Write Objective C like a boss.
A set of functional additions for Foundation you wish you'd had in the first place.
-
Install via CocoaPods
pod 'ObjectiveSugar' -
Import the public header
#import <ObjectiveSugar/ObjectiveSugar.h>
NSNumber additions
[@3 times:^{
NSLog(@"Hello!");
}];
// Hello!
// Hello!
// Hello!
[@3 timesWithIndex:^(NSUInteger index) {
NSLog(@"Another version with number: %d", index);
}];
// Another version with number: 0
// Another version with number: 1
// Another version with number: 2
[@1 upto:4 do:^(NSInteger numbah) {
NSLog(@"Current number.. %d", numbah);
}];
// Current number.. 1
// Current number.. 2
// Current number.. 3
// Current number.. 4
[@7 downto:4 do:^(NSInteger numbah) {
NSLog(@"Current number.. %d", numbah);
}];
// Current number.. 7
// Current number.. 6
// Current number.. 5
// Current number.. 4
NSDate *firstOfDecember = [NSDate date]; // let's pretend it's 1st of December
NSDate *firstOfNovember = [@30.days since:firstOfDecember];
// 2012-11-01 00:00:00 +0000
NSDate *christmas = [@7.days until:newYearsDay];
// 2012-12-25 00:00:00 +0000
NSDate *future = @24.days.fromNow;
// 2012-12-25 20:49:05 +0000
NSDate *past = @1.month.ago;
// 2012-11-01 20:50:28 +00:00-- NSArray / NSSet additions
// All of these methods return a modified copy of the array.
// They're not modifying the source array.
NSArray *cars = @[@"Testarossa", @"F50", @"F458 Italia"]; // or NSSet
[cars each:^(id object) {
NSLog(@"Car: %@", object);
}];
// Car: Testarossa
// Car: F50
// Car: F458 Italia
[cars eachWithIndex:^(id object, NSUInteger index) {
NSLog(@"Car: %@ index: %i", object, index);
}];
// Car: Testarossa index: 0
// Car: F50 index: 1
// Car: F458 Italia index: 2
[cars each:^(id object) {
NSLog(@"Car: %@", object);
} options:NSEnumerationReverse];
// Car: F458 Italia
// Car: F50
// Car: Testarossa
[cars eachWithIndex:^(id object, NSUInteger index) {
NSLog(@"Car: %@ index: %i", object, index);
} options:NSEnumerationReverse];
// Car: F458 Italia index: 2
// Car: F50 index: 1
// Car: Testarossa index: 0
[cars map:^(NSString* car) {
return car.lowercaseString;
}];
// testarossa, f50, f458 italia
// Or, a more common example:
[cars map:^(NSString* carName) {
return [[Car alloc] initWithName:carName];
}];
// array of Car objects
NSArray *mixedData = @[ @1, @"Objective Sugar!", @"Github", @4, @"5"];
[mixedData select:^BOOL(id object) {
return ([object class] == [NSString class]);
}];
// Objective Sugar, Github, 5
[mixedData reject:^BOOL(id object) {
return ([object class] == [NSString class]);
}];
// 1, 4
NSArray *numbers = @[ @5, @2, @7, @1 ];
[numbers sort];
// 1, 2, 5, 7
cars.sample
// 458 Italia
cars.sample
// F50
-- NSArray only
NSArray *numbers = @[@1, @2, @3, @4, @5, @6];
// index from 2 to 4
numbers[@"2..4"];
// [@3, @4, @5]
// index from 2 to 4 (excluded)
numbers[@"2...4"];
// [@3, @4]
// With NSRange location: 2, length: 4
numbers[@"2,4"];
// [@3, @4, @5, @6]
NSValue *range = [NSValue valueWithRange:NSMakeRange(2, 4)];
numbers[range];
// [@3, @4, @5, @6]
[numbers reverse];
// [@6, @5, @4, @3, @2, @1]
NSArray *fruits = @[ @"banana", @"mango", @"apple", @"pear" ];
[fruits includes:@"apple"];
// YES
[fruits take:3];
// banana, mango, apple
[fruits takeWhile:^BOOL(id fruit) {
return ![fruit isEqualToString:@"apple"];
}];
// banana, mango
NSArray *nestedArray = @[ @[ @1, @2, @3 ], @[ @4, @5, @6, @[ @7, @8 ] ], @9, @10 ];
[nestedArray flatten];
// 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
NSArray *abc = @[ @"a", @"b", @"c" ];
[abc join];
// abc
[abc join:@"-"];
// a-b-c
NSArray *mixedData = @[ @1, @"Objective Sugar!", @"Github", @4, @"5"];
[mixedData detect:^BOOL(id object) {
return ([object class] == [NSString class]);
}];
// Objective Sugar
// TODO: Make a better / simpler example of this
NSArray *landlockedCountries = @[ @"Bolivia", @"Paraguay", @"Austria", @"Switzerland", @"Hungary" ];
NSArray *europeanCountries = @[ @"France", @"Germany", @"Austria", @"Spain", @"Hungary", @"Poland", @"Switzerland" ];
[landlockedCountries intersectionWithArray:europeanCountries];
// landlockedEuropeanCountries = Austria, Switzerland, Hungary
[landlockedCountries unionWithArray:europeanCountries];
// landlockedOrEuropean = Bolivia, Paraguay, Austria, Switzerland, Hungary, France, Germany, Spain, Poland
[landlockedCountries relativeComplement:europeanCountries];
// nonEuropeanLandlockedCountries = Bolivia, Paraguay
[europeanCountries relativeComplement:landlockedCountries];
// notLandlockedEuropeanCountries = France, Germany, Spain, Poland
[landlockedCountries symmetricDifference:europeanCountries];
// uniqueCountries = Bolivia, Paraguay, France, Germany, Spain, Poland-- NSMutableArray additions
NSMutableArray *people = @[ @"Alice", @"Benjamin", @"Christopher" ];
[people push:@"Daniel"]; // Alice, Benjamin, Christopher, Daniel
[people pop]; // Daniel
// people = Alice, Benjamin, Christopher
[people pop:2]; // Benjamin, Christopher
// people = Alice
[people concat:@[ @"Evan", @"Frank", @"Gavin" ]];
// people = Alice, Evan, Frank, Gavin
[people keepIf:^BOOL(id object) {
return [object characterAtIndex:0] == 'E';
}];
// people = Evan
-- NSDictionary additions
NSDictionary *dict = @{ @"one" : @1, @"two" : @2, @"three" : @3 };
[dict each:^(id key, id value){
NSLog(@"Key: %@, Value: %@", key, value);
}];
// Key: one, Value: 1
// Key: two, Value: 2
// Key: three, Value: 3
[dict eachKey:^(id key) {
NSLog(@"Key: %@", key);
}];
// Key: one
// Key: two
// Key: three
[dict eachValue:^(id value) {
NSLog(@"Value: %@", value);
}];
// Value: 1
// Value: 2
// Value: 3
[dict invert];
// { 1 = one, 2 = two, 3 = three}
NSDictionary *errors = @{
@"username" : @[ @"already taken" ],
@"password" : @[ @"is too short (minimum is 8 characters)", @"not complex enough" ],
@"email" : @[ @"can't be blank" ];
};
[errors map:^(id attribute, id reasons) {
return NSStringWithFormat(@"%@ %@", attribute, [reasons join:@", "]);
}];
// username already taken
// password is too short (minimum is 8 characters), not complex enough
// email can't be blank
[errors hasKey:@"email"]
// true
[errors hasKey:@"Alcatraz"]
// false-- NSString additions
NSString *sentence = NSStringWithFormat(@"This is a text-with-argument %@", @1234);
// This is a text-with-argument 1234
[sentence split];
// array = this, is, a, text-with-argument, 1234
[sentence split:@"-"]
// array = this is a text, with, argument 1234
[sentence containsString:@"this is a"];
// YES
[sentence match:@"-[a-z]+-"]
// -with--- C additions
unless(_messages) {
// The body is only executed if the condition is false
_messages = [self initializeMessages];
}
int iterations = 10;
until(iterations == 0) {
// The body is executed until the condition is false
// 10 9 8 7 6 5 4 3 2 1
printf("%d ", iterations);
iterations--;
}
printf("\n");
iterations = 10;
do {
// The body is executed at least once until the condition is false
// Will print: Executed!
printf("Executed!\n");
} until(true);ObjectiveSugar is tested with Kiwi, and tests are located in Example.
If you plan on contributing to the project, please:
- Write tests
- Write documentation
- Marin Usalj @supermarin
- Neil Cowburn @neilco