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[[CPLRUDictionary]] is a dictionary storing a limited set of data, with extra data filted out by last accessed time. LRU stands for Least Recently Used<ref name="tn">http://en.wikipedia.org/wiki/Cache_algorithms#Least_Recently_Used</ref>. | |||
[[CPLRUDictionary]] | <source lang="objc"> | ||
CPLRUDictionary* dict = [[CPLRUDictionary alloc] initWithMaximumCapacity:4]; | |||
[dict setObject:@"1" forKey:@"first"]; | |||
[dict setObject:@"2" forKey:@"second"]; | |||
[dict setObject:@"3" forKey:@"third"]; | |||
[dict setObject:@"4" forKey:@"fourth"]; | |||
[dict objectForKey:@"first"]; // Bump "first" as most recently used. | |||
[dict setObject:@"5" forKey:@"fifth"]; | |||
[dict setObject:@"6" forKey:@"sixth"]; | |||
NSLog(@"%@", [dict allKeys]); // Should have "first", "fourth", "fifth" and "sixth" in any order. | |||
[dict release]; | |||
</source> | </source> | ||
== | == References == | ||
<references/> | |||
== External links == | |||
{{IPFHeader|AppSupport}} | |||
Latest revision as of 16:27, 26 October 2014
CPLRUDictionary is a dictionary storing a limited set of data, with extra data filted out by last accessed time. LRU stands for Least Recently Used[1].
CPLRUDictionary* dict = [[CPLRUDictionary alloc] initWithMaximumCapacity:4];
[dict setObject:@"1" forKey:@"first"];
[dict setObject:@"2" forKey:@"second"];
[dict setObject:@"3" forKey:@"third"];
[dict setObject:@"4" forKey:@"fourth"];
[dict objectForKey:@"first"]; // Bump "first" as most recently used.
[dict setObject:@"5" forKey:@"fifth"];
[dict setObject:@"6" forKey:@"sixth"];
NSLog(@"%@", [dict allKeys]); // Should have "first", "fourth", "fifth" and "sixth" in any order.
[dict release];
References
External links
- Header: http://github.com/kennytm/iphone-private-frameworks/blob/master/AppSupport/CPLRUDictionary.h
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