Counting problem

Dar Scott dsc at swcp.com
Sat May 25 11:41:57 EDT 2013


Putting

	local tcount
 
at the top of the handler fixes this for me.  (Maybe somebody already said that.)

This is a scary bug for me.  I quit LiveCode after the tests.

Dar


On May 25, 2013, at 2:44 AM, Jacques Hausser wrote:

> Craig,
> 
> A way to have the second script working correctly (sum on the counter array = 10) is to declare and fill the counter explicitly before using it; my version:
> 
>  on mouseup
>   put "a,b,c,d,e,f,g,h,i,j" into temp
>   repeat with i = 1 to 10
>      put 0 into tcount[item i of temp]
>   end repeat
>     repeat 10
>      add 1 to tcount[any item of temp]
>    end repeat
>   put "" into fld "F1"
>      put 0 into tSum
>      repeat with i = 1 to 10
>            put item i of temp & " : " & tcount[item i of temp] & return after fld "F1"
>            add tcount[item i of temp] to tSum
>      end repeat
>      put return & "Sum = " & tSum after fld "F1"
> end mouseUp
> 
> the sum is always 10 - if you want to go back to craziness, just comment out the first loop. Sums between 6 and 17 in my trials.
> I also noticed that the automatic indent doesn't work correctly for the "repeat 10" loop - perhaps an indication that the interpreter doesn't understand exactly what we mean…
> 
> For Alex: I didn't observe the correcting effect of adding "put counter["b"] into tJunk" to the loop (OS 10.8.3, either with 6.0.1 or 5.5.4). The result was as bad as without the command.
> 
> A very intriguing bug anyway ! I filled a bug report, # 10925 (giving credit to Craig for his amazing discovery)
> 
> Jacques
> 
> 
> 
> 
> Le 25 mai 2013 à 04:26, dunbarx at aol.com a écrit :
> 
>> Alex.
>> 
>> 
>> I am the kind of guy that is happy to solve a problem without understanding it. But this one is, er, bugging me.
>> 
>> 
>> Craig
>> 
>> 
>> 
>> -----Original Message-----
>> From: Alex Tweedly <alex at tweedly.net>
>> To: use-livecode <use-livecode at lists.runrev.com>
>> Sent: Fri, May 24, 2013 7:11 pm
>> Subject: Re: Counting problem
>> 
>> 
>> I see the same problem on both 5.5.3 and 6.0.1 - but testing in the 
>> message box.
>> 
>> Oddly, I happened to notice that if I change the script to be
>> 
>> put "a,b,c,d,e,f,g,h,i,j" into temp
>>   repeat 10
>>      add 1 to counter[any item of temp]
>>      put counter["b"] into tJunk          -- i.e. I add a single useless line 
>> !!
>> end repeat
>> 
>> 
>> 
>> it works just fine every time.
>> Don't know if that helps you or makes it worse :-)
>> 
>> -- Alex.
>> 
>> On 24/05/2013 22:56, dunbarx at aol.com wrote:
>>> I know I am going to feel like a dope, but why does the first script always 
>>> properly give ten counts in the array variable "counter", but the second can 
>>> give anywhere from five to sixteen, and maybe others?
>>> 
>>> 
>>> 
>>> on mouseUp
>>>   put "a,b,c,d,e,f,g,h,i,j" into temp
>>>   repeat 10
>>>     get any item of temp --always gives ten
>>>      add 1 to counter[it]
>>>   end repeat
>>> end mouseUp
>>> 
>>> 
>>> on mouseup
>>>   put "a,b,c,d,e,f,g,h,i,j" into temp
>>>   repeat 10
>>>      add 1 to counter[any item of temp]
>>>  end repeat
>>> end mouseUp
>>> 
>>> 
>>> 
>>> 
>>> I have deconstructed the problem line by watching the array in the debugger on 
>>> the sly after each iteration. It goes crazy, sometimes the count of a particular 
>>> char going DOWN.
>>> 
>>> 
>>> Craig Newman
> 
> 
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