antonio081014

import UIKit

extension UIView {
    public var isShimmering: Bool {
        get {
            return layer.mask?.animation(forKey: shimmerAnimationKey) != nil
        }
        set {
            if newValue {
                startShimmering()

oguzhanvarsak

Interview Questions for iOS Developers

1. Classes vs structs

In Swift, structs are value types whereas classes are reference types. When you copy a struct, you end up with two unique copies of the data. When you copy a class, you end up with two references to one instance of the data. It’s a crucial difference, and it affects your choice between classes or structs. (+ Class extendable, struct does not.)

2. What’s the difference between var and let? Which one would you choose for properties in a struct and why?

Both let and var are for creating variables in Swift. let helps you create immutable variables (constants) while on the other hand var creates mutable variables.

3. What does the mutating keyword mean?

The mutating keyword lets callers know that the method is going to make the value change.

warpling

//: Playground - noun: a place where people can play

import UIKit

class Mento: UIView {

    // The thickness ratio of our mento, 1.0 being a perfect sphere.
    let mentoThicknessScale: CGFloat = 0.60

    let shape: UIView = {

timonus

- (UIImage *)dynamicImage
{
    UITraitCollection *const baseTraitCollection = /* an existing trait collection */;
    UITraitCollection *const lightTraitCollection = [UITraitCollection traitCollectionWithTraitsFromCollections:@[baseTraitCollection, [UITraitCollection traitCollectionWithUserInterfaceStyle:UIUserInterfaceStyleLight]]];
    UITraitCollection *const purelyDarkTraitCollection = [UITraitCollection traitCollectionWithUserInterfaceStyle:UIUserInterfaceStyleDark];
    UITraitCollection *const darkTraitCollection = [UITraitCollection traitCollectionWithTraitsFromCollections:@[baseTraitCollection, purelyDarkTraitCollection]];
    
    __block UIImage *lightImage;
    [lightTraitCollection performAsCurrentTraitCollection:^{
        lightImage = /* draw image */;

laurenfazah

Express & Postgres via Knex

Note: <example> is meant to denote text replaced by you (including brackets).

Setup

// global dependencies
npm install -g knex

NigelEarle

Migrations & Seeding

What are migrations??

Migrations are a way to make database changes or updates, like creating or dropping tables, as well as updating a table with new columns with constraints via generated scripts. We can build these scripts via the command line using knex command line tool.

To learn more about migrations, check out this article on the different types of database migrations!

Creating/Dropping Tables

Ben-G

import Foundation
import XCTest

/// Basic sanity check that ensures that we are able to retrieve localized strings for all languages
/// we support.
final class L10NTests: XCTestCase {

    func testLocalizations() {
        let locales = ["en", "es", "zh-Hans", "zh-Hant", "fi"]
        for locale in locales {

acrookston

iOS Interview Questions

Sources include, but not limited to:

• https://izeeshan.wordpress.com/2015/03/31/interview-stuff/
• https://github.com/9magnets/iOS-Developer-and-Designer-Interview-Questions
• https://www.quora.com/What-do-startups-look-for-in-a-candidate-during-an-iOS-technical-interview-What-do-they-want-to-hear
• https://www.linkedin.com/pulse/ios-interview-questions-senior-developers-alex-bush
• https://www.raywenderlich.com/110982/swift-interview-questions-answers

In Swift, what is the difference between a struct and a class?

brennanMKE

#!/usr/bin/env xcrun swift

import Foundation

public typealias CharactersArray = [Character]
public typealias CharactersHash = [CharactersGroup : CharactersArray]

public enum CharactersGroup {
    case Letters
    case Numbers

gerlacdt

'use strict';

/*
 * Usage:
 *
 * const gracefulShutdown = require('./app/utils/gracefulShutdown');
 *
 * const server = app.listen(port, callback)
 *
 * gracefulShutdown.init(server, logger);