> Hello, I am new to smalltalk and I would really appreciate your help so I can
> better use and understand Pharo.
>
> So here is the problem, I wanted to implement a function to get the value of
> my tree struct nodes in a recursive manner and I wanted to concatenate them
> to a String ( aText ) and later show them on the Transcript.
>
>
> showLists
>          | aText |
>           aText  :=  lol level,  (String with: Character cr).
>          self recursiveShowLists: lol withText: aText tabsNumber: 1.
>
>
>
>
> recursiveShowLists: aLoL withText: aText tabsNumber: aNumb
>          | counter index |
>          aLoL lols isEmpty
>                  ifFalse: [
>                          counter := 1.
>                          [ counter <= aNumb ]
>                                  whileTrue: [
>                                          aText := aText , (String with:
> Character tab).
>                                          counter := counter + 1 ].
>                          index := 1.
>                          aNumb := aNumb + 1.
>                          LoL lols do: [ :each | aText := aText , each level ,
> (String with: Character cr) ].
>                          ]
>
>
>
> Without having the last line ( LoL lols do: ... ) everything works fine but
> when I include it and as soon as debugger reaches to [counter <= aNumb ] and
> wants to evaluate it, my arguments start to act weird. aText will become nil
> and aNumb will hold te value of aText!
>
>
> I fixed this issue by adding another temporary variable ( copyText ) and
> instead of direct assignment of aText I used the copyText:
>
>
>
> recursiveShowLists: aLoL withText: aText tabsNumber: aNumb
>          | counter index copyText |
>          copyText := aText.
>          aLoL lols isEmpty
>                  ifFalse: [
>                          counter := 1.
>                          [ counter <= aNumb ]
>                                  whileTrue: [
>                                          copyText := copyText , (String with:
> Character tab).
>                                          counter := counter + 1 ].
>                          index := 1.
>                          aLoL lols do: [ :each | copyText := copyText , each
> level , (String with: Character cr) ] ]
>
>
>
> I really like to know the reason behind this issue,  I appreciate all the
> explanations.
> Thanks,
> Aria
>
>
>
>
> --
> View this message in context: http://forum.world.st/I-need-some-explaination-about-arguements-assignment-tp4772102.html
> Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.
>
>