(for keyword or further-search purposes) that behavior is dubbed "short-circuiting"

And i'll toss in a good C example (avoid method calls on undef/null): 
int *x;
if(ptr != NULL && *ptr==5){ ... }
if( objPtr != NULL && objPtr->foo() ){ ... }

# extended to perl:
my $obj = Foo::Bar->new();
if( $obj && $obj->blah() ){ ... }

[download]
Update: added parens for ->foo()

In reply to Re^2: AND OR by davidrw
in thread AND OR by hasimir44

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