Beefy Boxes and Bandwidth Generously Provided by pair Networks
good chemistry is complicated,
and a little bit messy -LW
 
PerlMonks  

Re: Need some help with Hashes and formatting

by farang (Chaplain)
on Jun 25, 2014 at 03:01 UTC ( #1091120=note: print w/replies, xml ) Need Help??


in reply to Need some help with Hashes and formatting

This statement
printf "%10s\t=>%10s\n" x @ky, @ky, @vals;
is first outputting all keys, then all values. Here's an alternative without the intermediate arrays, using the defined or operator // to avoid a warning on an undef value.

#!/usr/bin/env perl use strict; use warnings; my %hash = ("fred" => "flintstone", "dino" => undef, "barney" => "rubble", "betty" => "rubble", ); printf "%10s\t=>%10s\n", "keys", "values"; for ( keys %hash ) { printf "%10s\t=>%10s\n", $_, $hash{$_} // ''; }

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1091120]
help
Chatterbox?
[karlgoethebier]: BOILED!
[karlgoethebier]: OK, at least a cool song: https://www. youtube.com/watch? v=jU4caMqKssg

How do I use this? | Other CB clients
Other Users?
Others about the Monastery: (9)
As of 2017-10-21 15:08 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    My fridge is mostly full of:

















    Results (270 votes). Check out past polls.

    Notices?