// CharacterExtensions.swift - Copyright 2024 SwifterSwift
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// MARK: - Properties
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public extension Character {
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/// SwifterSwift: Check if character is emoji.
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///
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/// Character("😀").isEmoji -> true
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///
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var isEmoji: Bool {
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// http://stackoverflow.com/questions/30757193/find-out-if-character-in-string-is-emoji
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let scalarValue = String(self).unicodeScalars.first!.value
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switch scalarValue {
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case 0x1F600...0x1F64F, // Emoticons
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0x1F300...0x1F5FF, // Misc Symbols and Pictographs
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0x1F680...0x1F6FF, // Transport and Map
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0x1F1E6...0x1F1FF, // Regional country flags
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0x2600...0x26FF, // Misc symbols
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0x2700...0x27BF, // Dingbats
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0xE0020...0xE007F, // Tags
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0xFE00...0xFE0F, // Variation Selectors
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0x1F900...0x1F9FF, // Supplemental Symbols and Pictographs
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127_000...127_600, // Various asian characters
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65024...65039, // Variation selector
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9100...9300, // Misc items
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8400...8447: // Combining Diacritical Marks for Symbols
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return true
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default:
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return false
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}
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}
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/// SwifterSwift: Integer from character (if applicable).
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///
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/// Character("1").int -> 1
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/// Character("A").int -> nil
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///
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var int: Int? {
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return Int(String(self))
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}
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/// SwifterSwift: String from character.
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///
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/// Character("a").string -> "a"
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///
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var string: String {
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return String(self)
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}
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/// SwifterSwift: Return the character lowercased.
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///
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/// Character("A").lowercased -> Character("a")
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///
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var lowercased: Character {
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return String(self).lowercased().first!
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}
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/// SwifterSwift: Return the character uppercased.
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///
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/// Character("a").uppercased -> Character("A")
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///
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var uppercased: Character {
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return String(self).uppercased().first!
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}
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}
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// MARK: - Methods
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public extension Character {
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/// SwifterSwift: Random character.
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///
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/// Character.random() -> k
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///
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/// - Returns: A random character.
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static func randomAlphanumeric() -> Character {
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return "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789".randomElement()!
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}
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}
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// MARK: - Operators
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public extension Character {
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/// SwifterSwift: Repeat character multiple times.
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///
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/// Character("-") * 10 -> "----------"
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///
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/// - Parameters:
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/// - lhs: character to repeat.
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/// - rhs: number of times to repeat character.
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/// - Returns: string with character repeated n times.
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static func * (lhs: Character, rhs: Int) -> String {
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guard rhs > 0 else { return "" }
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return String(repeating: String(lhs), count: rhs)
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}
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/// SwifterSwift: Repeat character multiple times.
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///
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/// 10 * Character("-") -> "----------"
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///
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/// - Parameters:
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/// - lhs: number of times to repeat character.
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/// - rhs: character to repeat.
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/// - Returns: string with character repeated n times.
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static func * (lhs: Int, rhs: Character) -> String {
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guard lhs > 0 else { return "" }
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return String(repeating: String(rhs), count: lhs)
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}
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}
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