Stack.m
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//
// Stack.m
// DUREX test
//
// Created by Imanol Barba on 5/23/14.
// Copyright (c) 2014 Emmoco. All rights reserved.retur
//
#import "Stack.h"
@interface Stack ()
@property (strong,nonatomic) NSMutableArray *dataArray;
@property (nonatomic) NSUInteger lastPosition;
@end
@implementation Stack
- (id) init
{
self = [super init];
[self setLastPosition: 0];
[self setDataArray:[[NSMutableArray alloc] init]];
return self;
}
- (void) push: (id) element
{
[[self dataArray] addObject:element];
[self setLastPosition: [self lastPosition] + 1];
}
- (id) pop
{
id element;
[self setLastPosition: [self lastPosition] - 1];
element = [[self dataArray] objectAtIndex:[self lastPosition]];
[[self dataArray] removeLastObject];
return element;
}
- (NSInteger) count
{
return [[self dataArray] count];
}
- (void) clear
{
[[self dataArray] removeAllObjects];
}
@end