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Ingy döt Net 2013-04-10 12:38:42 -07:00
parent 3af7344581
commit 86c034bb8b
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13
Task/Search-a-list/Perl/search-a-list-1.pl Normal file
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use List::Util qw(first);
my @haystack = qw(Zig Zag Wally Ronald Bush Krusty Charlie Bush Bozo);
foreach my $needle (qw(Washington Bush)) {
my $index = first { $haystack[$_] eq $needle } (0 .. $#haystack); # note that "eq" was used because we are comparing strings
# you would use "==" for numbers
if (defined $index) {
print "$index $needle\n";
} else {
print "$needle is not in haystack\n";
}
}

13
Task/Search-a-list/Perl/search-a-list-2.pl Normal file
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use List::MoreUtils qw(first_index);
my @haystack = qw(Zig Zag Wally Ronald Bush Krusty Charlie Bush Bozo);
foreach my $needle (qw(Washington Bush)) {
my $index = first_index { $_ eq $needle } @haystack; # note that "eq" was used because we are comparing strings
# you would use "==" for numbers
if (defined $index) {
print "$index $needle\n";
} else {
print "$needle is not in haystack\n";
}
}

13
Task/Search-a-list/Perl/search-a-list-3.pl Normal file
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my @haystack = qw(Zig Zag Wally Ronald Bush Krusty Charlie Bush Bozo);
my %haystack_indices;
@haystack_indices{ @haystack } = (0 .. $#haystack); # Caution: this finds the largest index, not the smallest
foreach my $needle (qw(Washington Bush)) {
my $index = $haystack_indices{$needle};
if (defined $index) {
print "$index $needle\n";
} else {
print "$needle is not in haystack\n";
}
}