Swift and the Legacy of Functional Programming

Re:Swift and the Legacy of Functional Programming by niklasrde on Monday November 21, 2016 @12:42PM (#13007257)

I think it depends what you're used to. I used to be a Scala programmer, then I moved to JS.

At the moment I'm working in Objective-C, and I literally just wrote a loop to filter an array and form a new array with the results like the one in the example - and god I wish there was an as straight-forward, easily understandable functional way in Obj-C to do it like in the Swift example.

I miss these 'nice' things - I don't need the fully functional Haskell package, but I like having some of the nice things Swift has, just because I got used to them and can actually write and read them better, and it is definitely more elegant!

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Re:Swift and the Legacy of Functional Programming by antfarm on Monday November 21, 2016 @12:55PM (#13007388)

It's ugly, but possible:

  NSArray *filteredArray = [array filteredArrayUsingPredicate:[NSPredicate predicateWithBlock:^BOOL(id object, NSDictionary *bindings) {
      return [object test];
  }]];

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Re:Swift and the Legacy of Functional Programming by pjmlp on Monday November 21, 2016 @12:57PM (#13007400)

You mean something like:

    a  := #(1 2 3 4 5).
    Transcript show: (a printString); cr.
    b := a select: [:x | x \\ 2 == 0].
    Transcript show: (b printString); cr.

Sadly Objective-C isn't really Smalltalk.

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