Tutorial by Examples: w

Using Error Handling to make Struct(or class) initializer as throwable initializer: Example Error Handling enum: enum ValidationError: Error { case invalid } You can use Error Handling enum to check the parameter for the Struct(or class) meet expected requirement struct User { let ...

Toasts are generally used when we want to display an information to the user regarding some action that has successfully (or not) happened and this action does not require the user to take any other action. Like when a message has been sent, for example: Toast.makeText(this, "Message Sent!&quo...

From Apple documentation for IV, This parameter is ignored if ECB mode is used or if a stream cipher algorithm is selected. func AESEncryption(key: String) -> String? { let keyData: NSData! = (key as NSString).data(using: String.Encoding.utf8.rawValue) as NSData! ...

SELECT * FROM MY_TABLE

The Java Native Interface (JNI) allows you to call Java functions from native code. Here is a simple example of how to do it: Java code: package com.example.jniexample; public class JNITest { public static int getAnswer(bool) { return 42; } } Native code: int getTheAnswer(...

private static void saveItem(List<EventTracker> items) { List<WriteRequest> wrList = new ArrayList<>(); try { for (EventTracker item : items) { WriteRequest wreqItem; wreqItem = getWriteRequest(item); wrList.add(wreqItem);...

private static WriteRequest getWriteRequest(EventTracker event) { WriteRequest wreq = null;// = new WriteRequest(); if (event != null) { Map<String, AttributeValue> attributeMap = new HashMap<String, AttributeValue>(); addAttribute(attributeMap, "ev...

To simply open a URL, use the webbrowser.open() method: import webbrowser webbrowser.open("http://stackoverflow.com") If a browser window is currently open, the method will open a new tab at the specified URL. If no window is open, the method will open the operating system's default b...

The webbrowser module also supports different browsers using the register() and get() methods. The get method is used to create a browser controller using a specific executable's path and the register method is used to attach these executables to preset browser types for future use, commonly when mu...

Currently (as of version 2.11.0) there is no built-in functionality to move an already existing worktree. This is listed as an official bug (see https://git-scm.com/docs/git-worktree#_bugs). To get around this limitation it is possible to perform manual operations directly in the .git reference fil...

Understanding the concept To understand content negotiation in Web API, it is important to understand the term Resource. On the web, any information that we can access can be referred as HTTP resource. There is a tremendous amount of material to view on the web which has different content type suc...

public override void DidEnterBackground(UIApplication application) { //to add the background image in place of 'active' image var backgroundImage = new UIImageView(); backgroundImage.Tag = 1234; backgroundImage.Image = UIImage.FromBundle("Background"); background...

Atom is a hackable text editor created by GitHub and developed on top of the Electron desktop application platform. This means it can be used as a text editor for basic programming up to a full-sized IDE. It is also extremely customisable, it provides thousands of community-made packages (syntax hi...

Using the official installer Download the installer from the official website. It will automatically add atom and apm (Atom Package Manager) to your %PATH% variable. Building from source Requirements: Node.js 4.4.x or later Python 2.7.x 7zip Visual Studio (One of the versions below) Visu...

To view your installed packages or themes, open settings with Ctrl+, and select either the "Packages" or "Themes" tab in the left-hand navigation bar. Note, the packages or themes you installed from other publishers will show up under the "Community Themes" section and ...

Yellowdog Updater, Modified, one of the last remaining vestiges of Yellow Dog Linux, is the package manager used by Red Hat, Fedora, and CentOS systems and their derivatives. It can handle the installation and removal of software packaged as rpms for these Linux distributions. Below are some simple...

Pushd "D:\Foo" Dir Popd Pushd will change the directory to the directory following (in this case D:\Foo. Popd returns back to the original directory.

You can get your working folder by calling the method getFilesDir() on your Activity (Activity is the central class in your application that inherits from Context. See here). Reading is not different. Only your application will have access to this folder. Your activity could contain the following c...

File myFile = new File(getFilesDir(), "myData.bin"); FileOutputStream out = new FileOutputStream(myFile); // Write four bytes one two three four: out.write(new byte [] { 1, 2, 3, 4} out.close() There is nothing Android specific with this code. If you write lots of small ...

You can also read and write from/to memory card (SD card) that is present in many Android devices. Files in this location can be accessed by other programs, also directly by the user after connecting device to PC via USB cable and enabling MTP protocol. Finding the SD card location is somewhat more...