Perl Skills Test

© 2005 A.P. Lawrence

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Medium

How many "foo "'s will be printed by this code?

#!/usr/bin/perl
my $a;

print "foo " if (defined($a) == defined($b)) ;
my $b="";
print "foo " if (defined($a) == defined($b)) ;
print "foo " if ($a == $b) ;
print "foo " if ($a eq $b) ;

• Four
• Three
• Two
• One
• None

Answer

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