234567', -10*
+*1000) {
printf "%12s -> oko1:%12s, faq:%12s\n", $t, commify($t), commify_f
+aq($t) ;
} ;
sub commify {
my ($s) = @_ ;
my @list = () ;
my $c = 0 ;
for (reverse split //, $s){
unshift @list, $c++ % 3 || $c == 1 ? $_ : "$_,";
} ;
return join '', @list ;
} ;
sub commify_faq {
local $_ = shift ;
1 while s/^([-+]?\d+)(\d{3})/$1,$2/ ;
return $_ ;
} ;
gives:
1234567 -> oko1: 1,234,567, faq: 1,234,567
123.4567 -> oko1: 12,3.4,567, faq: 123.4567
-123456 -> oko1: -,123,456, faq: -123,456
0.123456 -> oko1: 0.,123,456, faq: 0.123456
.1234567 -> oko1: .1,234,567, faq: .1234567
-inf -> oko1: -,inf, faq: -inf
which, from a pedagogical stand point, may be useful in itself :-)
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