Tutorial by Examples: en

A common mistake MATLAB coders have, is using the length function for matrices (as opposed to vectors, for which it is intended). The length function, as mentioned in its documentation, "returns the length of the largest array dimension" of the input. For vectors, the return value of leng...

service I created post service with postRequest method. import {Injectable} from '@angular/core'; import {Http, Headers, Response} from "@angular/http"; import {PostModel} from "./PostModel"; import 'rxjs/add/operator/map'; import {Observable} from "rxjs"; ...

In the IF THEN ELSE statement the result can be either a single statement: DEFINE VARIABLE i AS INTEGER NO-UNDO. IF i = 0 THEN MESSAGE "Zero". ELSE MESSAGE "Something else". Or a block, for instance by adding a DO-block: DEFINE VARIABLE i AS INTEGER NO...

IF THEN ELSE can also be used like a function to return a single value. This is a lot like the ternary ?-operator of C. DEFINE VARIABLE i AS INTEGER NO-UNDO. DEFINE VARIABLE c AS CHARACTER NO-UNDO. /* Set c to "low" if i is less than 5 otherwise set it to "high" c...

Here's a basic example of how to do a very simple class system Class = {} local __instance = {__index=Class} -- Metatable for instances function Class.new() local instance = {} setmetatable(instance, __instance) return instance -- equivalent to: return setmetatable({}, __instance)...

@Component({ selector: 'main-component', template: '<example-component *ngFor="let hero of heroes" [hero]="hero"></example-component>' }) @Component({ selector: 'example-component', t...

Inside of your {CATALINA_HOME}/conf/ folder exists a server.xml and context.xml file. Each one of these contains similar code, but references different parts of Tomcat to complete the same task. server.xml is server-wide configuration. This is where you can set up HTTPS, HTTP2, JNDI Resources, etc....

public void test() { Connection conn = null; Statement stmt = null; try { Context ctx = (Context) new InitialContext().lookup("java:comp/env"); conn = ((DataSource) ctx.lookup("jdbc/SomeDataSource")).getConnection(); stmt = conn.createS...

Incorrect code Sub DoSomething() Dim foo As Collection With foo .Add "ABC" .Add "XYZ" End With End Sub Why doesn't this work? Object variables hold a reference, and references need to be set using the Set keyword. This error occurs whenever ...

you can set a Jekyll environment and value, when build time JEKYLL_ENV=production jekyll b JEKYLL_ENV=production jekyll build JEKYLL_ENV=production bundle exec jekyll build if your code contains the bellow snippet, analytics.html will not be included unless your building with JEKYLL_ENV=...

The known sub-classes for Entity Events are: Sub-ClassesSub-ClassesSub-ClassesCreatureSpawnEventCreeperPowerEventEntityChangeBlockEventEntityCombustEventEntityCreatePortalEventEntityDamageEventEntityDeathEventEntityExplodeEventEntityInteractEventEntityPortalEnterEventEntityRegainHealthEventEntitySh...

Let's create a small piece of code that throws an exception: private void button1_Click(object sender, EventArgs e) { string msg = null; msg.ToCharArray(); } If we execute this, we get the following Exception and stack trace: System.NullReferenceException: "Object reference not...

In general, the code is placed in the module of a sheet. This is the Worksheet_SelectionChange event, which fires each time a different cell is selected in the active sheet. You can select "Worksheet" from the first drop-down menu above the code window, and "Selection_Change" fr...

To restrict the characters that can be typed into an entry widget, only numbers for instance, a validate command can be added to the entry. A validate command is a function that return True if the change is accepted, False otherwise. This function will be called each time the content of the entry is...

In this example, one of two different ImageViews should be translated from the ChooserFragment to the DetailFragment. In the ChooserFragment layout we need the unique transitionName attributes: <ImageView android:id="@+id/image_first" android:layout_width="wrap_content...

GameScene code example: import SpriteKit protocol GameViewControllerDelegate: class { func callMethod(inputProperty:String) } class GameScene: SKScene { weak var gameViewControllerDelegate:GameViewControllerDelegate? override func didMove(to view: SKView) { gameViewContro...

Source Link Open the Terminal and write the following commands. 1-Update and upgrade package your system ubuntu: sudo su sudo apt-get -y update sudo apt-get -y upgrade sudo apt-get -y dist-upgrade sudo apt-get -y autoremove 2-Installing Dependenices: sudo apt-get install libopencv...

$ egrep '^(0|1)+ [a-zA-Z]+$' searchfile.txt 011 AaBBS

Reagent atoms are essentially the same as regular atoms in both Clojure and ClojureScript - they are essentially variables that can be altered. This is especially useful, as Clojure(Script)'s data types are mostly immutable - which means that to change the value of a variable, the variable has to be...

Instances of Integer_IO have a settings variable Default_Width which the number of characters that each output number will take. with Ada.Text_IO; use Ada.Text_IO; procedure Print_Integer is subtype Count is Integer range -1_000_000 .. 1_000_000; package Count_IO is new Integer_IO ...