Comparing string array in Swift

Question

text = ["lorem", "ipsum", "dolor", "sit", "amet"]

after random:

wrongText = ["lorem", "ipsum", "amet", "sit", "dolor"]

How do i know which word was misplaced ? In example above i need only "amet" and "dolor"

Before posting do some research it may help you https://stackoverflow.com/questions/36714522/how-do-i-check-in-swift-if-two-arrays-contain-the-same-elements-regardless-of-th — Dharma, Jun 21 '17 at 13:35

score 4 · Answer 1 · answered Jun 21 '17 at 13:33

Try something like:

let changed = zip(text,wrongText).filter { $0 != $1 }.map { $0.0 }

This will pair the elements of both arrays and output the non-matching pairs. The map will extract the first word of each non-matching pair, since you'll only need that.

colmlg · Accepted Answer · 2017-06-21T14:08:11.463

0

var changed = [String]()    
for i in 0..<text.count {
      if text[i] != wrongText[i]{
         changed.append(wrongText[i])
      }            
}

edited Jun 21 '17 at 14:08

answered Jun 21 '17 at 13:35

colmlg

193
6

Thanks! var changed = [String]() for i in 0.. – Jay Jun 21 '17 at 14:04

score 0 · Answer 3 · answered Jun 21 '17 at 20:37

0

A shorter version that takes advantage of flatMap as nil filter:

let changed = zip(text, wrongText).flatMap { $0 != $1 ? $0 : nil }

answered Jun 21 '17 at 20:37

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Comparing string array in Swift

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