fredriccliver

import Foundation

extension String {
  var withoutPunctuations: String {
    return self.components(separatedBy: CharacterSet.punctuationCharacters).joined(separator: "")
  }
}

let originalStr:String = "hello, (Nice to- meet 한국 école %&$you all. 123 ! Давай العربية 😀"

jrochkind

# test_for  == N / 5    -- approximate array average case?

{:benchmark_iterations=>10000, :class=>Array, :test_for=>5, :num_rewrites=>1, :col_size=>10, :num_reads=>10}
  0.140000   0.000000   0.140000 (  0.141915)

{:benchmark_iterations=>10000, :class=>Set, :test_for=>5, :num_rewrites=>1, :col_size=>10, :num_reads=>10}
  0.190000   0.010000   0.200000 (  0.198503)
----

{:benchmark_iterations=>10000, :class=>Array, :test_for=>50, :num_rewrites=>1, :col_size=>100, :num_reads=>10}

susieyy

extension UIViewController {
    var previousViewController: UIViewController? {
        guard let navigationController = navigationController else { return nil }
        let count = navigationController.viewControllers.count
        return count < 2 ? nil : navigationController.viewControllers[count - 2]
    }
}

MaciejGad

extension NSImage {
    
    /// Returns the height of the current image.
    var height: CGFloat {
        return self.size.height
    }
    
    /// Returns the width of the current image.
    var width: CGFloat {
        return self.size.width

norsez

import Foundation

/**
Extension to save/load a JSON object by filename. (".json" extension is assumed and automatically added.)
 */
extension JSONSerialization {
    
    static func loadJSON(withFilename filename: String) throws -> Any? {
        let fm = FileManager.default

proxpero

// taken 2018-03-19 from wikipedia. https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes

public enum Iso639_1: String {
    case ab = "AB"
    case aa = "AA"
    case af = "AF"
    case ak = "AK"
    case sq = "SQ"
    case am = "AM"
    case ar = "AR"

EnesKaraosman

#if canImport(UIKit)

import UIKit
extension UIColor {
    static var random: UIColor {
        return UIColor(
            red: .random(in: 0...1),
            green: .random(in: 0...1),
            blue: .random(in: 0...1)
        )

amro

// How one might use NSMutableOrderedSet from Swift -- mainly an example of how to
// call Objective-C classes from Swift. Pretty much what one would expect.

var set = NSMutableOrderedSet()
set.addObject("foo");
set.addObject("bar");
set.addObjectsFromArray(["bar", "wee", "foo"])

for i in 0..set.count {
    println(set.objectAtIndex(i))

nbasham

import Foundation

extension Date {
    
    static func randomBetween(start: String, end: String, format: String = "yyyy-MM-dd") -> String {
        let date1 = Date.parse(start, format: format)
        let date2 = Date.parse(end, format: format)
        return Date.randomBetween(start: date1, end: date2).dateString(format)
    }

mortenjust

func openAndSelectFile(filename:String){
    let files = [NSURL(fileURLWithPath: filename)];
    NSWorkspace.sharedWorkspace().activateFileViewerSelectingURLs(files);
}