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        // NSSet
        NSMutableSet *fraseChorras = [NSMutableSet set];
        [fraseChorras addObject:@"Tengo un cimbel matutino"];
        [fraseChorras addObject:@"Con la forma de un pepino"];
        [fraseChorras addObject:@"Tengo un cimbel matutino"]; // no se añade
        
        NSLog(@"El conjunto: %@", fraseChorras);
        
        
        // NSCountSet

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- (NSInteger)tableView:(UITableView *)tableView
sectionForSectionIndexTitle:(NSString *)title
               atIndex:(NSInteger)index{
    NSLog(@"Touched on section %@", title);
    
    NSInteger firstStartingWithLetter = 0;
    
    // búsqueda de la primera familia cuyo nombre empieza
    // por la letra tocada
    for (NSString *familyName in self.familyNames) {

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​- (NSInteger)tableView:(UITableView *)tableView

sectionForSectionIndexTitle:(NSString *)title

atIndex:(NSInteger)index{

NSLog(@"Touched on section %@", title);

NSInteger firstStartingWithLetter = 0;

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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
  <key>Colors</key>
	<dict>
		<key>Background</key>
		<string>0.168627 0.168627 0.207843</string>
		<key>InsertionPoint</key>
		<string>0.994444 0.988889 1</string>

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#import "AGTStarWarsCharacter.h"

@interface AGTWookie : AGTStarWarsCharacter

+(instancetype) wookie;

-(void)fullBodyWax;

@end

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#import <Foundation/Foundation.h>

@interface AGTStarWarsCharacter : NSObject

+(instancetype) starWarsCharacter;

@end

@implementation AGTStarWarsCharacter

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#import "AGTStarWarsCharacter.h"

@interface AGTWookie : AGTStarWarsCharacter

+(id) wookie;

-(void)fullBodyWax;

@end

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#import <Foundation/Foundation.h>

@interface AGTStarWarsCharacter : NSObject

+(id) starWarsCharacter;

@end

@implementation AGTStarWarsCharacter

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//  Created by Fernando Rodríguez Romero on 24/10/12.
//  Copyright (c) 2012 Agbo. All rights reserved.
//

#import <Foundation/Foundation.h>
#import <AudioToolbox/AudioToolbox.h>

int main(int argc, const char * argv[])
{

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int main(int argc,  const char * argv[],  const char *envp[], const char *apple[])
{

    // insert code here...
    NSLog(@"Printing argv:");
    for (int i = 0; i < argc; i++) {
        NSLog(@"%s\n", argv[i]);
    }
    
    NSLog(@"Printing envp");