Counting problem

[Jacques Hausser]

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