Question

Perl noob here – i have the following script

if(substr($pc, 3,1)!=" "){
       $newpc = substr($pc, 0, 4) . " " . substr($pc, 4);
}

It’s designed to put a space in postcodes, for example NN141NJ becomes NN14 1NJ… however with postcodes such as NN102DE it doesn’t do anything, does Perl recognize " " and "0" as the same? How can I go about perl not ignoring strings with 0 as the fourth letter?

Answer 1

Use ne instead of !=. The latter is for numeric comparisons, in which both are 0 in your case. See perldoc perlop