Tutorial by Examples: basic

Anonymous pipes, or simply pipes, are kernel-managed objects exposed to processes as a pair of file descriptors, one for the read terminus and one for the write terminus. They are created via the pipe(2) function: int pipefds[2]; int result; result = pipe(pipefds); On success, pipe() record...

The cluster library contains the ruspini data - a standard set of data for illustrating cluster analysis. library(cluster) ## to get the ruspini data plot(ruspini, asp=1, pch=20) ## take a look at the data hclust expects a distance matrix, not the original data. We ...

Live upcase server that returns error when input string is longer than 10 characters. Server: const express = require('express'), jsonParser = require('body-parser').json(), app = express(); // Add headers to work with elm-reactor app.use((req, res, next) => { res.setHeader...

###### Used for both Classification and Regression examples library(randomForest) library(car) ## For the Soils data data(Soils) ###################################################### ## RF Classification Example set.seed(656) ## for ...

JVM is an abstract computing machine or Virtual machine that resides in your RAM. It has a platform-independent execution environment that interprets Java bytecode into native machine code. (Javac is Java Compiler which compiles your Java code into Bytecode) Java program will be running inside the...

import React from 'react'; class Pane extends React.Component { constructor(props) { super(props); } render() { return React.createElement( 'section', this.props ); } }

The embed tag is new in HTML5. This element provides an integration point for an external (typically non-HTML) application or interactive content. <embed src="myflash.swf">

Some of the Class properties Ext.Data.Connection PropertiesDetailsurlAddress of the requesttimeoutWaiting time in millisecondssuccessReturn on successfailureReturn on failure Ext.Ajax.on("beforerequest", function(conn , options , eOpts) { console.log("beforerequest"); });...

A green rect with a round hole in the middle showing the image background underneth. <svg viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"> <mask id="myMask"> <rect x="0&quot...

library(dplyr) library(nycflights13) There are several verbs most commonly used in dplyr to modify datasets. select Select tailnum, type, model variables from the dataframe planes: select(planes, tailnum, type, model) ## # A tibble: 3,322 × 3 ## tailnum type mode...

public class BasicJavaBean implements java.io.Serializable{ private int value1; private String value2; private boolean value3; public BasicJavaBean(){} public void setValue1(int value1){ this.value1 = value1; } public int getValue1(){ ...

The sync() method reads and fetched the model data Backbone.sync = function(method, model) { document.write("The state of the model is:"); document.write("<br>"); //The 'method' specifies state of the model document.write(method +...

Expressions in Java are the primary construct for doing calculations. Here are some examples: 1 // A simple literal is an expression 1 + 2 // A simple expression that adds two numbers (i + j) / k // An expression with multiple operations (flag) ? c : d // An...

import React, { Component } from 'react'; import { Modal, Text, View, Button, StyleSheet, } from 'react-native'; const styles = StyleSheet.create({ mainContainer: { marginTop: 22, }, modalContainer: { marginTop: 22, }, }); class Example extends Component...

// plugin initialization $.fn.greenify = function() { // within the function you can use any of the jQuery methods // and `this` context refers to jQuery object this.css( "color", "green" ); }; // apply plugin $( "a" ).greenify();

Result<T, E> is an enum type which has two variants: Ok(T) indicating successful execution with meaningful result of type T, and Err(E) indicating occurrence of an unexpected error during execution, described by a value of type E. enum DateError { InvalidDay, InvalidMonth, } str...

Here is a very simple example of a function that "promises to proceed when a given time elapses". It does that by creating a new Deferred object, that is resolved later and returning the Deferred's promise: function waitPromise(milliseconds){ // Create a new Deferred object using th...

The Hello Audio! of Java that plays a sound file from local or internet storage looks as follows. It works for uncompressed .wav files and should not be used for playing mp3 or compressed files. import java.io.*; import java.net.URL; import javax.sound.sampled.*; public class SoundClipTest { ...

# from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer # python2 from http.server import BaseHTTPRequestHandler, HTTPServer # python3 class HandleRequests(BaseHTTPRequestHandler): def _set_headers(self): self.send_response(200) self.send_header('Content-type', 'text...

λ> :t 1 1 :: Num t => t λ> :t pi pi :: Floating a => a In the examples above, the type-checker infers a type-class rather than a concrete type for the two constants. In Haskell, the Num class is the most general numerical one (since it encompasses integers and reals), but pi must...