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30 lines
1.1 KiB
Objective-C
30 lines
1.1 KiB
Objective-C
//
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// NSIndexSet+ASHelpers.h
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// Texture
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//
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// Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
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// Changes after 4/13/2017 are: Copyright (c) Pinterest, Inc. All rights reserved.
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// Licensed under Apache 2.0: http://www.apache.org/licenses/LICENSE-2.0
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//
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#import <Foundation/Foundation.h>
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@interface NSIndexSet (ASHelpers)
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- (NSIndexSet *)as_indexesByMapping:(NSUInteger (^)(NSUInteger idx))block;
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- (NSIndexSet *)as_intersectionWithIndexes:(NSIndexSet *)indexes;
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/// Returns all the item indexes from the given index paths that are in the given section.
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+ (NSIndexSet *)as_indexSetFromIndexPaths:(NSArray<NSIndexPath *> *)indexPaths inSection:(NSUInteger)section;
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/// If you've got an old index, and you insert items using this index set, this returns the change to get to the new index.
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- (NSUInteger)as_indexChangeByInsertingItemsBelowIndex:(NSUInteger)index;
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- (NSString *)as_smallDescription;
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/// Returns all the section indexes contained in the index paths array.
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+ (NSIndexSet *)as_sectionsFromIndexPaths:(NSArray<NSIndexPath *> *)indexPaths;
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@end
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