IsISogram -stl library and unreal library

Hi ,
I trying to write my own IsISogram .
So i want to sort FString (input word), then after sorting is done i can do only one loop to check if any two adjacent characters is the same if yes than this word is not Isogram…
I can also skip the loop and use adjacent_find from stl…
So basically two lines of code with stl //sort//adjacent find//
I find something similar within unreal documentation but could not make it work…
Will it be covered in later classes?
maybe someone knows how to sort using unreal library…?
Thanks

Solved it… i was so sure that unreal sort gets the same parameters as stl sort…
But it got different parameters (first element location, amount of elements) opposed to stl (iter.begin(),iter.end())
:man_facepalming:

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