Re^3: beginner - ordering tuples

the input file isn't in that format. i will have the values in 2 variables called $a and $b after i have parsed the line and i know $b will be higher than a for every row.

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Re^4: beginner - ordering tuples by Anonymous Monk on Nov 13, 2010 at 01:24 UTC
You might not want to use `$a` and `$b`, because those are built-in globals used by certain functions (eg sort). Assuming you're looping over each line: `my @pairs; while (<$filehandle>) { # or whatever loop construct # parse line and set $foo and $bar here # for example: chomp; my ($foo, $bar) = /(\d+)/g; # add to array push @pairs, [ $foo, $bar ]; } # sort array # NB: these are the special $a and $b, not yours @pairs = sort { $$a[0] <=> $$b[0] } @pairs;` [download]	[reply] [d/l] [select]

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Re^4: beginner - ordering tuples
by Anonymous Monk on Nov 13, 2010 at 01:24 UTC

$a

$b

Assuming you're looping over each line:

my @pairs;
while (<$filehandle>) { # or whatever loop construct
  # parse line and set $foo and $bar here

  # for example:
  chomp;
  my ($foo, $bar) = /(\d+)/g;

  # add to array
  push @pairs, [ $foo, $bar ];
}

# sort array
# NB: these are the special $a and $b, not yours
@pairs = sort { $$a[0] <=> $$b[0] } @pairs;
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[reply]
[d/l]
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