Tutorial by Examples: reat

Here is a basic example form with one required text field and one submit button, which submits to a custom function: class Page_Controller extends ContentController { private static $allowed_actions = array( 'ExampleForm' ); public function ExampleForm() { $fiel...

os.mkdir('newdir') If you need to specify permissions, you can use the optional mode argument: os.mkdir('newdir', mode=0700)

Create a DATABASE. Note that the shortened word SCHEMA can be used as a synonym. CREATE DATABASE Baseball; -- creates a database named Baseball If the database already exists, Error 1007 is returned. To get around this error, try: CREATE DATABASE IF NOT EXISTS Baseball; Similarly, DROP DATA...

The normal way to create an array of numbers: numbers = [1, 2, 3, 4, 5] Range objects can be used extensively to create an array of numbers: numbers = Array(1..10) # => [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] numbers = (1..10).to_a # => [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] #step and #map methods...

As of Qt 5.1 and later you can use QQmlApplicationEngine instead of QQuickView to load and render a QML script. With QQmlApplicationEngine you do need to use a QML Window type as your root element. You can obtain the root context from the engine where you can then add global properties to the cont...

Creating a ServiceHost programmatically (without config file) in its most basic form: namespace ConsoleHost { class ConsoleHost { ServiceHost mHost; public Console() { mHost = new ServiceHost(typeof(Example), new Uri("net.tcp://localhost:9000/Example")); ...

Given a local directory with the following contents: └── dir1 ├── subdir1 └── subdir2 We want to create the same subdir1, subdir2 under a new directory dir2, which does not exist yet. import os os.makedirs("./dir2/subdir1") os.makedirs("./dir2/subdir2") R...

First create a resource pool besides the default one CREATE RESOURCE POOL [PoolAdhoc] WITH(min_cpu_percent=0, max_cpu_percent=50, min_memory_percent=0, max_memory_percent=50) GO Create the worload group for the pool CREATE WORKLOAD GROUP [AdhocMedium] WITH(importa...

Dim openListType = GetType(List(Of )) Dim typeParameters = {GetType(String)} Dim stringListType = openListType.MakeGenericType(typeParameters) Dim instance = DirectCast(Activator.CreateInstance(stringListType), List(Of String)) instance.Add("Hello")

Example A var i,a,b,len; a = {x:0,y:0} function test(){ // return object created each call return {x:0,y:0}; } function test1(a){ // return object supplied a.x=0; a.y=0; return a; } for(i = 0; i < 100; i ++){ // Loop A b = test(); } for(i = 0; i < 100; ...

--- person_table: - &person001 fname: homer lname: simpson role: dad age: 33 - &person002 fname: marge lname: simpson role: mom age: 34 - &person003 fname: pe...

Create a new repository or clone an existing one. Create a new branch called gh-pages without any history $ git checkout --orphan gh-pages # ensure you are in the correct directory then, # remove all files from the old working tree $ git rm -rf Add an index.html file to the root of t...

Once you first add the Facebook login/signup, the button looks something like: Most of the times, it doesn't match with the design-specs of your app. And here's how you can customize it: <FrameLayout android:layout_below="@+id/no_network_bar" android:id="@+id/FrameLay...

NSMutableArray can be initialized as an empty array like this: NSMutableArray *array = [[NSMutableArray alloc] init]; // or NSMutableArray *array2 = @[].mutableCopy; // or NSMutableArray *array3 = [NSMutableArray array]; NSMutableArray can be initialized with another array like this: NSMuta...

Creates a new menu in the Spreadsheet UI. Each menu entry runs a user-defined function. var activeSheet = SpreadsheetApp.getActiveSpreadsheet(); var menuItems = []; // When the user clicks on "addMenuExample" then "Menu 1", the function Myfunction1 is executed. me...

F# uses the type keyword to create different kind of types. Type aliases Discriminated union types Record types Interface types Class types Struct types Examples with equivalent C# code where possible: // Equivalent C#: // using IntAliasType = System.Int32; type IntAliasType = int // ...

File static class By using Create method of the File static class we can create files. Method creates the file at the given path, at the same time it opens the file and gives us the FileStream of the file. Make sure you close the file after you are done with it. ex1: var fileStream1 = File.Create...

To build a Rails application that will be an API server, you can start with a more limited subset of Rails in Rails 5. To generate a new Rails API app: rails new my_api --api What --api does is to remove functionality that is not needed when building an API. This includes sessions, cookies, ass...

Mysql has its EVENT functionality for avoiding complicated cron interactions when much of what you are scheduling is SQL related, and less file related. See the Manual page here. Think of Events as Stored Procedures that are scheduled to run on recurring intervals. To save time in debugging Event-r...

An array column is supported by PostgreSQL. Rails will automatically convert a PostgreSQL array to a Ruby array, and vice-versa. Create a table with an array column: create_table :products do |t| t.string :name t.text :colors, array: true, default: [] end Add an array column to an existi...