Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>I think the problem is that you've got three modules: <code>dinner</code>, <code>eater</code>, and <code>chopstick</code>, but try to call <code>philospher:start</code> in your <code>dinner:init/0</code> function. Try <code>eater:start</code> instead.</p> <p>The second problem is the order of module and function name when generating random numbers; replace <code>uniform:random</code> with <code>random:uniform</code> in your <code>eater.erl</code>:</p> <pre><code>1&gt; dinner:start(). &lt;0.35.0&gt; Confucios received a chopstick Confucios received a chopstick Confucios started eating Confucios put back two chopsticks Confucios received a chopstick Confucios received a chopstick Confucios started eating Confucios put back two chopsticks Confucios received a chopstick Confucios received a chopstick Confucios started eating Confucios put back two chopsticks Confucios received a chopstick Confucios received a chopstick Confucios started eating Confucios put back two chopsticks Confucios received a chopstick Confucios received a chopstick Confucios started eating Confucios put back two chopsticks Avicenna received a chopstick Avicenna received a chopstick Avicenna started eating ... </code></pre> <p>This pretty quickly shows the third problem -- something we should have spotted from the first error report -- that the eaters aren't actually in their own processes. So edit <code>eater.erl</code> so that the <code>start()</code> function reads:</p> <pre><code>start(Hungry, Right, Left, Name, Ctrl) -&gt; spawn_link(fun() -&gt; dream(Hungry, Right, Left, Name, Ctrl) end). </code></pre> <p>Now it works as intended:</p> <pre><code>1&gt; dinner:start(). &lt;0.35.0&gt; Confucios received a chopstick Plato received a chopstick Confucios received a chopstick Confucios started eating Descartes received a chopstick Kant received a chopstick Confucios put back two chopsticks Avicenna received a chopstick ... </code></pre> <p>Thanks. This was good fun.</p>
    singulars
    1. This table or related slice is empty.
    1. POErlang - Dining Philosophers errors
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USsarnold
    1. USsarnold
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POErlang - Dining Philosophers errors
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COThe "second problem" from sarnold's answer still isn't fixed.
      singulars
      1. PO
      1. USdsmith
    2. COI added comments about the problems in the opening post, thanks, it works!
      singulars
      1. PO
      1. USRickard
 

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