51 lines
1.1 KiB
Objective-C
51 lines
1.1 KiB
Objective-C
#import <Foundation/Foundation.h>
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void show_collection(id coll)
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{
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for ( id el in coll )
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{
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if ( [coll isKindOfClass: [NSCountedSet class]] ) {
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NSLog(@"%@ appears %lu times", el, [coll countForObject: el]);
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} else if ( [coll isKindOfClass: [NSDictionary class]] ) {
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NSLog(@"%@ -> %@", el, coll[el]);
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} else {
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NSLog(@"%@", el);
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}
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}
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printf("\n");
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}
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int main()
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{
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@autoreleasepool {
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// create an empty set
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NSMutableSet *set = [[NSMutableSet alloc] init];
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// populate it
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[set addObject: @"one"];
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[set addObject: @10];
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[set addObjectsFromArray: @[@"one", @20, @10, @"two"] ];
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// let's show it
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show_collection(set);
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// create an empty counted set (a bag)
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NSCountedSet *cset = [[NSCountedSet alloc] init];
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// populate it
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[cset addObject: @"one"];
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[cset addObject: @"one"];
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[cset addObject: @"two"];
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// show it
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show_collection(cset);
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// create a dictionary
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NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];
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// populate it
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dict[@"four"] = @4;
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dict[@"eight"] = @8;
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// show it
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show_collection(dict);
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}
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return EXIT_SUCCESS;
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}
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