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String Extensions
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extension CharacterSet { | |
static let vowels = CharacterSet(charactersIn: "aeiou") | |
static let consonants = CharacterSet.letters.subtracting(vowels) | |
} | |
extension String { | |
var specialChars: String { | |
self | |
.components(separatedBy: .punctuationCharacters) | |
.joined() | |
} | |
var vowels: String { | |
self | |
.components(separatedBy: .consonants) | |
.joined() | |
.filter { $0 != " " } | |
} | |
var consonants: String { | |
self | |
.components(separatedBy: CharacterSet.vowels) | |
.joined() | |
.filter { $0 != " " } | |
} | |
// "aaaacciiiiffffpppp".lettersCount | |
// => "p4i4c2f4a4" | |
var lettersCount: String { | |
return self | |
.reduce(into: [:]) { (counts, letter) in counts[letter.description, default: 0] += 1 } | |
.map { "\($0.key)\($0.value)" } | |
.joined() | |
} | |
} | |
let someString = "first.last.name@email.com" | |
print(someString.consonants) | |
// => frst.lst.nm@ml.cm | |
print(someString.vowels) | |
// => i.a.ae@eai.o | |
print(someString.specialChars.consonants) | |
// => frstlstnmmlcm | |
print(someString.specialChars.vowels) | |
// => iaaeeaio |
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