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course 1.0.1.8

Lists, Arrays and Context

Introduction to lists and arrays; manipulating arrays; scalar vs array context. BCCRC Lecture theatre.

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level: advanced advanced ( 3 )

[ consider using for instead of foreach ]

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Lists, Arrays and Context

Martin Krzywinski


#!/usr/local/bin/perl

use Data::Dumper;

# new line at the end of each print, automatically
$\ = "\n";

@x = ();

$x[0] = 1;
$x[1] = 2;
$x[-1] = 3;

print Dumper(\@x);

$x[3] = 4;

print Dumper(\@x);

@y = ();
$y[5] = 5;

print Dumper(\@y);

@z = (1..5);

@w = (1..5);

print $#w;

$#w = 5;
print Dumper(\@w);

$#w = 3;
print Dumper(\@w);

$#w = 5;
print Dumper(\@w);

print a..z;

3 | Lists, Arrays and Context | 1.0.1.8.3

1.0.1.8.3.p1 | Lists, Arrays and Context | Martin Krzywinski | ppt

1.0.1.8.3.c1 | grow | Martin Krzywinski | code

1.0.1.8.3.c2 | iteration | Martin Krzywinski | code

1.0.1.8.3.c3 | pop | Martin Krzywinski | code

1.0.1.8.3.c4 | push | Martin Krzywinski | code

1.0.1.8.3.c5 | swap | Martin Krzywinski | code

1.0.1.8.3.a1 | Lists, Arrays and Context | Martin Krzywinski | pdf

1.0.1.8.3.s1 | Lists, Arrays and Context | Martin Krzywinski | slides