comment on

Thank you. That adapts:

sub f {
    my( $n, $g, $m ) = @_;
    $n % $g + $g * int(($m - $n) / $g);
};;
[download]

to every situation I can think I might need:

[0] Perl> print join ' ', map f( $_, 8, 15 ), 0 .. 15;;
8 9 10 11 12 13 14 15 0 1 2 3 4 5 6 7

[0] Perl> print join ' ', map f( $_, 4, 15 ), 0 .. 15;;
12 13 14 15 8 9 10 11 4 5 6 7 0 1 2 3

[0] Perl> print join ' ', map f( $_, 2, 15 ), 0 .. 15;;
14 15 12 13 10 11 8 9 6 7 4 5 2 3 0 1

[0] Perl> print join ' ', map f( $_, 1, 15 ), 0 .. 15;;
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

[0] Perl> print join ' ', map f( $_, 12, 23 ), 0 .. 23;;
12 13 14 15 16 17 18 19 20 21 22 23 0 1 2 3 4 5 6 7 8 9 10 11

[0] Perl> print join ' ', map f( $_, 8, 23 ), 0 .. 23;;
16 17 18 19 20 21 22 23 8 9 10 11 12 13 14 15 0 1 2 3 4 5 6 7

[0] Perl> print join ' ', map f( $_, 6, 23 ), 0 .. 23;;
18 19 20 21 22 23 12 13 14 15 16 17 6 7 8 9 10 11 0 1 2 3 4 5

[0] Perl> print join ' ', map f( $_, 4, 23 ), 0 .. 23;;
20 21 22 23 16 17 18 19 12 13 14 15 8 9 10 11 4 5 6 7 0 1 2 3

[0] Perl> print join ' ', map f( $_, 2, 23 ), 0 .. 23;;
22 23 20 21 18 19 16 17 14 15 12 13 10 11 8 9 6 7 4 5 2 3 0 1

[0] Perl> print join ' ', map f( $_, 1, 23 ), 0 .. 23;;
23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
[download]

Even the basket cases:

[0] Perl> print join ' ', map f( $_, 9, 26 ), 0 .. 26;;
18 19 20 21 22 23 24 25 26 9 10 11 12 13 14 15 16 17 0 1 2 3 4 5 6 7 8

[0] Perl> print join ' ', map f( $_, 6, 26 ), 0 .. 26;;
24 25 26 21 22 23 18 19 20 15 16 17 12 13 14 9 10 11 6 7 8 3 4 5 0 1 2

[0] Perl> print join ' ', map f( $_, 3, 26 ), 0 .. 26;;
24 25 26 21 22 23 18 19 20 15 16 17 12 13 14 9 10 11 6 7 8 3 4 5 0 1 2
[download]

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.

"Science is about questioning the status quo. Questioning authority". I'm with torvalds on this

In the absence of evidence, opinion is indistinguishable from prejudice. Agile (and TDD) debunked

In reply to Re^2: More simple math. by BrowserUk
in thread More simple math. by BrowserUk

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