Well, I wrote this code today and I think it illustrates this style better...
Of course what these variables mean is completely out of context, but I can't imagine the horror of this expressed as nested "if's". Call it "zigzag indenting" or whatever.
For more complex "if" statements, I do think this has a certain regularity that is pleasing to the eye. Mileage varies.
print if ( exists ($noBye4Call{$rCall} )
and ($rNr > 10 )
and ($GP{STATUS} eq 'G' )
and ($GP{SCORE} eq 'BYE') );
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