Great! and thanks for the listing (I keep forgetting to save my 
workspace code from the videos :-/)

Am I right in thinking this really shouldn't permanently lock things up 
, even though its an obvious bug in my code?

It would be a common noob mistake and pretty awful to have happen as 
your first encounter with a Squeak bug.

L

On 4/15/14, 3:19 PM, gettimothy wrote:
> First, thanks for an awesome vid. Very informative.
>
>
>     |myMorphs|
>     myMorphs := Array new: 360.
>     0 to: 359 by:15 do:[:i | myMorphs at: i+1 put:((NCCurveMorph new)
>     extent: 20 at 20;
>     openInWorld;
>     center: (450 at 330) + (300 *((i degreesToRadians cos)@(i
>     degreesToRadians sin))); yourself)].
>
>
>     1 to:(myMorphs size - 1) do:[:i |
>     i+1 to: myMorphs size do:[:j |
>     ((myMorphs at:i ) ~= nil and:(myMorphs at:j ) ~= nil)
>     ifTrue:[NCAAConnectorMorph fromMorph: (myMorphs at:i)
>     toMorph:(myMorphs at:j)]]]
>
>     "tty Debug Lock"
>     NCAAConnectorMorph allInstances do:[:each | each lock:True].      
>     "This locks it"
>     NCAAConnectorMorph allInstances inspect.                    
>      "about 285 instances"
>     Transcript clear.
>     NCAAConnectorMorph allInstances do:[:each | Transcript show: (each
>     bounds);cr. ].  "works"
>     NCAAConnectorMorph allInstances do:[:each | Transcript show: (each
>     bounds);cr. each lock:true ]. "works"
>     NCAAConnectorMorph allInstances do:[:each | each lock:true].  "works"
>     True inspect.
>     true inspect.
>     NCAAConnectorMorph allInstances do:[:each | each lock:(True
>     initializedInstance)].   "works"
>
>
> I was able to recreate the lockup you described.
> Changing the lock:True to lock:true (all lowercase) does not cause the 
> lock up.
>
> You can work through the reasoingin with the "tty Debug Lock" section 
> in the above code.
>
> If you do the two inspect statements at the bottom, you will see you 
> where passing the "True class" instead of the instance "True".
>
> cordially,
>
> tty
>
>
>
>


-- 
Squeak from the very start (introduction to Squeak and Pharo Smalltalk for the (almost) complete and compleate beginner).
https://www.youtube.com/playlist?list=PL6601A198DF14788D&feature=view_all

"Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it." - Brian Kernighan

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.squeakfoundation.org/pipermail/squeak-dev/attachments/20140415/bbb3e324/attachment.htm