Sequences - Xref - Builds - loop

<p>{sequence '1..8'}{$sequence} {/sequence}</p>
<p>{sequence fibonacci, rows=8}{$sequence} {/sequence}</p>
<p>{sequence prime, from=10, rows=6}{$sequence} {/sequence}</p>
<p>{sequence 'A..F'}{$sequence} {/sequence}</p>

<table border='1'>
  {sequence 3}
    <tr>
      {sequence 5}
        <td>{echo ($-2 * 10) + $-1}</td>      
      {/sequence}
    </tr>
  {/sequence}
</table>

<p>
  {block}
    PAD is data driven, the PAD data concepts are named Level and Occurence
    <br><br>
    Below example: <br>
    - Is two levels deep <br>
    - The level 'row' has 3 occurences<br>
    - The level 'column' has 5 occurences<br><br>
  {/block}
  {example 'lvl_occ/1', skipNames, center}
</p>

{block}
  If not specifield for a PAD tag then default it has 1 occurence.
  <br><br><hr><br>
  Just for fun, below the above example implemented in a few different ways.
  <br>
  Hopefully all this magic will be explained in this manual.
{/block}

<p> 
{sequence '2..12', name='xxx'}
  {example 'lvl_occ/{$xxx}', skipNames{notFirst},skipOpen,skipHeader{/notFirst}{notLast},skipClose{/notLast}}
{/sequence}
</p>

{meta title='Sequences'}

<p>The <code>{sequence}</code> tag generates values instead of reading them: a
range, a mathematical series, letters - 122 types, each iterated like any data
tag:</p>

{example 'fragments/sequences_1'}

<p>That is the smallest corner of a whole subsystem: plays that keep, remove or flag terms,
stores that pass a sequence from one tag to the next, actions that transform it, and random
draws with their own rules. It has an application of its own, which is its manual:</p>

<p><b><a href="{$padHost}sequence/">The sequence application</a></b> - every type, play,
action and option, demonstrated live.</p>
<h2>Seeing and hearing them</h2>

<p>A sequence is data like any other, so {tag 'chart'} and {tag 'sparkline'} draw it
straight away with <code>sequence=</code>:</p>

{example 'fragments/sequences_2'}

<p>The sequence application has three pages built on that: the
<a href="{$padHost}sequence/?gallery">Gallery</a> draws every type beside the OEIS entry its
terms come from, <a href="{$padHost}sequence/?listen">Listen</a> plays a sequence as notes -
Recamán's is the famous one - in an audio file written into the page, and
<a href="{$padHost}sequence/?guess">Guess</a> shows the start of a sequence and asks for the
next term.</p>

<?php

  // Only a literal parameter of the eval sequence is an expression the template wrote: the
  // value spliced into sequence:repeat(2, '...') was taken for one, and sequence:eval(2, $q),
  // refused on its own, then ran the same value from the request.

  $q = '0 + php:abs(-3)';

?>

{echo sequence:repeat(2, '{$q}')}{echo sequence:eval(2, $q)}

{sequence 5, push='s'}{pull:s make, prime, build='fixed'}{$sequence} {/pull:s}

{sequence 5, push='x'}{resume:x add=1}

{sequence 3}x{/sequence}

{sequence 3, name='n'}
  {$n},
{/sequence}

{if sequence:square(6) eq 36}
  y
{/if}

{if sequence:prime(8) eq 19}
  y
{/if}

<?php

  // The lenient walk under test: with the syntax check off, what cannot run passes the
  // value through or yields empty, and the walk carries on.

  $padCheckSyntax = FALSE;

?>

[{sequence 5, push='x'}{resume:x add=1}][{pull:x}{$sequence} {/pull:x}]

<?php

  // The lenient walk under test: with the syntax check off, what cannot run passes the
  // value through or yields empty, and the walk carries on.

  $padCheckSyntax = FALSE;

?>

[{sequence '1;2;3', from='abc'}{$sequence} {/sequence}][{sequence 3, increment='x'}{$sequence} {/sequence}][{sequence 3, skip='x'}{$sequence} {/sequence}][{sequence 3, minimal='x'}{$sequence} {/sequence}][{sequence prime, to='x', rows=3}{$sequence} {/sequence}]

<?php

  // The lenient walk under test: with the syntax check off, what cannot run passes the
  // value through or yields empty, and the walk carries on.

  $padCheckSyntax = FALSE;

?>

[{echo sequence:prime(0)}][{echo sequence:fibonacci(-3)}][{echo sequence:fibonacci(2.7)}][{echo sequence:prime(1)}]

{sequence:prime rows=3}
  {$sequence},
{/sequence:prime}