f99aq8ove (owner)

Revisions

gist: 5103 Download_button fork
public
Description:
seq implementation in perl
Public Clone URL: git://gist.github.com/5103.git
Embed All Files: show embed
seq.pl #
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#!/usr/bin/env perl
use strict;
use warnings;
 
my @args = @ARGV;
my %opt;
 
$opt{f} = '%g';
 
foreach (@args) {
    if ($_ =~ /^-(\D)$/) {
        shift @args;
        $opt{$1} = shift @args;
    }
    else {
        last;
    }
}
 
my ($first, $increment, $last) = (1, 1, 1);
if (scalar @args == 1) {
    $last = $args[0];
}
elsif (scalar @args == 2) {
    $first = $args[0];
    $last  = $args[1];
}
elsif (scalar @args == 3) {
    $first     = $args[0];
    $increment = $args[1];
    $last      = $args[2];
}
else {
    die 'invalid argument(s)';
}
 
for (
    my $i = $first;
    ($increment > 0) ? $i <= $last : $i >= $last;
    $i += $increment
    )
{
    printf "$opt{f}\n", $i;
}
 
seq.t #
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#!/usr/bin/env perl
use strict;
use warnings;
use Test::Base;
 
plan tests => 1 * blocks;
 
my $target = $ENV{SEQ_COMMAND};
 
filters {
    input    => [qw/chomp make_cmd_str exec_perl_stdout/],
    expected => [qw//],
};
 
sub make_cmd_str {
    return "system '$target @_'";
}
 
run_is_deeply;
 
__END__
 
=== 1 arg (seq 0)
--- input
0
--- expected
 
=== 1 arg (LAST)
--- input
1
--- expected
1
 
=== 1 arg (seq 10)
--- input
10
--- expected
1
2
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7
8
9
10
 
=== 2 args (FIRST LAST)
--- input
1 10
--- expected
1
2
3
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5
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7
8
9
10
 
=== 3 args (FIRST INCREMENT LAST)
--- input
1 2 5
--- expected
1
3
5
 
=== negative start (seq -10 0)
--- input
-10 0
--- expected
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
 
=== null return (seq 10 1)
--- input
10 0
--- expected
 
=== null return (seq -1 -2)
--- input
-1 -2
--- expected
 
=== only 0
--- input
0 0
--- expected
0
 
=== null return (seq -1 -1 1)
--- input
-1 -1 1
--- expected
 
=== 10 to 1
--- input
10 -1 1
--- expected
10
9
8
7
6
5
4
3
2
1
 
=== -1 3 10
--- input
-1 3 10
--- expected
-1
2
5
8
 
=== 10 -4 -2
--- input
10 -4 -2
--- expected
10
6
2
-2
 
=== format
--- input
-f %02g 0 10 100
--- expected
00
10
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100
 
 
seq_error.t #
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#!/usr/bin/env perl
use strict;
use warnings;
use Test::More;
 
plan tests => 2;
 
isnt system($ENV{SEQ_COMMAND}), 0, 'no argumant';
isnt system("$ENV{SEQ_COMMAND} 1 1 1 1"), 0, '4 argumants';