42 lines
1.1 KiB
Plaintext
42 lines
1.1 KiB
Plaintext
// This file Copyright © Transmission authors and contributors.
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// It may be used under the MIT (SPDX: MIT) license.
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// License text can be found in the licenses/ folder.
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#import "NSMutableArrayAdditions.h"
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@implementation NSMutableArray (NSMutableArrayAdditions)
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/*
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Note: This assumes Apple implemented this as an array under the hood.
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If the underlying data structure is a linked-list, for example, then this might be less
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efficient than simply removing the object and re-adding it.
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*/
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- (void)moveObjectAtIndex:(NSUInteger)fromIndex toIndex:(NSUInteger)toIndex
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{
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if (fromIndex == toIndex)
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{
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return;
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}
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id object = self[fromIndex];
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//shift objects - more efficient than simply removing the object and re-inserting the object
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if (fromIndex < toIndex)
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{
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for (NSUInteger i = fromIndex; i < toIndex; ++i)
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{
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self[i] = self[i + 1];
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}
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}
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else
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{
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for (NSUInteger i = fromIndex; i > toIndex; --i)
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{
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self[i] = self[i - 1];
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}
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}
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self[toIndex] = object;
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}
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@end
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