Databases
StackOverflow2013
Postsdbo
POHow to randomly take examples from arrays, shuffle them and place them into a new array to be formatted as a list
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POHow to randomly take examples from arrays, shuffle them and place them into a new array to be formatted as a list
    primarykey
    data
    text
    <p>In a <a href="https://stackoverflow.com/questions/18242012/how-do-you-store-random-parts-of-an-array-within-an-array-and-then-print-as-a-li">previous question</a> I didn't realize that I wouldn't be able to add in the rest of the changes myself, so here is what I'm working with. User webfix helped me get this:</p> <pre><code>$mars = array ('How big is Mars?', 'How many moons does Mars have?', 'How far away is Mars?', 'What is the highest point on Mars?'); $jupiter = array ('How big is Jupiter?', 'How many moons does Jupiter have?', 'How far away is Jupiter?', 'What is the highest point on Jupiter?'); $earth = array ('How big is Earth?', 'How many moons does Earth have?', 'How far away is Earth?', 'What is the highest point on Earth?'); $sun = array ('How big is the Sun?', 'How many moons does the Sun have?', 'How far away is the Sun?', 'What is the highest point on the Sun?'); $all = array($mars, $jupiter, $earth, $sun); function createList($a) { echo "&lt;ul&gt;"; foreach ($a as $array) { $questions = count($array); $idquestion = rand(0, $questions-1); echo "&lt;li&gt;" . $array[$idquestion] . "&lt;/li&gt;"; } echo "&lt;/ul&gt;"; } createList($all); </code></pre> <p>I now want to add to this a randomization of the order of questions as well as a maximum of three (or any number to be changed later) questions spit out.</p> <p>It currently will choose one of each question ($mars, $jupiter, $earth, $sun) and then make it into a list in that order. I want the order to be randomized and for only three of them to be chosen.</p> <p>I tried to use "shuffle ($all)", but that didn't work and maybe we could use something like the "for ($i = 1; $i &lt; 4; $i++)" to make it stop after picking three? Thanks.</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USCommunity
    1. USAlex
    plurals
    1. PL
      singulars
      1. LTLinked
    2. PL
      singulars
      1. LTLinked
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POHow to randomly take examples from arrays, shuffle them and place them into a new array to be formatted as a list
      1. This table or related slice is empty.
      1. VTDownMod
    1. COIt looks like you have not added or changed *anything* since the answer to your last question. If you did do something, please let us know what you've tried (including research!).
      singulars
      1. POHow to randomly take examples from arrays, shuffle them and place them into a new array to be formatted as a list
      1. USTomas Creemers
    2. COI've looked extensively on the internet and on stackoverflow for randomization of an array. And the examples don't seem to work with this function. I tried adding shuffle ($all) into the program, but that was ignored by the server and I don't know why. I tried to add in a for loop, but as a novice programer, I don't really understand how everything works and ever after reading up on these things, I understand, but for some reason can't get them to work with the code that I want. All the little bits makes sense to me, but I don't know how to fit them all together.
      singulars
      1. POHow to randomly take examples from arrays, shuffle them and place them into a new array to be formatted as a list
      1. USAlex
    3. CODo you still want one question from each sub-array, or are two Mars questions OK?
      singulars
      1. POHow to randomly take examples from arrays, shuffle them and place them into a new array to be formatted as a list
      1. USBarmar
 

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