Integer to Money format

vinoth.ree has asked for the wisdom of the Perl Monks concerning the following question:

Hi Monks

I have a integer number that should be represented as money format

Example:

INPUT:

4123456789

OUTPUT:

4,12,34,56,789

How to do it in regular expression?

The input length may increase!

Comment on Integer to Money format

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Re: Integer to Money format by happy.barney (Friar) on Jan 20, 2011 at 07:00 UTC
`my $n = '4123456789'; $n =~ s/(?<= \d )(?= (?:\d{2})* \d{3} $ )/,/gx;` [download]	[reply] [d/l]
Re^2: Integer to Money format by vinoth.ree (Monsignor) on Jan 20, 2011 at 08:13 UTC
Thank you very much!	[reply]
Re: Integer to Money format by toolic (Bishop) on Jan 20, 2011 at 13:45 UTC
Whenever I see "format" and "number", I think of... Number::Format :) `use warnings; use strict; use Number::Format qw(format_picture); print format_picture(4123456789, '##,##,##,##,##,##,###'), "\n"; __END__ 4,12,34,56,789` [download] You could consider this as an alternative to regular expressions. One disadvantage is that `format_picture` forces you to know the upper bound on your number's length.	[reply] [d/l] [select]
Re^2: Integer to Money format by tilly (Archbishop) on Jan 20, 2011 at 16:05 UTC
I don't. But then again I'm unfairly biased for reasons that I explained at Re (tilly) 2: decimal placement.	[reply]
Re: Integer to Money format by lyklev (Pilgrim) on Jan 20, 2011 at 08:06 UTC
That does not look like money format. The output would be 4,123,456,789 and possibly followed by a period and two digits for cents.	[reply]
Re^2: Integer to Money format by CountZero (Bishop) on Jan 20, 2011 at 09:59 UTC
It is the Indian way of formatting money amounts. See: Indian Numbering System CountZero A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James	[reply]
Re^3: Integer to Money format by lyklev (Pilgrim) on Jan 20, 2011 at 11:54 UTC
Learned something today, thanks!	[reply]
Re: Integer to Money format by chrestomanci (Priest) on Jan 20, 2011 at 09:04 UTC
Was that a homework question? It looks a bit contrived to do it as a regular expression, when there alternative ways of inserting commas every three digits. For example: `join(',', '4123456789' =~ m/.{3}/g )` [download]	[reply] [d/l]
Re^2: Integer to Money format by happy.barney (Friar) on Jan 20, 2011 at 09:27 UTC
did you mean something like this ? :-) `scalar reverse join(',', (reverse '4123456789') =~ m/.{1,3}/g);` [download]	[reply] [d/l]
Re^2: Integer to Money format by Anonymous Monk on Jan 20, 2011 at 09:34 UTC
Maybe :\| its probably an interview question, or its a social experiment, or a shared intern account	[reply]
Re: Integer to Money format by sundialsvc4 (Abbot) on Jan 20, 2011 at 15:05 UTC
When faced with a problem like that, I write a `sub` to do it. I fill that subroutine with comments, and I write the routine to be Perfectly Clear. Not Fast, not Short, and especially not Clever.	[reply]
Re^2: Integer to Money format by Anonymous Monk on Jan 20, 2011 at 15:07 UTC
Oh really? Is that what You Do?	[reply]

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