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Re^2: Removing chars from a word from an array

by blazar (Canon)
on Jan 24, 2006 at 16:20 UTC ( #525226=note: print w/replies, xml ) Need Help??

in reply to Re: Removing chars from a word from an array
in thread Removing chars from a word from an array

my @list= qw(a b c a c); my $w="kandabbbc"; while (my $a=shift(@list)) { $w=~s/\Q$a//; @list = grep {!/\Q$a/} @list; } print $w;

OMG! while and grep to iterate over @list... ok, TMTOWTDI, but then how 'bout a for loop? Also, who told you that @list has duplicates? In any case, if so, then a technique a la'

my %saw; for (@list) { next if $saw{$_}++; # ... }

would suffice. Also, don't you think s///g would be better suited to remove chars from his string?

Incidentally to remove charachters, the best tool would be tr///d a.k.a y///d, but unfortunately it does not interpolate - I don't know if it would be worth to use the usual eval trick to work around this limitation. The OP may still want to know just in case he really knew @list in advance and did not need to delete chars dinamically.

my @list= qw(a b c a c); my $re = join '|', @list;

How 'bout using a charachter class instead? That is:

my $re=join "", @list; $re="[$re]";

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