Dave's Brain

Browse - programming tips - perl convert array to hash

Date: 2011aug25
Language: perl

Q.  How can I quickly convert an array to a hash?

A.  Use grep like this:

	my @a = qw(one two three four);
	my %h;

	grep { $h{$_} = 1 } @a;		# Convert to hash

	# Now its easy to see if something is a in the array
	if (exists $h{three}) {
		print "Yes, three is present\n";
	}

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