Tutorial by Examples: g

If you set opacity on an element it will affect all its child elements. To set an opacity just on the background of an element you will have to use RGBA colors. Following example will have a black background with 0.6 opacity. /* Fallback for web browsers that don't support RGBa */ background-color...

Objective-C mySwitch.backgroundColor = [UIColor yellowColor]; [mySwitch setBackgroundColor: [UIColor yellowColor]]; mySwitch.backgroundColor =[UIColor colorWithRed:255/255.0 green:0/255.0 blue:0/255.0 alpha:1.0]; mySwitch.backgroundColor= [UIColor colorWithWhite: 0.5 alpha: 1.0]; mySwitch.backg...

If your project depends on the external libraries, you should first install them with opam. Assuming your dependencies are foo and bar and the main entry point of your project is foobar.ml you can then build a bytecode executable with ocamlbuild -use-ocamlfind -pkgs 'foo,bar' foobar.byte Warnin...

order allow,deny deny from 255.0.0.0 allow from all This denies access to the IP 255.0.0.0. order allow,deny deny from 123.45.6. allow from all This denies access to all IPs in the range 123.45.6.0 to 123.45.6.255.

Fortran 2003 introduced language features which can guarantee interoperability between C and Fortran (and to more languages by using C as an intermediary). These features are mostly accessed through the intrinsic module iso_c_binding: use, intrinsic :: iso_c_binding The intrinsic keyword here en...

For annotating some point of interest on map, we use pin annotation. Now, start by creating annotation object first. MKPointAnnotation *pointAnnotation = [[MKPointAnnotation alloc] init]; Now provide coordinate to pointAnnotation,as CLLocationCoordinate2D coordinate = CLLocationCoordinate2DMake...

Homebrew You can install Node.js using the Homebrew package manager. Start by updating brew: brew update You may need to change permissions or paths. It's best to run this before proceeding: brew doctor Next you can install Node.js by running: brew install node Once Node.js is installe...

Encoding //Create a Base64 Encoded NSString Object NSData *nsdata = [@"iOS Developer Tips encoded in Base64" dataUsingEncoding:NSUTF8StringEncoding]; // Get NSString from NSData object in Base64 NSString *base64Encoded = [nsdata base64EncodedStringWithOptions:0]; // Print the B...

You can find the installers on Node.js download page. Normally, Node.js recommends two versions of Node, the LTS version (long term support) and the current version (latest release). If you are new to Node, just go for the LTS and then click the Macintosh Installer button to download the package. I...

Several values of the same type can be returned by passing an output iterator to the function. This is particularly common for generic functions (like the algorithms of the standard library). Example: template<typename Incrementable, typename OutputIterator> void generate_sequence(Increment...

Null coalescing is a new operator introduced in PHP 7. This operator returns its first operand if it is set and not NULL. Otherwise it will return its second operand. The following example: $name = $_POST['name'] ?? 'nobody'; is equivalent to both: if (isset($_POST['name'])) { $name = $_P...

You can add protocols to standard classes to extends their functionality: @protocol EncodableToString <NSObject> - (NSString *)toString; @end @interface NSDictionary (XYZExtended) <EncodableToString> @end @implementation NSDictionary (XYZExtended) - (NSString *)toString { ...

Using filterUsingPredicate: This Evaluates a given predicate against the arrays content and return objects that match. Example: NSMutableArray *array = [NSMutableArray array]; [array setArray:@[@"iOS",@"macOS",@"tvOS"]]; NSPredicate *predicate = [N...

Foreword Git can work with video game development out of the box. However the main caveat is that versioning large (>5 MB) media files can be a problem over the long term as your commit history bloats - Git simply wasn't originally built for versioning binary files. The great news is that since...

When initializing a Git repository for Unity development, there are a couple of things that need to be done. Unity Ignore Folders Not everything should be versioned in the repository. You can add the template below to your .gitignore file in the root of your repository. Or alternatively, you can c...

Int("123") // Returns 123 of Int type Int("abcd") // Returns nil Int("10") // Returns 10 of Int type Int("10", radix: 2) // Returns 2 of Int type Double("1.5") // Returns 1.5 of Double type Double("abcd") // Returns nil Note that do...

When dividing two numbers pay attention to the type you want in return. Note that dividing two integers will invoke the integer division. If your goal is to run the float division, at least one of the parameters should be of float type. Integer division: 3 / 2 # => 1 Float division 3 / 3.0 ...

Outgoing ports are used as Commands, that you return from your update function. Elm side Define outgoing port: port output : () -> Cmd msg In this example we send an empty Tuple, just to trigger a subscription on the JavaScript side. To do so, we have to apply output function with an empty...

Incoming data from JavaScript is going through Subscriptions. Elm side First, we need to define an incoming port, using the following syntax: port input : (Int -> msg) -> Sub msg We can use Sub.batch if we have multiple subscriptions, this example will only contain one Subscription to in...

To send an immediate message with data to JavaScript, you have to trigger an action from your init. init : ( Model, Cmd Msg ) init = ( Model 0, send SendOutgoing ) send : msg -> Cmd msg send msg = Task.perform identity identity (Task.succeed msg)