55 lines
2.1 KiB
Objective-C
55 lines
2.1 KiB
Objective-C
/******************************************************************************
|
|
* Copyright (c) 2011-2012 Transmission authors and contributors
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
|
* DEALINGS IN THE SOFTWARE.
|
|
*****************************************************************************/
|
|
|
|
#import "NSMutableArrayAdditions.h"
|
|
|
|
@implementation NSMutableArray (NSMutableArrayAdditions)
|
|
|
|
/*
|
|
Note: This assumes Apple implemented this as an array under the hood.
|
|
If the underlying data structure is a linked-list, for example, then this might be less
|
|
efficient than simply removing the object and re-adding it.
|
|
*/
|
|
- (void) moveObjectAtIndex: (NSUInteger) fromIndex toIndex: (NSUInteger) toIndex
|
|
{
|
|
if (fromIndex == toIndex)
|
|
return;
|
|
|
|
id object = self[fromIndex];
|
|
|
|
//shift objects - more efficient than simply removing the object and re-inserting the object
|
|
if (fromIndex < toIndex)
|
|
{
|
|
for (NSUInteger i = fromIndex; i < toIndex; ++i)
|
|
self[i] = self[i+1];
|
|
}
|
|
else
|
|
{
|
|
for (NSUInteger i = fromIndex; i > toIndex; --i)
|
|
self[i] = self[i-1];
|
|
}
|
|
self[toIndex] = object;
|
|
|
|
}
|
|
|
|
@end
|