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28 lines
821 B
C
28 lines
821 B
C
5 years ago
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// Copyright (c) 2019 Open Whisper Systems. All rights reserved.
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//
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#import <Foundation/Foundation.h>
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NS_ASSUME_NONNULL_BEGIN
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@interface NSArray (FunctionalUtil)
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/// Returns true when any of the items in this array match the given predicate.
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- (bool)any:(int (^)(id item))predicate;
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/// Returns true when all of the items in this array match the given predicate.
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- (bool)all:(int (^)(id item))predicate;
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/// Returns an array of all the results of passing items from this array through the given projection function.
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- (NSArray *)map:(id (^)(id item))projection;
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/// Returns an array of all the results of passing items from this array through the given projection function.
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- (NSArray *)filter:(int (^)(id item))predicate;
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- (NSDictionary *)groupBy:(id (^)(id value))keySelector;
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@end
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NS_ASSUME_NONNULL_END
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