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Re: sorting an array of file names

by bobf (Monsignor)
on Dec 19, 2009 at 16:41 UTC ( #813534=note: print w/replies, xml ) Need Help??

in reply to sorting an array of file names

The default sort order is lexical. If you want a numeric sort, you need to specify a sort routine using the <=> operator (see perlop). See sort for more information.

Since your filenames have both numeric and alpha components, you will probably need to split the pieces apart before doing the comparison. The Schwartzian Transform is good for this kind of thing.

Here is one approach. Extend the sort routine as needed if you want to specify a secondary/etc sort order in the event two filenames start with the same numeric component.

use strict; use warnings; my @files = qw( 9.10.force.0.5.1LGY.pdb 29.30.force.0.5.1LGY.pdb 30.31.force.0.5.1LGY.pdb 31.32.force.0.5.1LGY.pdb 100.101.force.0.5.1LGY.pdb 101.102.force.0.5.1LGY.pdb ); my @sorted = map { $_->[0] } sort { $a->[1] <=> $b->[1] } map { [ $_, split( /\./, $_ ) ] } @files; print "$_\n" for @sorted;

Love those pdb files. :-) Lipase, huh? Interesting stuff.

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[LanX]: (Pascale path)
[Eily]: paths like that
[Discipulus]: yes Eily++ (very keen) I want to integrate my project with a 17th experiments. I want to colorize in sequence all paths
[oiskuu]: Yeah, modifry the recursive func combinations() to return not the number, but the paths themselves.
[Eily]: Discipulus I'd do that by starting from the bottom node I think. That way it can inherit the paths from the two nodes above (and so on, recursively)
[LanX]: oh I meant fixed amount
[LanX]: every path must have l left and r right edges and l and r are fixed and l+r is the height
[LanX]: simple recursive function which goes left and right till l or r are exhausted
LanX #solved

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