Tutorial by Examples: u

For security reasons, PowerShell is set up by default to only allow signed scripts to execute. Executing the following command will allow you to run unsigned scripts (you must run PowerShell as Administrator to do this). Set-ExecutionPolicy RemoteSigned Another way to run PowerShell scripts is t...

Configure your project-level build.gradle to include the android-apt plugin: buildscript { repositories { mavenCentral() } dependencies { classpath 'com.jakewharton:butterknife-gradle-plugin:8.5.1' } } Then, apply the android-apt plugin in your module-level build...

split allows to divide a vector or a data.frame into buckets with regards to a factor/group variables. This ventilation into buckets takes the form of a list, that can then be used to apply group-wise computation (for loops or lapply/sapply). First example shows the usage of split on a vector: Con...

The table-layout property changes the algorithm that is used for the layout of a table. Below an example of two tables both set to width: 150px: The table on the left has table-layout: auto while the one on the right has table-layout: fixed. The former is wider than the specified width (210px in...

3.0 In Swift 3 there are multiple access-levels. This example uses them all except for open: public struct Car { public let make: String let model: String //Optional keyword: will automatically be "internal" private let fullName: String fileprivate var otherName...

public class SuperClass { private func secretMethod() {} } internal class SubClass: SuperClass { override internal func secretMethod() { super.secretMethod() } }

class Animal def method_missing(method, *args, &block) "Cannot call #{method} on Animal" end end => Animal.new.say_moo > "Cannot call say_moo on Animal"

class Animal def method_missing(method, *args, &block) say, speak = method.to_s.split("_") if say == "say" speak else super end end end => a = Animal.new => a.say_moo => "moo" => a.shout_moo => NoMethodE...

class Animal def method_missing(method, *args, &block) if method.to_s == 'say' block.call else super end end end => Animal.new.say{ 'moo' } => "moo"

class Animal def method_missing(method, *args, &block) say, speak = method.to_s.split("_") if say == "say" && speak return speak.upcase if args.first == "shout" speak else super end end end => Animal.new....

FrameLayout is designed to block out an area on the screen to display a single item. You can, however, add multiple children to a FrameLayout and control their position within the FrameLayout by assigning gravity to each child, using the android:layout_gravity attribute. Generally, FrameLayout is ...

Installation Installing Codename One In NetBeans These instructions assume you have downloaded a recent version of NetBeans (at this time 8.x), installed and launched it. Select the Tools->Plugins menu option Select the Available Plugins Tab Check The CodenameOne Plugin ...

Inheritance allows classes to define specific behaviour based on an existing class. class Animal def say_hello 'Meep!' end def eat 'Yumm!' end end class Dog < Animal def say_hello 'Woof!' end end spot = Dog.new spot.say_hello # 'Woof!' spot.eat ...

Detailed instructions on getting Verilog set up or installed is dependent on the tool you use since there are many Verilog tools.

What is AJAX? AJAX stands for Asynchronous JavaScript and XML. In a nutshell, it is the use of the XMLHttpRequest object to communicate with server-side scripts. It can send as well as receive information in a variety of formats, including JSON, XML, HTML, and even text files. -Mozilla Devel...

Debug cargo build Release Building with the --release flag enables certain compiler optimizations that aren't done when building a debug build. This makes the code run faster, but makes the compile time a bit longer too. For optimal performance, this command should be used once a release build ...

Android supports several configuration qualifiers that allow you to control how the system selects your alternative resources based on the characteristics of the current device screen. A configuration qualifier is a string that you can append to a resource directory in your Android project and speci...

To run a specific migration up or down, use db:migrate:up or db:migrate:down. Up a specific migration: 5.0 rake db:migrate:up VERSION=20090408054555 5.0 rails db:migrate:up VERSION=20090408054555 Down a specific migration: 5.0 rake db:migrate:down VERSION=20090408054555 5.0 ra...

To run migrations in the test environment, run this shell command: rake db:migrate RAILS_ENV=test 5.0 Starting in Rails 5.0, you can use rails instead of rake: rails db:migrate RAILS_ENV=test

To add a new column name to the users table, run the command: rails generate migration AddNameToUsers name This generates the following migration: class AddNameToUsers < ActiveRecord::Migration[5.0] def change add_column :users, :name, :string end end When the migration name i...