Databases
StackOverflow2013
Postsdbo
POHow can i merge arrays like a gearwheel
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POHow can i merge arrays like a gearwheel
    primarykey
    data
    text
    <p>i have 3 arrays like this</p> <pre><code>$a = array( 0 =&gt; 'a1', 1 =&gt; 'a2', 2 =&gt; 'a3' ); $b = array( 0 =&gt; 'b1', 1 =&gt; 'b2', 2 =&gt; 'b3' ); $c = array( 0 =&gt; 'c1', 1 =&gt; 'c2', 2 =&gt; 'c3' ); </code></pre> <p>and i like to have somethink like this:</p> <pre><code>$r = array( 0 =&gt; 'a1', 1 =&gt; 'b1', 2 =&gt; 'c1', 3 =&gt; 'a2', 4 =&gt; 'b2', 5 =&gt; 'c2', 6 =&gt; 'a3', .... ... ); </code></pre> <p>how can i do this? and the option to use more then 3 arrays</p> <p><strong>EDIT:</strong></p> <p>i have tried this:</p> <pre><code>$a = array( 0 =&gt; 'a1', 1 =&gt; 'a2', 2 =&gt; 'a3', 3 =&gt; 'a4' ); $b = array( 0 =&gt; 'b1', 1 =&gt; 'b2', 2 =&gt; 'b3' ); $c = array( 0 =&gt; 'c1', 1 =&gt; 'c2', 2 =&gt; 'c3', 3 =&gt; 'c4', 4 =&gt; 'c5', 5 =&gt; 'c6' ); $l['a'] = count($a); $l['b'] = count($b); $l['c'] = count($c); arsort($l); $largest = key($l); $result = array(); foreach ($$largest as $key =&gt; $value) { $result[] = $a[$key]; if(array_key_exists($key, $b)) $result[] = $b[$key]; if(array_key_exists($key, $c)) $result[] = $c[$key]; } print_r($result); </code></pre> <p>Output: <code>Array ( [0] =&gt; a1 [1] =&gt; b1 [2] =&gt; c1 [3] =&gt; a2 [4] =&gt; b2 [5] =&gt; c2 [6] =&gt; a3 [7] =&gt; b3 [8] =&gt; c3 [9] =&gt; a4 [10] =&gt; c4 [11] =&gt; [12] =&gt; c5 [13] =&gt; [14] =&gt; c6 )</code></p> <p>this work.. but the code isn't nice. so anyone has a better solution?</p> <p><strong>Solution:</strong> i updated the post from @salathe with some dynamic feature</p> <pre><code>function comb(){ $arrays = func_get_args(); $result = array(); foreach (call_user_func_array(array_map, $arrays) as $column) { $values = array_filter($column, function ($a) { return $a !== null; }); $result = array_merge($result, $values); } return $result; } print_r(comb(null,$a,$b,$c,$d,....)); </code></pre> <p>Thanks to all!</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USJuKe
    1. USJuKe
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POHow can i merge arrays like a gearwheel
      1. This table or related slice is empty.
      1. VTDownMod
    2. VO
      singulars
      1. POHow can i merge arrays like a gearwheel
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POHow can i merge arrays like a gearwheel
      1. This table or related slice is empty.
      1. VTUpMod
    1. COWhat happens if the arrays are of different sizes, or their keys are not consecutively numbered from `0`?
      singulars
      1. POHow can i merge arrays like a gearwheel
      1. USeggyal
    2. COthe arrays can have differenz sizes... the merging shoud still go on..
      singulars
      1. POHow can i merge arrays like a gearwheel
      1. USJuKe
    3. COQuestions asking for code must demonstrate a minimal understanding of the problem being solved. Include attempted solutions, and why they didn't work.
      singulars
      1. POHow can i merge arrays like a gearwheel
      1. USKermit
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload