Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl Monk, Perl Meditation
 
PerlMonks  

Re: Manipulating data from a file

by tobyink (Abbot)
on Dec 06, 2012 at 09:01 UTC ( #1007502=note: print w/ replies, xml ) Need Help??


in reply to Manipulating data from a file

The maths part isn't especially tricky...

use 5.010; use strict; use warnings; # This expression is used to test if a string consists of a single # digit. We use it a couple of different places, so we'll just define # it once as a constant. # use constant DIGIT => qr/^[0-9]$/; # Let's assume you already have the date in an all numeric format. # say digit_sum('01-06-1980'); # This is the function which adds digits # sub digit_sum { my $string = shift; # First, split into digits. my @digits = grep { $_ =~ DIGIT } # keep only the numeric characters split '', $string; # split into characters # Add the digits together. my $sum = 0; $sum += $_ for @digits; # Handle the trivial case. # If $sum is just a single digit, return it as-is. return $sum if $sum =~ DIGIT; # Otherwise, recurse. return digit_sum($sum); }
perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'


Comment on Re: Manipulating data from a file
Download Code

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1007502]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others scrutinizing the Monastery: (6)
As of 2014-09-01 11:16 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    My favorite cookbook is:










    Results (5 votes), past polls