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Sort Tarray of FStrings Alphanumericaly

I have a TArray of FStrings that I would like to sort Alphanumerically. And I know TArray has a sort function which relies on predicates which Im not really familiar with. How would I go about sorting this array?

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asked Jan 02 '15 at 02:24 PM in C++ Programming

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Opamp77
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2 answers: sort voted first

TArray.Sort() has two overloads. The first one doesn't take and arguments, so you can just call MyStringArray.Sort() and it will sort alphanumerically, no predicate logic required.

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answered Jan 02 '15 at 05:53 PM

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Jared Therriault
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avatar image Opamp77 Jan 03 '15 at 04:04 PM

Thanks, I never noticed that.

avatar image BrɑκеPɑd STAFF Jan 05 '15 at 04:42 PM

Just to add to this, if you wanted to define any custom sorting logic, you could do so by passing a lambda to the sort:

 // Sort the array in alphanumeric descending order.
 // The predicate should return true if One should be sorted before Two, false otherwise
 MyArray.Sort([](const FString& One, const FString& Two){
     return One > Two;
 });

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If you want to sort it by yourself you could just go through the array with a loop and check which string is smaller with the normal comparison operator. Every kind of sorting algorithm should work.

Don't have time testing this at the moment.

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answered Jan 02 '15 at 03:00 PM

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eXi
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