Tutorial by Examples: d

echo "Hello, world!" Even in bash, this program works similarly in most other languages. The program has no input and will always function the same in an idealized world - run time should never change. Thus Hello World has constant complexity. Almost all elementary operations are assum...

image: jangrewe/gitlab-ci-android before_script: - apt-get --quiet update --yes - apt-get --quiet install --yes wget tar unzip lib32stdc++6 lib32z1 openjdk-8-jdk - echo y | ${ANDROID_HOME}/tools/android --silent update sdk --no-ui --all --filter android-24 - echo y | ${ANDROID_HOME}/too...

// Set up Express var express = require('express'); var app = express(); // Serve static assets from both 'public' and 'files' directory app.use(express.static('public'); app.use(express.static('files'); // Start Express server app.listen(3030);

// Set up Express var express = require('express'); var app = express(); // Serve files from the absolute path of the directory app.use(express.static(__dirname + '/public')); // Start Express server app.listen(3030);

// Set up Express var express = require('express'); var app = express(); /* Serve from the absolute path of the directory that you want to serve with a */ virtual path prefix app.use('/static', express.static(__dirname + '/public')); // Start Express server app.listen(3030);

Joins in Spark: Read textFile 1 val txt1=sc.textFile(path="/path/to/input/file1") Eg: A B 1 2 3 4 Read textFile 2 val txt2=sc.textFile(path="/path/to/input/file2") Eg: A C 1 5 3 6 Join and print the result. txt1.join(txt2).foreach(p...

Two of the most fundamental higher-order functions included in the standard library are map and filter. These functions are generic and can operate on any iterable. In particular, they are well-suited for computations on arrays. Suppose we have a dataset of schools. Each school teaches a particular...

You can use the IFA for measuring ad clicks and the IFV for measuring app installs. IFA has built-in privacy mechanisms that make it perfect for advertising. In contrast, the IFV is for developers to use internally to measure users who install their apps. IFA ASIdentifierManager class pr...

A lot of example code posted on StackOverflow includes snippets like this: if ("A".equals(someString)) { // do something } This does "prevent" or "avoid" a possible NullPointerException in the case that someString is null. Furthermore, it is arguable that ...

This example shows how to deploy the "Hello World" program as a library and how to link it with other targets. Say we have the same set of source/header files as in the http://www.riptutorial.com/cmake/example/22391/-hello-world--with-multiple-source-files example. Instead of building fro...

A bit-field is used to club together many variables into one object, similar to a structure. This allows for reduced memory usage and is especially useful in an embedded environment. e.g. consider the following variables having the ranges as given below. a --> range 0 - 3 b --> range 0 -...

Design documents contain application logic. Any document in a database that has an _id starting with "_design/" can be used as design document. Usually there is one design document for each application. { "_id": "_design/example", "view": { ...

All programming languages allow us to assign values to variables. Usually, a value is assigned to variable, standing on left side. The prototype of the overall assignment operations in any contemporary programming language looks like this: left_operand assignment_operand right_operand instructions_...

// PixelAccessTutorial.cpp : Defines the entry point for the console // Environment: Visual studio 2015, Windows 10 // Assumptions: Opecv is installed configured in the visual studio project // Opencv version: OpenCV 3.1 #include "stdafx.h" #include<opencv2/core/core.hpp> #i...

This class open a .gz file (usual format of compressed log files) and will return a line at each call of .NextLine() There is no memory usage for temporary decompression, very useful for large file. Imports System.IO Class logread_gz Private ptr As FileStream Private UnGZPtr As Compress...

Here is the JSON Structure we are going to use. { "employees": [ { "firstName": "John", "lastName": "Doe", "skills": [ { "name": "javascript", "rating&quo...

Taggy-lens allows us to use lenses to parse and inspect HTML documents. #!/usr/bin/env stack -- stack --resolver lts-7.0 --install-ghc runghc --package text --package lens --package taggy-lens {-# LANGUAGE OverloadedStrings #-} import qualified Data.Text.Lazy as TL import qualified Data.Tex...

Overview Android Studio's built-in update mechanism can be set to receive updates through any one of these four channels: Canary: Bleeding edge, released about weekly. These are early previews released in order to obtain real-world feedback during development. The canary channel will always have...

Though Go supports ++ and -- operators and the behaviour is found to be almost similar to c/c++, variables with such operators cannot be passed as argument to function. package main import ( "fmt" ) func abcd(a int, b int) { fmt.Println(a," &...

You can attach an image in a texture to a framebuffer, so that you can render directly to that texture. glGenFramebuffers (1, &framebuffer); glBindFramebuffer (GL_FRAMEBUFFER, framebuffer); glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, ...