Perl
Say you have more than one array that you want to loop through at the same time, pulling out the same row index from each per cycle through the loop. One way would need to loop over each index number: for my $I (0 .. $#arrayA) { my $firstVal = $arrayA[$I]; my
Perl
What does use strict; in Perl really get you? By default three things, which can be specified separately or turned off separately: # All on by default when using use strict; use strict "vars"; use strict "subs"; use strict "refs"; # One or more can be turned off if need be no
Perl
Usually when you access a hash you get a single scalar value back, but it's also possible to get an array of values back - a slice of the hash. To do this all you have to do is pass in an array of keys, rather then a single key,
Perl
The following will return a random key from the top level hash (in this case foo or bar) which is then used to grab a value from the second level hash: my %hash = ( foo => { x => "0", y => "1" }, bar => { x => "2", y => "3" } ); print $hash # reference to the top level