ansonj

/// Lesson learned:
/// Inside a throwing function...
/// if a `guard` condition calls a second function that ends up throwing...
/// the second function's error is immediately propagated outside of the function.
/// Execution does not enter the `else` block of the `guard` clause.

struct PlaygroundError: Error {
    let message: String
}

ansonj

#import <Foundation/Foundation.h>

#define SAMPLE @"one sample string value"

NSString *addressOf(id object) {
    return [NSString stringWithFormat:@"%p", object];
}

int main(int argc, const char * argv[]) {
    @autoreleasepool {

ansonj

import XCTest

public func runTests(inClass testClass: XCTestCase.Type) {
    let testSuite = testClass.defaultTestSuite
    testSuite.run()
    guard let testRun = testSuite.testRun else {
        preconditionFailure("Couldn't run tests in \(testClass)")
    }
    let failCount = testRun.totalFailureCount
    guard failCount == 0 else {

ansonj

//
//  main.m
//  ArrayInitialization
//
//  Created by Anson Jablinski on 5/2/16.
//  Copyright © 2016 ForeFlight. All rights reserved.
//

#import <Foundation/Foundation.h>

ansonj

// Runs in a Playground

func repeat(function: () -> (), untilNoChangeTo sentinel: () -> String) {
    var initial, final: String
    
    do {
        initial = sentinel()
        function()
        final = sentinel()
    } while initial != final