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41 lines
1.6 KiB
Objective-C
41 lines
1.6 KiB
Objective-C
//
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// NSArray+FLEX.h
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// FLEX
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//
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// Created by Tanner Bennett on 9/25/19.
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// Copyright © 2020 FLEX Team. All rights reserved.
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//
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#import <Foundation/Foundation.h>
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@interface NSArray<T> (Functional)
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/// Actually more like flatmap, but it seems like the objc way to allow returning nil to omit objects.
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/// So, return nil from the block to omit objects, and return an object to include it in the new array.
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/// Unlike flatmap, however, this will not flatten arrays of arrays into a single array.
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- (__kindof NSArray *)flex_mapped:(id(^)(T obj, NSUInteger idx))mapFunc;
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/// Like flex_mapped, but expects arrays to be returned, and flattens them into one array.
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- (__kindof NSArray *)flex_flatmapped:(NSArray *(^)(id, NSUInteger idx))block;
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- (instancetype)flex_filtered:(BOOL(^)(T obj, NSUInteger idx))filterFunc;
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- (void)flex_forEach:(void(^)(T obj, NSUInteger idx))block;
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/// Unlike \c subArrayWithRange: this will not throw an exception if \c maxLength
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/// is greater than the size of the array. If the array has one element and
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/// \c maxLength is greater than 1, you get an array with 1 element back.
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- (instancetype)flex_subArrayUpto:(NSUInteger)maxLength;
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+ (instancetype)flex_forEachUpTo:(NSUInteger)bound map:(T(^)(NSUInteger i))block;
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+ (instancetype)flex_mapped:(id<NSFastEnumeration>)collection block:(id(^)(T obj, NSUInteger idx))mapFunc;
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- (instancetype)flex_sortedUsingSelector:(SEL)selector;
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- (T)flex_firstWhere:(BOOL(^)(T obj))meetingCriteria;
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@end
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@interface NSMutableArray<T> (Functional)
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- (void)flex_filter:(BOOL(^)(T obj, NSUInteger idx))filterFunc;
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@end
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