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3 points by krapp 2268 days ago | link | parent

OK, I have a stupid question. How do I remove an item from a table?

Apparently it's (rem test table) but everything I've tried fails with "Can't take car of #hash(("foo" . (app-run "foo")))" I also thought I might have to assign nil to it but that returns an error as well. Here is my current code if it helps... it's just minor edits of prompt.arc, assignment and running an app in a hook all work:

    (def app-unhook (user app)
      (do ((rem !app hooks*) 
          (editor-page user "Hook removed from " app))))

    (def app-hook (user app) 
      (if (file-exists (app-filepath app))
        (do ((= (hooks* app) `(app-run ,app))
            (editor-page user "Hook applied to " app)))
        (editor-page user "Error: No application " app)))
I feel like I'm probably missing something obvious.


3 points by i4cu 2268 days ago | link

rem only works on seqs, you need to set the value to nil:

  (= (mytable 'key) nil)
and tables don't hold nil valued entries so it works.

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2 points by krapp 2268 days ago | link

thanks!

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