I know this topic has been beaten to death, but I'm not satisfied with the code I came up with, and am looking for a neat/elegant way.
Purpose: sort a list of strings in a way that is useful to humans - so that "foo2bar" comes before "foo10bar", and so forth.
Here is my ugly code (which I think works)
sub sort_n {
return
map
{
$_->[0]
}
sort
{
my $l = @{$a->[1]} < @{$b->[1]}
? scalar @{$a->[1]}
: scalar @{$b->[1]} ;
for (my $n=0; $n<$l; $n++) {
if ( $a->[1][$n] =~ /^(\D+)$/ ) {
if ( $b->[1][$n] =~ /^(\D+)$/ ) {
my $tmp = $a->[1][$n] cmp $b ->[1][$n];
return $tmp if $tmp;
} else {
return 1;
}
} else {
if ( $b->[1][$n] =~ /^(\D+)$/ ) {
return -1;
} else {
my $tmp = $a->[1][$n] <=> $b ->[1][$n];
return $tmp if $tmp;
}
}
}
return @{$a->[1]} <=> @{$b->[1]};
}
map
{
[
$_ ,
[
# each element of @_ is split on boundaries
# between digit and nondigit
split (
/(?:(?<=\d)(?=\D))|(?:(?<=\D)(?=\d))/,
$_
)
]
]
}
@_;
}
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