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khanlou / Fonts.swift
Created Oct 6, 2016
Print all fonts in Swift 3
View Fonts.swift
UIFont.familyNames.forEach({ familyName in
let fontNames = UIFont.fontNames(forFamilyName: familyName)
print(familyName, fontNames)
View ProbingDictionary.swift
import Foundation
struct ProbingDictionary<Key: Hashable, Value> {
enum Item: CustomStringConvertible {
case element(Key, Value)
case empty
case tombstone
var isEmpty: Bool {
if case .empty = self {
View NilError.swift
public struct NilError: Error, CustomStringConvertible {
let file: String
let line: Int
public init(file: String = #file, line: Int = #line) {
self.file = file
self.line = line
View SafeSyncQueue.swift
import Foundation
final class SafeSyncQueue {
struct QueueIdentity {
let label: String
let queue: DispatchQueue
khanlou / Swift2.swift
Last active Jun 8, 2019
`any`, `all`, `none`, `first`, and `count` on SequenceType in Swift
View Swift2.swift
import Foundation
extension SequenceType {
func any(@noescape predicate: (Self.Generator.Element) throws -> Bool) rethrows -> Bool {
for element in self {
let result = try predicate(element)
if result {
return true
View SafeDecodableArray.swift
import Foundation
Decode an array of objects while simply omitting any nested objects that themselves fail to be decoded.
Inspired by
struct SafeDecodableArray<T: Decodable>: Decodable {
An intermediate type that always succeeds at being decoded. Necessary because when iterating the
View ObjectStorage.swift
// ObjectStorage.swift
// Soroush Khanlou
// Created by Soroush Khanlou on 3/8/19.
// Copyright © 2019 Soroush Khanlou. All rights reserved.
import Foundation
khanlou / MD5StringTest.swift
Last active Apr 12, 2019
MD5 and SHA1 on String in Swift 3
View MD5StringTest.swift
import XCTest
@testable import <#project#>
class StringMD5Test: XCTestCase {
func testMD5() {
let string = "soroush khanlou"
XCTAssertEqual(string.md5, "954d741d14b14002d1ba88f600eee635")
khanlou / Sequence+Arithmetic.swift
Last active Mar 20, 2019
Sum on Sequence and Average on Array in Swift 4
View Sequence+Arithmetic.swift
extension Sequence where Self.Iterator.Element: Numeric {
var sum: Self.Iterator.Element {
return self.reduce(0, +)
extension Collection where Element: BinaryFloatingPoint {
var average: Element {
return self.reduce(0, +) / Element((0 as IndexDistance).distance(to: self.count))
View ZipWithDefaults.swift
let zipped = zip([1,2,3], default: 0, ["a"], default: "-")
let zippedSameType = zip([1,2,3], [1], default: 0)
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