Number of words in a Swift String for word count calculation

by

update: Xcode 10.2.x • Swift 5 or later

Using Foundation method enumerateSubstrings(in: Range)and setting .byWords as options:

let sentence = "I want to an algorithm that could help find out how many words are there in a string separated by space or comma or some character. And then append each word separated by a character to an array which could be added up later I'm making an average calculator so I want the total count of data and then add up all the words. By words I mean the numbers separated by a character, preferably space Thanks in advance"

var words: [Substring] = []
sentence.enumerateSubstrings(in: sentence.startIndex..., options: .byWords) { _, range, _, _ in
    words.append(sentence[range])
}
print(words) // "["I", "want", "to", "an", "algorithm", "that", "could", "help", "find", "out", "how", "many", "words", "are", "there", "in", "a", "string", "separated", "by", "space", "or", "comma", "or", "some", "character", "And", "then", "append", "each", "word", "separated", "by", "a", "character", "to", "an", "array", "which", "could", "be", "added", "up", "later", "I\\'m", "making", "an", "average", "calculator", "so", "I", "want", "the", "total", "count", "of", "data", "and", "then", "add", "up", "all", "the", "words", "By", "words", "I", "mean", "the", "numbers", "separated", "by", "a", "character", "preferably", "space", "Thanks", "in", "advance"]\n"
print(words.count)  // 79

Or using native Swift 5 new Character property isLetter and the split method:

let words =  sentence.split { !$0.isLetter }

print(words) // "["I", "want", "to", "an", "algorithm", "that", "could", "help", "find", "out", "how", "many", "words", "are", "there", "in", "a", "string", "separated", "by", "space", "or", "comma", "or", "some", "character", "And", "then", "append", "each", "word", "separated", "by", "a", "character", "to", "an", "array", "which", "could", "be", "added", "up", "later", "I", "m", "making", "an", "average", "calculator", "so", "I", "want", "the", "total", "count", "of", "data", "and", "then", "add", "up", "all", "the", "words", "By", "words", "I", "mean", "the", "numbers", "separated", "by", "a", "character", "preferably", "space", "Thanks", "in", "advance"]\n"

print(words.count)  // 80

Extending StringProtocol to support Substrings as well:

extension StringProtocol {
    var words: [SubSequence] { 
        return split { !$0.isLetter } 
    }
    var byWords: [SubSequence] {
        var byWords: [SubSequence] = []
        enumerateSubstrings(in: startIndex..., options: .byWords) { _, range, _, _ in
            byWords.append(self[range])
        }
        return byWords
    }
}

sentence.words  // ["I", "want", "to", "an", "algorithm", "that", "could", "help", "find", "out", "how", "many", "words", "are", "there", "in", "a", "string", "separated", "by", "space", "or", "comma", "or", "some", "character", "And", "then", "append", "each", "word", "separated", "by", "a", "character", "to", "an", "array", "which", "could", "be", "added", "up", "later", "I", "m", "making", "an", "average", "calculator", "so", "I", "want", "the", "total", "count", "of", "data", "and", "then", "add", "up", "all", "the", "words", "By", "words", "I", "mean", "the", "numbers", "separated", "by", "a", "character", "preferably", "space", "Thanks", "in", "advance"]

More Related Contents:

  1. Get nth character of a string in Swift programming language
  2. Read and write a String from text file
  3. Swift 3 incorrect string interpolation with implicitly unwrapped Optionals
  4. Any way to replace characters on Swift String?
  5. Index of a substring in a string with Swift
  6. How do I check if a string contains another string in Swift?
  7. How does String substring work in Swift
  8. How to enumerate an enum with String type?
  9. How does String.Index work in Swift
  10. Swift double to string
  11. How to print double quotes inside “”?
  12. What does it mean that string and character comparisons in Swift are not locale-sensitive?
  13. Why are emoji characters like 👩‍👩‍👧‍👦 treated so strangely in Swift strings?
  14. Check password string strength criteria in Swift
  15. How to remove diacritics from a String in Swift?
  16. String length in Swift 1.2 and Swift 2.0 [duplicate]
  17. Filter non-digits from string
  18. Get nth character of a string in Swift
  19. What’s the simplest way to convert from a single character String to an ASCII value in Swift?
  20. Get Description of Emoji Character
  21. How String Comparison happens in Swift
  22. Swift playground – How to convert a string with comma to a string with decimal
  23. Swift find all occurrences of a substring
  24. Highlight a specific part of the text in SwiftUI
  25. SwiftUI: How to implement a custom init with @Binding variables
  26. Convert Character to Int in Swift 2.0
  27. Getting the coordinates from the location I touch the touchscreen
  28. UIBezierPath doesn’t work in TopRight corner and BottomRight corner
  29. What determines whether a Swift 5.5 Task initializer runs on the main thread?
  30. Check if key exists in dictionary of type [Type:Type?]

Leave a Comment