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Zeeshan Khan zeeshankhan

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View IsUniquelyReference.swift
class A {
var x = "a"
}
var a: A = A()
isUniquelyReferencedNonObjC(&a)
var b = a
isUniquelyReferencedNonObjC(&a)
@zeeshankhan
zeeshankhan / Queue.swift
Last active Mar 15, 2016
Queue using value type generics and memory pointers
View Queue.swift
protocol QueueType {
typealias Element
mutating func enqueue(element: Element)
mutating func dequeue() -> Element?
func peek() -> Element?
}
final class Storage<Element> {
View Closures.swift
let staionary = ["Black Pen", "Blue Pen", "Red Pen", "Green Pen", "Notebook", "Science Book", "Physics Book", "Maths Book", "CD", "Laptop", "Flopy Disk", "Keyboard", "Mouse", "mac OS", "iOS", "LinuxOS", "AndroidOS", "tvOS", "watchOS", "WindowsOS", "iPad", "iPhone", "iPod"]
let books = staionary.filter { (item: String) -> Bool in
return item.containsString("Book")
}
let pens = staionary.filter { (item) in
return item.containsString("Pen")
}
@zeeshankhan
zeeshankhan / Interview.swift
Last active Apr 13, 2016
Interview Coding Questions
View Interview.swift
// Check If a string has all unique characters, without using additional data structure.
func isUnique(string: String) -> Bool {
// what type of characters // if ascii characters
if string.characters.count > 128 {
return true
}
var cIdx = 0
for c in string.characters {
@zeeshankhan
zeeshankhan / OptionalMatching.swift
Created Oct 23, 2016
Optional value (pattern) matching through enum
View OptionalMatching.swift
import Foundation
let x: String? = nil
let y: String? = "Hello Y"
switch (x,y) {
case (.some(let a), .some(let b)):
print("So \(a) and \(b)")
case (.none, .none):
print("None")
@zeeshankhan
zeeshankhan / result.swift
Created Oct 23, 2016 — forked from damianesteban/result.swift
Swift 3 updated code with simple examples from this fantastic article: http://alisoftware.github.io/swift/async/error/2016/02/06/async-errors/
View result.swift
// A Gist.
struct Gist {
let id: String
}
typealias JSONDictionary = [String: AnyObject]
// These methods are "helpers" to transform Data -> JSON -> Result<[Gist]>
func jsonFrom(data: Data) -> Result<AnyObject> {
let json = try! JSONSerialization.jsonObject(with: data, options: [])
@zeeshankhan
zeeshankhan / ResultDemo.swift
Created Nov 7, 2016
A simple demonstration of Result
View ResultDemo.swift
import Foundation
import XCPlayground
XCPlaygroundPage.currentPage.needsIndefiniteExecution = true
typealias JSONDictionary = [String: Any]
enum SomeError : Error {
case zoError
}
View firebase-iOS-breakdown
// How to:
// 1. Go in the Firebase Analytics Dashboard
// 2. Filter iOS Platform only
// 3. Scroll down, select `Device` under the "What is your audience like?" widget
// 4. Export the CSV data (top right of the corner, there's a `...` menu with Download CSV option)
// 5. Open the file and select the iOS breakdown raw data
// 6. Replace your data with the sample data in this script
// 7. Run the script in a Xcode Playground
// 8. See the terminal output
@zeeshankhan
zeeshankhan / safari-reading-list-to-instapaper-csv.rb
Last active Jul 16, 2020
Safari Readling List to Instapaper CSV (a ruby script for macOS)
View safari-reading-list-to-instapaper-csv.rb
# 1. Open Terminal.app.
# 2. Type "cd Desktop" and Enter.
# 3. Type "open ~/Library/Safari/ ." and Enter.
# 4. Copy `Bookmarks.plist` file to the Desktop.
# 5. Back to the Terminal, type "ruby safari-readling-list-to-instapaper-csv.rb" and Enter.
# 6. Open Instapaper Settings (https://www.instapaper.com/user), and select "Import from Instapaper CSV."
# 7. Upload `instapaper-import.csv` from the Desktop.
require "plist"
require 'csv'
View Gradient.swift
import SwiftUI
import PlaygroundSupport
struct ContentView: View {
@State var gradientAngle: Double = 0
var colors = [
Color(UIColor.systemRed),
Color(UIColor.systemOrange),
Color(UIColor.systemYellow),
Color(UIColor.systemGreen),