Beefy Boxes and Bandwidth Generously Provided by pair Networks
Your skill will accomplish
what the force of many cannot

Re: "Commifying" a number

by jreades (Friar)
on Dec 12, 2002 at 13:04 UTC ( #219312=note: print w/replies, xml ) Need Help??

in reply to "Commifying" a number

The closest that I can come, and I don't know if this fits the bill of being simpler, is this:

use strict; my $number = 1234567890; print STDOUT "In: $number\n"; my $reversed = reverse($number); print STDOUT "Reversed: $reversed\n"; my @array = split/(\d{3})/, $reversed; shift @array; print STDOUT "Array: '" . join ("' - '", @array) . "'\n"; my $out = join("", map { $_ eq '' ? ',' : reverse($_) } @array); print STDOUT "Out: " . reverse($out) . "\n"; exit 0;

This prints out:

In: 1234567890 Reversed: 0987654321 Array: '098' - '' - '765' - '' - '432' - '1' Out: 1234,567,890

Of course, this lends itself to a one-liner, and although I'm not sure if you can quite get there you can certainly reduce the number of lines. Also note that it falls flat on its face if you try to use a decimal or floating-point number.

Maybe printf/sprintf can do what you want more simply than this?

Update -- I got the right result by doing the following:

my $out = substr(reverse(join("", map { $_ eq "" ? '' : $_ . ',' } spl +it/(\d{3})/, reverse($number))), 1);

Readable? No. Usable? Barely. No while loop? Check.

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://219312]
Discipulus open a red wine bottle and ..
Discipulus adds tozzetti alle mandorle to the platter on the sideboard.
[Discipulus]: the most monastic cookie!
[choroba]: Discipulus BTW, I loved Settembrini by Mulino Bianco years ago in Italy
[choroba]: then they stopped producing them...

How do I use this? | Other CB clients
Other Users?
Others rifling through the Monastery: (7)
As of 2017-04-27 10:32 GMT
Find Nodes?
    Voting Booth?
    I'm a fool:

    Results (503 votes). Check out past polls.