questions on Basic Flist operation

[yuwen 0]

Hi,

I am trying to create an Flist containing Fdouble values, and would like to use the .sort() class function to sort the values within the list. However, when i do that, i got an error,  *** ERROR Command Control : failure [invalid expression "|04_partision|clean_partision_gen1:Wing_x_loc_array.maxElement()": Cannot execute non-const command on const object]. 

May i know what does it mean by a non-const command and const object ? Thank you.

Yuwen

[Mr. Heinrich von Zadow 5]

Hi Yuwen,

it usually means that you try to modify an object that you are not allowed to (in order to prevent recursion). If you just need the max value, you could (inside a feature) use a doubleSeries like this:

FDoubleSeries values([1,2,3,4,5,4,3,2,1])
FDouble maxVal(values.getMax())

Cheers,
Heinrich

[yuwen 0]

Hi Heinrich,

Thanks for the reply. How about if i want to sort an array in an ascending order ? One of the reason I want to use FList is because it seems to be the only type that has a built-in sorting feature, but apparently it has the same recursion issue.  Is there any other object that allows me to return an sorted array from an input Fdouble/Finteger array ?  Thank you.

Yuwen

[Mr. Heinrich von Zadow 5]

Hi Yuwen,

at this moment we don't really have this kind of functionality. However, you might want to check again after the next release 😉

In the meantime I attached a quicksort algorithm feature from this old post from Arne:

Cheers,
Heinrich

quicksort.fdf

[yuwen 0]

Hi Herich,

Ok, thanks for the code. 

Yuwen