xtinger

let maximumNumberOfLoginAttempts = 10
var currentLoginAttempt = 0
var x = 0.0, y = 0.0, z = 0.0
var welcomeMessage: String
var red, green, blue: Double
let π = 3.14159
let 你好 = "你好世界"
let 🐶🐮 = "dogcow"

print(friendlyWelcome)

xtinger

// How to do lots of cool things with NSArray.Inspired by NSHipster and WWDC 2013 Session 228 - "Hidden Gems in Cocoa and Cocoa Touch"


NSArray *albums = @[[Album albumWithName:@"Random Access Memories" price:9.99f],
          [Album albumWithName:@"Clarity" price:6.99f],
          [Album albumWithName:@"Weekend in America" price:7.99f],
          [Album albumWithName:@"Weekend in America" price:7.90f],
          [Album albumWithName:@"Bangarang EP" price:2.99f]];

// Reversing an Array

xtinger

#define XGRunOnMainThread  _Pragma("clang diagnostic push") _Pragma("clang diagnostic ignored \"-Warc-performSelector-leaks\"") \
    if (![NSThread isMainThread]) { dispatch_sync(dispatch_get_main_queue(), ^{ [self performSelector:_cmd]; }); return; };

xtinger

void dispatch_once_on_main_thread(dispatch_once_t *predicate,
                                  dispatch_block_t block) {
    if ([NSThread isMainThread]) {
        dispatch_once(predicate, block);
    } else {
        if (DISPATCH_EXPECT(*predicate == 0L, NO)) {
            dispatch_sync(dispatch_get_main_queue(), ^{
                dispatch_once(predicate, block);
            });
        }

xtinger

NSLog(@"%@",[[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding]);

xtinger

@interface NSArray (EnumExtensions)

- (NSString*) stringWithEnum: (NSUInteger) enumVal;
- (NSUInteger) enumFromString: (NSString*) strVal default: (NSUInteger) def;
- (NSUInteger) enumFromString: (NSString*) strVal;

@end

@implementation NSArray (EnumExtensions)

xtinger

As a local variable:
returnType (^blockName)(parameterTypes) = ^returnType(parameters) {...};

As a property:
@property (nonatomic, copy) returnType (^blockName)(parameterTypes);

As a method parameter:
- (void)someMethodThatTakesABlock:(returnType (^)(parameterTypes))blockName;

As an argument to a method call: