How to resolve the algorithm Collections step by step in the Objective-C programming language
Published on 12 May 2024 09:40 PM
How to resolve the algorithm Collections step by step in the Objective-C programming language
Table of Contents
Problem Statement
Collections are abstractions to represent sets of values.
In statically-typed languages, the values are typically of a common data type.
Create a collection, and add a few values to it.
Let's start with the solution:
Step by Step solution about How to resolve the algorithm Collections step by step in the Objective-C programming language
Source code in the objective-c programming language
#import
void show_collection(id coll)
{
for ( id el in coll )
{
if ( [coll isKindOfClass: [NSCountedSet class]] ) {
NSLog(@"%@ appears %lu times", el, [coll countForObject: el]);
} else if ( [coll isKindOfClass: [NSDictionary class]] ) {
NSLog(@"%@ -> %@", el, coll[el]);
} else {
NSLog(@"%@", el);
}
}
printf("\n");
}
int main()
{
@autoreleasepool {
// create an empty set
NSMutableSet *set = [[NSMutableSet alloc] init];
// populate it
[set addObject: @"one"];
[set addObject: @10];
[set addObjectsFromArray: @[@"one", @20, @10, @"two"] ];
// let's show it
show_collection(set);
// create an empty counted set (a bag)
NSCountedSet *cset = [[NSCountedSet alloc] init];
// populate it
[cset addObject: @"one"];
[cset addObject: @"one"];
[cset addObject: @"two"];
// show it
show_collection(cset);
// create a dictionary
NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];
// populate it
dict[@"four"] = @4;
dict[@"eight"] = @8;
// show it
show_collection(dict);
}
return EXIT_SUCCESS;
}
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