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  1. #!/usr/bin/perl -wl
  2.  
  3. ($test = "tt") =~ /^\w(\w+)?\w+/ && print ($1) && print "'$test' authorized";
Success #stdin #stdout #stderr 0s 6000KB
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stdin
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Standard input is empty
stdout
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'tt' authorized
stderr
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Use of uninitialized value $1 in print at prog.pl line 3.
https://ideone.com/8MMftA
language:
Perl (perl 5.28.1)
created:
9 years ago
visibility:
public

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