Hi Peter,
On Fri, 9 Nov 2018 at 18:51, Peter Uhnak <i.uh...@gmail.com> wrote:
>>
>> but how do I find now the answer do I have to do something like puzzle1
>> stepChanges detectIndex ?
>
>
> How do you mean? It would be the same
>
> santaFloorOnBasement
> "calculates which step take Santa to the basement"
>
> stepChanges := input collect: [ :c |
> floor := floor + (c = '(' ifTrue: [ 1 ] ifFalse: [ -1 ]).
> floor
> ].
>
> stepChanges detectIndex: [ :each | each = -1 ] ifNone: [ 'invalid input
> yo' ].
>
>> then I see this error message : Improper store to indexable object.
>
>
> Because earlier you were comparing strings and not characters, I assumed your
> input was an array of strings like #('(' '(' '('). but you can fix that by
> changing `input collect:` -> `input asArray collect:` and `c = '('` -> `c =
> $(`.
Using '(' instead of $( is indeed an error, but it isn't the cause of
the Improper store error.
Roelof, I really suggest you trigger this error again, start the
debugger and then take a look in the call stack (I'm assuming you're
familiar with at least one other programming language, so should be
able to figure out the debugger).
Cheers,
Alistair
