Tutorial by Examples: basic

Notepad++ provides 2 types of features for auto-completion and suggestions: Auto-completion that reads the open file and provide suggestion of words and/or functions within the file Suggestion with the arguments of functions (specific to the language) To enable it, you need to change a settin...

trigger AccountTrigger on Account (before insert) { System.debug('Account(s) are about to be inserted'); }

An array is a data structure that stores values of same data type. In Python, this is the main difference between arrays and lists. While python lists can contain values corresponding to different data types, arrays in python can only contain values corresponding to same data type. In this tutorial...

Get a list of all jobs in the current session: Get-Job Waiting on a job to finish before getting the result: $job | Wait-job | Receive-Job Timeout a job if it runs too long (10 seconds in this example) $job | Wait-job -Timeout 10 Stopping a job (completes all tasks that are pending in t...

FRP, or Functional Reactive Programming, has some basic terms which you need to know. Every piece of data can be represented as Observable, which is an asynchronous data stream. The power of FRP is in representation synchronous and asynchronous events as streams, Observables, and providing the same...

Tensorflow works on principle of dataflow graphs. To perform some computation there are two steps: Represent the computation as a graph. Execute the graph. Representation: Like any directed graph a Tensorflow graph consists of nodes and directional edges. Node: A Node is also called an Op(s...

#include <SPI.h> #define CSPIN 1 void setup() { pinMode(CSPIN, OUTPUT); // init chip select pin as an output digitalWrite(CSPIN, 1); // most slaves interpret a high level on CS as "deasserted" SPI.begin(); SPI.beginTransaction(SPISettings(1000000, MSBFIRST, SPI_MO...

This test class will test the IsBlank(...) method of SomeClass. Below is the example SomeClass. This class has only the one, basic static method, but you will be unable to deploy it to a production instance for use until you have reached the code coverage threshold. public class SomeClass { ...

This program draws some shapes and 'hello world!' and let an image go to every corner of the window. the complete code: import pygame,sys from pygame.locals import * pygame.init() FPS = 30 #frames per second setting fpsClock = pygame.time.Clock() #set up the window screen = pygame.disp...

Once you understand how to create an HTTP Server with node, it's important to understand how to make it "do" things based on the path that a user has navigated to. This phenomenon is called, "routing". The most basic example of this would be to check if (request.url === 'some/pa...

C++11 Note: in all the following, the existence of the C++11 constant nullptr is assumed. For earlier versions, replace nullptr with NULL, the constant that used to play a similar role. Creating a pointer variable A pointer variable can be created using the specific * syntax, e.g. int *pointer_...

A tuple is simply a concatenation of multiple values: of possibly different types whose number and types is known statically For example, (1, "Hello") is a 2 elements tuple composed of a i32 and a &str, and its type is denoted as (i32, &'static str) in a similar fashion as i...

Task Rebuild -Depends Clean, Build { "Rebuild" } Task Build { "Build" } Task Clean { "Clean" } Task default -Depends Build

QThread is a handle to a platform thread. It lets you manage the thread by monitoring its lifetime, and requesting that it finishes its work. In most cases inhering from the class is not recommended. The default run method starts an event loop that can dispatch events to objects living in the class...

@supports (display: flex) { /* Flexbox is available, so use it */ .my-container { display: flex; } } In terms of syntax, @supports is very similar to @media, but instead of detecting screen size and orientation, @supports will detect whether the browser can handle a given CSS rule....

The following example creates a FileSystemWatcher to watch the directory specified at run time. The component is set to watch for changes in LastWrite and LastAccess time, the creation, deletion, or renaming of text files in the directory. If a file is changed, created, or deleted, the path to the f...

Add the I18N nuget package to your MVC project. In web.config, add the i18n.LocalizingModule to your <httpModules> or <modules> section. <!-- IIS 6 --> <httpModules> <add name="i18n.LocalizingModule" type="i18n.LocalizingModule, i18n" /> &...

Polymorphism is the ability to perform an action on an object regardless of its type. This is generally implemented by creating a base class and having two or more subclasses that all implement methods with the same signature. Any other function or method that manipulates these objects can call the ...

enum Fruit { apple, banana } main() { var a = Fruit.apple; switch (a) { case Fruit.apple: print('it is an apple'); break; } // get all the values of the enums for (List<Fruit> value in Fruit.values) { print(value); } // get the second val...

Groovy's safe navigation operator allows to avoid NullPointerExceptions when accessing to methods or attributes on variables that may assume null values. It is equivalent to nullable_var == null ? null : nullable_var.myMethod() def lst = ['foo', 'bar', 'baz'] def f_value = lst.find { it.startsWi...