Is it possible to put each word of a string into an array in Swift?
for instance:
var str = "Hello, Playground!"
to:
var arr = ["Hello","Playground"]
Thank you :)
-
2Related Swift: Split a string into an arrayMatthias Bauch– Matthias Bauch2015-01-09 22:38:40 +00:00Commented Jan 9, 2015 at 22:38
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4 Answers
edit/update:
Xcode 10.2 • Swift 5 or later
We can extend StringProtocol using collection split method
func split(maxSplits: Int = Int.max, omittingEmptySubsequences: Bool = true, whereSeparator isSeparator: (Character) throws -> Bool) rethrows -> [Self.SubSequence]
setting omittingEmptySubsequences to true and passing a closure as predicate. We can also take advantage of the new Character property isLetter to split the string.
extension StringProtocol {
var words: [SubSequence] {
return split { !$0.isLetter }
}
}
let sentence = "• Hello, Playground!"
let words = sentence.words // ["Hello", "Playground"]
Comments
Neither answer currently works with Swift 4, but the following can cover OP's issue & hopefully yours.
extension String {
var wordList: [String] {
return components(separatedBy: CharacterSet.alphanumerics.inverted).filter { !$0.isEmpty }
}
}
let string = "Hello, Playground!"
let stringArray = string.wordList
print(stringArray) // ["Hello", "Playground"]
And with a longer phrase with numbers and a double space:
let biggerString = "Hello, Playground! This is a very long sentence with 123 and other stuff in it"
let biggerStringArray = biggerString.wordList
print(biggerStringArray)
// ["Hello", "Playground", "This", "is", "a", "very", "long", "sentence", "with", "123", "and", "other", "stuff", "in", "it"]
Comments
That last solution (from Leo) will create empty elements in the array when there are multiple consecutive spaces in the string. It will also combine words separated by "-" and process end of line characters as words.
This one won't :
extension String
{
var wordList: [String]
{
return componentsSeparatedByCharactersInSet(NSCharacterSet.alphanumericCharacterSet().invertedSet).filter({$0 != ""})
}
}
Comments
To add each word of a sentence into a Set in Swift, you can use the components(separatedBy:) method to split the sentence into words and then insert each word into the Set.
Here’s an example:
Implementation:
func wordsToSet(sentence: String) -> Set<String> {
// Split the sentence into words by spaces
let words = sentence.components(separatedBy: " ")
// Create a Set from the array of words
let wordSet = Set(words)
return wordSet
}
