Ayuna Vogel ayunav

Studying for a Tech Interview Sucks, so Here's a Cheat Sheet to Help

This list is meant to be a both a quick guide and reference for further research into these topics. It's basically a summary of that comp sci course you never took or forgot about, so there's no way it can cover everything in depth. It also will be available as a gist on Github for everyone to edit and add to.

Data Structure Basics

###Array ####Definition:

Stores data elements based on an sequential, most commonly 0 based, index.
Based on tuples from set theory.

	import Foundation

	enum MeetupAPI {

	// MARK: - Properties

	static let url = URL(string: "https://api.meetup.com/find/events?&sign=true&photo-host=public")

	static let session: URLSession = {
	let config = URLSessionConfiguration.default

	// provide here the image that you want to upload, and
	// a value between 0 and 1 where 1 is the highest quality
	// https://developer.apple.com/reference/uikit/1624115-uiimagejpegrepresentation

	let imageData = UIImageJPEGRepresentation(image, 0.8)

	let url = yourUrl

	Alamofire.upload(multipartFormData: { multipartFormData in

	-(void)locationManager:(CLLocationManager )manager didEnterRegion:(CLRegion )region {

	NSArray <NLGoal> allGoals = [NLGoal goalsForCurrentUser];

	UILocalNotification *localNotification = [[UILocalNotification alloc] init];
	localNotification.alertTitle = @"Neverlate";
	localNotification.timeZone = [NSTimeZone defaultTimeZone];
	localNotification.fireDate = [NSDate date];

	__weak typeof(self) weakSelf = self;

	func stringIsAnagram(str1: String, str2 : String) -> Bool {
	var dict1 = [Character: Int]()
	var dict2 = [Character: Int]()

	var count = 0

	for char in str1.characters {
	if (dict1[char] != nil) {
	dict1[char] = count++
	} else {

	func profile(block:(()->())) {
	let start = NSDate()
	block()
	let end = NSDate()
	print(end.timeIntervalSinceDate(start))
	}

	//run your function/code inside the block below
	profile({

	struct AudioChannel {

	static var maxInputLevelForAllChannels = 0

	}

	//
	// FSQSplitViewController.h
	//
	// Copyright (c) 2015 Foursquare. All rights reserved.
	//

	#import "FSCoreViewController.h"

	NS_ASSUME_NONNULL_BEGIN;


	- (UITableViewCell )tableView:(UITableView )tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

	// Get your cell here

	cell.backgroundColor = [UIColor colorWithHue:(float)indexPath.row/[collectionView numberOfItemsInSection:indexPath.section] saturation:0.8 brightness:1 alpha:1];

	// Do more stuff here

	}