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# Source: 
# https://stackoverflow.com/questions/3971822/how-do-i-validate-my-yaml-file-from-command-line

$ ruby -e "require 'yaml';puts YAML.load_file('some-file.yaml')"
$ perl -MYAML -e 'use YAML;YAML::LoadFile("./file.yaml")'
$ python -c "from yaml import load, Loader; load(open('.travis.yml'), Loader=Loader)"
$ travis lint .travis.yml

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UISwitch * uis = [[[UISwitch alloc] init] autorelease];
[uis addTarget:self action:@selector(toogleSwitch:) forControlEvents:UIControlEventValueChanged];

NSString * key = [[sets objectAtIndex:[indexPath section]] objectForKey:SOME_KEY];
uis.on = [[[NSUserDefaults standardUserDefaults] valueForKey:key] boolValue];

uis.tag = [indexPath section];

cell.accessoryView = uis;

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#import <UIKit/UIKit.h>

@interface MyOwnTableViewCell : UITableViewCell

@end

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// Trimming white spaces and new line characters from a NSString
NSString *s = @"  hellow world.  ";
NSString *trimmedString= [s stringByTrimmingCharactersInSet: [NSCharacterSet whitespaceAndNewlineCharacterSet]];

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// Example for UIControlStateNormal
[yourbutton setTitleColor:<your color> forState:UIControlStateNormal];

// Example for UIControlStateHighlighted
[yourbutton setTitleColor:<your color> forState:UIControlStateHighlighted];

// And so on...

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cell.textLabel.highlightedTextColor = <your color>;

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cell.selectedBackgroundView = [[[UIView alloc] initWithFrame:CGRectZero] autorelease];
cell.selectedBackgroundView.backgroundColor = <your color>;

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dispatch_async(dispatch_get_main_queue(), ^{ 
    /* your code */ 
});

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//
//  SomeViewController.m
//
- (IBAction)doShowSomething:(id)sender
{
    UINavigationController *nav = [[[UINavigationController alloc]init] autorelease];
    MyViewController *av = [[[MyViewController alloc] init] autorelease];

    [nav pushViewController:av animated:NO];
    

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// Horizontal flip transition of a modal view
MyViewController *av = [[[MyViewController alloc] init] autorelease];
[av setModalTransitionStyle:UIModalTransitionStyleFlipHorizontal];
[av setModalPresentationStyle:UIModalPresentationCurrentContext];
[self presentModalViewController:av animated:YES];
[av release];