[Gambas-user] Idea for arrays: .SWAP function

[Rolf-Werner Eilert]

Am 09.10.20 um 10:09 schrieb Benoît Minisini:
> Le 09/10/2020 à 10:07, Benoît Minisini a écrit :
>> Le 09/10/2020 à 09:55, Rolf-Werner Eilert a écrit :
>>> Hi Benoit and all,
>>>
>>> Just had this one in a current project. To enable the user to push an 
>>> entry in a list one up or down, I have to swap the related values in 
>>> several arrays. There seems to be no swap function, so I have to 
>>> write 3 lines of codes for it, like this:
>>>
>>>   t$ = klName[po]
>>>   klName[po] = klName[po + 1]
>>>   klName[po + 1] = t$
>>>
>>> I have to use these 3 lines for each array. How much easier it would 
>>> be if I could use a function like for this:
>>>
>>> klName.Swap(po, po+1)
>>>
>>> This would also make sense in ListBox etc.
>>>
>>> I think this would enhance code and readability a lot.
>>>
>>> Regards
>>> Rolf
>>>
>>
>> Do the following:
>>
>> Swap klName[po], klName[po + 1]
>>
>> It compiles into what you wrote, but using a stack slot instead of a 
>> local variable.
>>
>> Regards,
>>
> 
> By the way your request is right in a way. An array Swap() method would 
> ba a little bit faster than the Swap instruction.
> 

Aaah thanks for the quick answer! I now remember I once used it. And 
this way, it is more flexible, as one can swap items from two different 
arrays.

Thanks to both of you!

Rolf