Tutorial by Examples: reat

git checkout --orphan new-orphan-branch The first commit made on this new branch will have no parents and it will be the root of a new history totally disconnected from all the other branches and commits. source

With local image Swift let image = UIImage(named: "imageFromBundleOrAsset") Objective-C UIImage *image = [UIImage imageNamed:@"imageFromBundleOrAsset"]; Note The method imageNamed caches the image's contents to memory. Loading many large images that way can cause low...

There are several ways to create an Observable in RxJava. The most powerful way is to use the Observable.create method. But it's also the most complicated way. So you must avoid using it, as much as possible. Emitting an exiting value If you already have a value, you can use Observable.just to emi...

Create a class which extends Service class and in overridden method onBind return your local binder instance: public class LocalService extends Service { // Binder given to clients private final IBinder mBinder = new LocalBinder(); /** * Class used for the client Binder. Bec...

Describe your service access interface through .aidl file: // IRemoteService.aidl package com.example.android; // Declare any non-default types here with import statements /** Example service interface */ interface IRemoteService { /** Request the process ID of this service, to do evil...

This is an extension of Basic Example: Basic Structure import React, { Component } from 'react'; import { render } from 'react-dom'; class FirstComponent extends Component { render() { return ( <div> Hello, {this.props.name}! I am a FirstCompon...

This example creates a trigger that inserts a record to a second table (MyAudit) after a record is inserted into the table the trigger is defined on (MyTable). Here the "inserted" table is a special table used by Microsoft SQL Server to store affected rows during INSERT and UPDATE statemen...

Save the current state of working directory and the index (also known as the staging area) in a stack of stashes. git stash To include all untracked files in the stash use the --include-untracked or -u flags. git stash --include-untracked To include a message with your stash to make it more ...

If you need a completely customized view, you'll need to subclass View (the superclass of all Android views) and provide your custom sizing (onMeasure(...)) and drawing (onDraw(...)) methods: Create your custom view skeleton: this is basically the same for every custom view. Here we create the...

Swift let webview = UIWebView(frame: CGRect(x: 0, y: 0, width: 320, height: 480)) Objective-C UIWebView *webview = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)]; //Alternative way of defining frame for UIWebView UIWebView *webview = [[UIWebView alloc] init]; CGRect webviewFr...

This is how to create a basic method that logs 'Hello World" to the console: - (void)hello { NSLog(@"Hello World"); } The - at the beginning denotes this method as an instance method. The (void) denotes the return type. This method doesn't return anything, so you enter void. ...

You can create a CALayer and set its frame like this: Swift: let layer = CALayer() layer.frame = CGRect(x: 0, y: 0, width: 60, height: 80) Objective-C: CALayer *layer = [[CALayer alloc] init]; layer.frame = CGRectMake(0, 0, 60, 80); You can then add it as a sublayer to an existing CALayer...

You can easily transform every component in a clickable button using the MouseArea component. The code below displays a 360x360 window with a button and a text in the center; pressing the button will change the text: import QtQuick 2.0 Rectangle { width: 360 height: 360 Rectang...

This code selects data out of a table: SELECT Column1, Column2, Column3 FROM MySourceTable; This code creates a new table called MyNewTable and puts that data into it SELECT Column1, Column2, Column3 INTO MyNewTable FROM MySourceTable;

Slices are the typical way go programmers store lists of data. To declare a slice variable use the []Type syntax. var a []int To declare and initialize a slice variable in one line use the []Type{values} syntax. var a []int = []int{3, 1, 4, 1, 5, 9} Another way to initialize a slice is with...

angular.module("app") .service("counterService", function(){ var service = { number: 0 }; return service; });

Privileges The CREATE VIEW statement requires the CREATE VIEW privilege for the view, and some privilege for each column selected by the SELECT statement. For columns used elsewhere in the SELECT statement, you must have the SELECT privilege. If the OR REPLACE clause is present, you must also have ...

To show some content in a new window, a Stage needs to be created. After creation and initialisation show or showAndWait needs to be called on the Stage object: // create sample content Rectangle rect = new Rectangle(100, 100, 200, 300); Pane root = new Pane(rect); root.setPrefSize(500, 500); ...

Creating a Snackbar can be done as follows: Snackbar.make(view, "Text to display", Snackbar.LENGTH_LONG).show(); The view is used to find a suitable parent to use to display the Snackbar. Typically this would be a CoordinatorLayout that you've defined in your XML, which enables adding ...

You may want to create a duplicate of a table: CREATE TABLE ClonedEmployees AS SELECT * FROM Employees; You can use any of the other features of a SELECT statement to modify the data before passing it to the new table. The columns of the new table are automatically created according to the selec...