Question

How to count the unique words in a string with Swift

Answer 1

import Foundation

let s = "Swift programming language is a general-purpose programming language"

// Split the string into words
let words = s.lowercased().components(
            separatedBy: CharacterSet.punctuationCharacters.union(.whitespacesAndNewlines))

// Remove empty strings
let filteredWords = words.filter { !$0.isEmpty }

// Use a Set to store unique words
let uniqueWords = Set(filteredWords)

let uniqueWordCount = uniqueWords.count

print("Unique words: \(uniqueWords)")
print("Number of unique words: \(uniqueWordCount)")


 
/*
run:
 
Unique words: ["purpose", "is", "swift", "programming", "a", "general", "language"]
Number of unique words: 7

*/

 

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