Tutorial by Examples: sim

let inline getLength s = (^a: (member Length: _) s) //usage: getLength "Hello World" // or "Hello World" |> getLength // returns 11

use std::ops::Drop; struct Foo(usize); impl Drop for Foo { fn drop(&mut self) { println!("I had a {}", self.0); } }

In a simple case statement, one value or variable is checked against multiple possible answers. The code below is an example of a simple case statement: SELECT CASE DATEPART(WEEKDAY, GETDATE()) WHEN 1 THEN 'Sunday' WHEN 2 THEN 'Monday' WHEN 3 THEN 'Tuesday' WHEN 4 THEN 'Wednes...

// Create the request. NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://google.com"]]; // Specify that it will be a POST request request.HTTPMethod = @"POST"; // This is how we set header fields [request setValue:@&...

// Create the request. NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://google.com"]]; // Specify that it will be a POST request request.HTTPMethod = @"POST"; // Setting a timeout request.timeoutInterval = 20.0; //...

Here is a simple Sprite-Kit GameScene.swift. Create a new, empty SpriteKit project and replace the GameScene.swift with this. Then build and run. Click on any of the objects on screen to give make them move. Check the logs and the comments to see which ones collide and which ones make contact. // ...

HanlderManager providing: public class HandlerManagerProvider { private static HandlerManager handlerManager; private HandlerManagerProvider() { } public static HandlerManager get() { return handlerManager != null ? handlerManager : (handlerManager =...

If you find these steps unfamiliar, consider starting here instead. Note these steps come from Stack Overflow Documentation. django-admin startproject myproject cd myproject python manage.py startapp myapp myproject/settings.py Install the app INSTALLED_APPS = [ 'django.contrib.admin', ...

import matplotlib.pyplot as plt import numpy as np # generate 1000 data points with normal distribution data = np.random.randn(1000) plt.hist(data) plt.show()

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Assuming you have a model that looks like the following, we will get up an running with a simple barebones read-only API driven by Django REST Framework ("DRF"). models.py class FeedItem(models.Model): title = models.CharField(max_length=100, blank=True) url = models.URLField(b...

with Ada.Text_IO; use Ada.Text_IO; procedure Main is task My_Task; task body My_Task is begin Put_Line ("Hello from My_Task"); end; begin Put_Line ("Hello from Main"); end; Result The order of Put_Line can vary. Hello from My_Task Hello from ...

with Ada.Text_IO; use Ada.Text_IO; procedure Main is task My_Task; task body My_Task is begin for I in 1 .. 4 loop Put_Line ("Hello from My_Task"); end loop; end; begin Put_Line ("Hello from Main"); end; Result The order of Put...

with Ada.Text_IO; use Ada.Text_IO; procedure Main is task My_Task; task body My_Task is begin for I in 1 .. 4 loop Put_Line ("Hello from My_Task"); end loop; end; begin for I in 1 .. 4 loop Put_Line ("Hello from Main"); e...

with Ada.Text_IO; use Ada.Text_IO; procedure Main is task My_Task_1; task My_Task_2; task body My_Task_1 is begin for I in 1 .. 4 loop Put_Line ("Hello from My_Task_1"); end loop; end; task body My_Task_2 is begin for ...

Passing ByRef or ByVal indicates whether the actual value of an argument is passed to the CalledProcedure by the CallingProcedure, or whether a reference (called a pointer in some other languages) is passed to the CalledProcedure. If an argument is passed ByRef, the memory address of the argument i...

You can parse XML from a string or from a XML file 1. From a string $xml_obj = simplexml_load_string($string); 2. From a file $xml_obj = simplexml_load_file('books.xml'); Example of parsing Considering the following XML: <?xml version="1.0" encoding="UTF-8"?> &l...

# Define which servers to include in the load balancing scheme. # It's best to use the servers' private IPs for better performance and security. upstream backend { ip_hash; server 10.10.10.10 slow_start=30s max_fails=3 fail_timeout=15s; server 10.10.10.12 slow_start=30s max_fa...

We want to be able to compile below component and render it in our webpage Filename: src/index.jsx import React from 'react'; import ReactDOM from 'react-dom'; class ToDo extends React.Component { render() { return (<div>I am working</div>); } } ReactDOM.re...

This source code create a simple key/value store service based on map Erlang datastructure. Firstly, we need to define all information concerning our gen_server: -module(cache). -behaviour(gen_server). % our API -export([start_link/0]). -export([get/1, put/2, state/0, delete/1, stop/0]). %...