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course 1.0.1.8

Subroutines and Special Variables

$_; other special variables; introduction to subroutines; passing arguments; @_; named arguments; call context

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Subroutines and Special Variables

Martin Krzywinski


#!/usr/local/bin/perl

$\ = "\n";
$, = " ";

$x = simulate_failure();
print "failure scalar x" if ! defined $x;

@x = simulate_failure();
print "failure array x" if ! defined @x;

sub simulate_failure {
    return;
}

6 | Subroutines and Special Variables | 1.0.1.8.6

1.0.1.8.6.c1 | loop-01 | Martin Krzywinski | code

1.0.1.8.6.c2 | loop-02 | Martin Krzywinski | code

1.0.1.8.6.c3 | loop-03 | Martin Krzywinski | code

1.0.1.8.6.c4 | loop-04 | Martin Krzywinski | code

1.0.1.8.6.c5 | sub-01 | Martin Krzywinski | code

1.0.1.8.6.c6 | sub-02 | Martin Krzywinski | code

1.0.1.8.6.a1 | Subroutines and Special Variables | Martin Krzywinski | pdf

1.0.1.8.6.p1 | Subroutines and Special Variables | Martin Krzywinski | ppt

1.0.1.8.6.s1 | Subroutines and Special Variables | Martin Krzywinski | slides