Tutorial by Examples: co

ODEs in compiled languages - definition in R

library(deSolve) ## ----------------------------------------------------------------------------- ## Define parameters and variables ## ----------------------------------------------------------------------------- eps <- 0.01; M <- 10 k <- M * eps^2/2 L <- 1 L0 <- 0.5 ...

ODEs in compiled languages - definition in C

sink("caraxis_C.c") cat(" /* suitable names for parameters and state variables */ #include <R.h> #include <math.h> static double parms[8]; #define eps parms[0] #define m parms[1] #define k parms[2] #define L parms[3] #define L0 parms[4] #define r p...

ODEs in compiled languages - definition in fortran

sink("caraxis_fortran.f") cat(" c---------------------------------------------------------------- c Initialiser for parameter common block c---------------------------------------------------------------- subroutine init_fortran(daeparms) external daeparms ...

ODEs in compiled languages - a benchmark test

When you compiled and loaded the code in the three examples before (ODEs in compiled languages - definition in R, ODEs in compiled languages - definition in C and ODEs in compiled languages - definition in fortran) you are able to run a benchmark test. library(microbenchmark) R <- function(){...

REWRITE of records in a RELATIVE access file

GCobol >>SOURCE FORMAT IS FIXED *> *************************************************************** *> Purpose: RELATIVE file organization REWRITE example *> Tectonics: cobc -g -debug -W -x relatives.cob *> *********************************************...

UNLOCK record from a file connector

UNLOCK filename-1 RECORDS

Rendering components

There are two options to render components on server: renderToString and renderToStaticMarkup. renderToString This will render React components to HTML on server. This function will also add data-react- properties to HTML elements so React on client won't have to render elements again. import { r...

Simple React Component

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...

Configure webpack

Create a file webpack.config.js in the root of your working directory Filename: webpack.config.js module.exports = { entry: __dirname + "/src/index.jsx", devtool: "source-map", output: { path: __dirname + "/build", filename: "bund...

Configure babel

Create a file .babelrc in the root of our working directory Filename: .babelrc { "presets": ["es2015","react"] }

HTML file to use react component

Setup a simple html file in the root of the project directory Filename: index.html <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title></title> </head> <body> <div id="App"></div> ...

Transpile and bundle your component

Using webpack, you can bundle your component: $ webpack This will create our output file in build directory. Open the HTML page in a browser to see component in action

The Complete Custom Google Map Polymer With In Built Cache

<link rel=import href="../bower_components/google-map/google-map.html"> <link rel=import href="../bower_components/google-map/google-map-marker.html"> <link rel=import href="../bower_components/google-map/google-map-search.html"> <link rel=import...

Largest and smallest items in a collection

To find the largest items in a collection, heapq module has a function called nlargest, we pass it two arguments, the first one is the number of items that we want to retrieve, the second one is the collection name: import heapq numbers = [1, 4, 2, 100, 20, 50, 32, 200, 150, 8] print(heapq.nl...

Smallest item in a collection

The most interesting property of a heap is that its smallest element is always the first element: heap[0] import heapq numbers = [10, 4, 2, 100, 20, 50, 32, 200, 150, 8] heapq.heapify(numbers) print(numbers) # Output: [2, 4, 10, 100, 8, 50, 32, 200, 150, 20] heapq.heappop(numbers) # 2...

Options in for comprehensions

Options have a flatMap method. This means they can be used in a for comprehension. In this way we can lift regular functions to work on Options without having to redefine them. val firstOption: Option[Int] = Option(1) val secondOption: Option[Int] = Option(2) val myResult = for { firstValue ...

Service Account Authentcation Vb.net

Sample uses Install-Package Google.Apis.AnalyticsReporting.v4 Public Shared Function getServiceInitializer() As BaseClientService Dim serviceAccountCredentialFilePath = "Path to Json service account key file" REM from Google Developers console Dim myKeyEMail ...

application configuration

@Configuration @EnableAsync public class ApplicationConfiguration{ @Bean public TaskExecutor getAsyncExecutor() { ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor(); executor.setCorePoolSize(2); executor.setThreadNamePrefix("executor-task...

Asynchronous Controller

public async Task<actionresult> Index() { return View("View", await db.UserMasers.ToListAsync()); }

preserveConstEnums

Typescript supports costant enumerables, declared through const enum. This is usually just syntax sugar as the costant enums are inlined in compiled JavaScript. For instance the following code const enum Tristate { True, False, Unknown } var something = Tristate.True; compil...

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