Tutorial by Examples: r

You are able to append a string to a character array using fromstring() my_char_array = array('c', ['g','e','e','k']) my_char_array.fromstring("stuff") print(my_char_array) #array('c', 'geekstuff')

Detailed instructions on getting testing set up or installed.

Provided that barButtonItem has a non-null image property (e.g. set in the Interface Builder). Objective-C barButtonItem.image = [barButtonItem.image imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

An alert box can be popped-up on a Xamarin.Forms Page by the method, DisplayAlert. We can provide a Title, Body (Text to be alerted) and one/two Action Buttons. Page offers two overrides of DisplayAlert method. public Task DisplayAlert (String title, String message, String cancel) This overri...

Suppose that we have a sequence of integers and we want to create a sequence that contains only the even integers. We can obtain the latter by using the filter function of the Seq module. The filter function has the type signature ('a -> bool) -> seq<'a> -> seq<'a>; this indicat...

-(void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSString *,id> *)change context:(void *)context Context is important if you ship your class for others to use.Context lets your class observer verify that its you observer which is being called. The ...

If you are using library that contains (for example) AwesomeViewController with a wrong status bar color you can try this: let awesomeViewController = AwesomeViewController() awesomeViewController.navigationBar.barStyle = .blackTranslucent // or other style

Click the “Move examples” button Select the examples you want to move Click “Move” Select “Search for a Topic” Paste the URL of the topic in the search box Click “Move Examples”. Click “Submit Drafts” or “Edit Drafts”

An interface is declared like a class, but without access modifiers (public, private, ...). Also, no definitions are allowed, so variables and constants can't be used. Interfaces should always have an Unique Identifier, which can be generated by pressing Ctrl + Shift + G. IRepository = interface ...

Classes can implement more than one interface, as opposed to inheriting from more than one class (Multiple Inheritance) which isn't possible for Delphi classes. To achieve this, the name of all interfaces must be added comma-separated behind the base class. Of course, the implementing class must al...

Interfaces can inherit from each other, exactly like classes do, too. An implementing class thus has to implement functions of the interface and all base interfaces. This way, however, the compiler doesn't know that the implenting class also implements the base interface, it only knows of the interf...

Since the declaration of variables in interfaces isn't possible, the "fast" way of defining properites (property Value: TObject read FValue write FValue;) can't be used. Instead, the Getter and setter (each only if needed) have to be declared in the interface, too. IInterface = interface(...

First obtain the Microsoft.CodeAnalysis.CSharp.Workspaces nuget before continuing. var workspace = Microsoft.CodeAnalysis.MSBuild.MSBuildWorkspace.Create(); var project = await workspace.OpenProjectAsync(projectFilePath); var compilation = await project.GetCompilationAsync(); foreach (var diag...

A Syntax Tree is an immutable data structure representing the program as a tree of names, commands and marks (as previously configured in the editor.) For example, assume a Microsoft.CodeAnalysis.Compilation instance named compilation has been configured. There are multiple ways to list the names o...

Name-based virtual hosting on Apache is described on the Apache website as such: With name-based virtual hosting, the server relies on the client to report the hostname as part of the HTTP headers. Using this technique, many different hosts can share the same IP address. Therefore, more than...

This command will save the open file with sudo rights :w !sudo tee % >/dev/null You can also map w!! to write out a file as root :cnoremap w!! w !sudo tee % >/dev/null

Add this to your $MYVIMRC: " Source vim configuration file whenever it is saved if has ('autocmd') " Remain compatible with earlier versions augroup Reload_Vimrc " Group name. Always use a unique name! autocmd! " Clear any preexisting autoc...

:autocmd BufWritePost * if &diff | diffupdate | endif

Get NSData from Hexadecimal String + (NSData *)dataFromHexString:(NSString *)string { string = [string lowercaseString]; NSMutableData *data= [NSMutableData new]; unsigned char whole_byte; char byte_chars[3] = {'\0','\0','\0'}; int i = 0; int length = (int) string.len...

An SSH key has two pieces, the public key and the private key. The private key: Is usually in a file named id_rsa, but it can be given any name. CANNOT BE REGENERATED IF LOST!!!! Do not lose this file! If you lose it, you will not be able to get back into your instance. (StackOverflow is li...