Created
March 1, 2018 00:48
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Swift String Extension for accessing Characters via Int; plus conversion to C
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// | |
// String+AE.swift | |
// Aepryus | |
// | |
// Created by Joe Charlier on 11/20/17. | |
// Copyright © 2017 Aepryus Software. All rights reserved. | |
// | |
import Foundation | |
public extension String { | |
public subscript(i: Int) -> Character { // [a] | |
return self[index(startIndex, offsetBy: i)] | |
} | |
public subscript(r: CountableClosedRange<Int>) -> String { // [a...b] | |
let start = index(startIndex, offsetBy: r.lowerBound) | |
let end = index(startIndex, offsetBy: r.upperBound) | |
return String(self[start...end]) | |
} | |
public subscript(r: CountablePartialRangeFrom<Int>) -> String { // [a...] | |
let start = index(startIndex, offsetBy: r.lowerBound) | |
let end = endIndex | |
return String(self[start..<end]) | |
} | |
public subscript(r: PartialRangeThrough<Int>) -> String { // [...b] | |
let start = startIndex | |
let end = index(startIndex, offsetBy: r.upperBound) | |
return String(self[start...end]) | |
} | |
public subscript(r: PartialRangeUpTo<Int>) -> String { // [..<b] | |
guard r.upperBound > 0 else {return ""} | |
let start = startIndex | |
let end = index(startIndex, offsetBy: r.upperBound-1) | |
return String(self[start...end]) | |
} | |
public func loc(of string: String) -> Int? { | |
for i: Int in 0..<count-string.count { | |
let test: String = self[i...(i+string.count-1)] | |
if string == test { | |
return i | |
} | |
} | |
return nil | |
} | |
public var capitalize: String { | |
guard let first = first else { return "" } | |
return String(first).uppercased() + dropFirst() | |
} | |
public func toInt8() -> UnsafeMutablePointer<Int8> { | |
return UnsafeMutablePointer<Int8>(mutating: (self as NSString).utf8String!) | |
} | |
public func toCString() -> [CChar]? { | |
return self.cString(using: .utf8) | |
} | |
public static func uuid() -> String { | |
return UUID().uuidString | |
} | |
} |
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