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/**
NSArray-additions.m
Various methods for NSArray
Copyright (c) 2002 Free Software Foundation
Written by: Stefan Urbanek <urbanek@host.sk>
This file is part of the StepTalk project.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#import "NSArray+additions.h"
#import "NSNumber+additions.h"
#import "STBlock.h"
#import <Foundation/NSAutoreleasePool.h>
#import <Foundation/NSEnumerator.h>
#import <StepTalk/STExterns.h>
@implementation NSArray (STCollecting)
- do:(STBlock *)block
{
NSEnumerator *enumerator;
id object;
id retval = nil;
enumerator = [self objectEnumerator];
while( (object = [enumerator nextObject]) )
{
retval = [block value:object];
}
return retval;
}
- select:(STBlock *)block
{
NSMutableArray *array;
NSEnumerator *enumerator;
id object;
id value;
array = [NSMutableArray array];
enumerator = [self objectEnumerator];
while( (object = [enumerator nextObject]) )
{
value = [block value:object];
if([(NSNumber *)value isTrue])
{
[array addObject:object];
}
}
return [NSArray arrayWithArray:array];
}
- reject:(STBlock *)block
{
NSMutableArray *array;
NSEnumerator *enumerator;
id object;
id value;
array = [NSMutableArray array];
enumerator = [self objectEnumerator];
while( (object = [enumerator nextObject]) )
{
value = [block value:object];
if([(NSNumber *)value isFalse])
{
[array addObject:object];
}
}
return [NSArray arrayWithArray:array];
}
- collect:(STBlock *)block
{
NSMutableArray *array;
NSEnumerator *enumerator;
id object;
id value;
array = [NSMutableArray array];
enumerator = [self objectEnumerator];
while( (object = [enumerator nextObject]) )
{
value = [block value:object];
if (value == nil)
value = STNil;
[array addObject:value];
}
return [NSArray arrayWithArray:array];
}
- detect:(STBlock *)block
{
NSEnumerator *enumerator;
id object;
id retval = nil;
enumerator = [self objectEnumerator];
while( (object = [enumerator nextObject]) )
{
retval = [block value:object];
if([(NSNumber *)retval isTrue])
{
return object;
}
}
return retval;
}
@end
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