Tutorial by Examples: basic

docker-compose.yml version: '2' services: php: image: phpmyadmin/phpmyadmin links: - mysql:db depends_on: - mysql mysql: image: k0st/alpine-mariadb volumes: - ./data/mysql:/var/lib/mysql environment: - MYSQL_DATABASE=mydb ...

COALESCE() returns the first NON NULL value in a list of arguments. Suppose we had a table containing phone numbers, and cell phone numbers and wanted to return only one for each user. In order to only obtain one, we can get the first NON NULL value. DECLARE @Table TABLE (UserID int, PhoneNumber va...

================== TODO: Link each of the drawing commands below to their individual examples. I don't know how to do this since the links to the individual examples point towards the "draft" folder. TODO: Add examples for these path "action" commands: stroke(), fill(), clip() ...

Let’s try some basic expression in the REPL: CL-USER> (+ 1 2 3) 6 CL-USER> (- 3 1 1) 1 CL-USER> (- 3) -3 CL-USER> (+ 5.3 (- 3 2) (* 2 2)) 10.3 CL-USER> (concatenate 'string "Hello, " "World!") "Hello, World!" CL-USER> The basic building ...

<svg width="900px" height="400px" viewBox="0 0 900 400"> <defs> <filter id="basicGaussian"> <feGaussianBlur stdDeviation="5"/> </filter> </defs> <image xlink:href=&q...

>> img = imread('football.jpg'); Use imread to read image files into a matrix in MATLAB. Once you imread an image, it is stored as an ND-array in memory: >> size(img) ans = 256 320 3 The image 'football.jpg' has 256 rows and 320 columns and it has 3 color channels: Red, ...

HTTP Basic Authentication provides a straightforward mechanism for authentication. Credentials are sent in plain text, and so is insecure by default. Successful authentication proceeds as follows. The client requests a page for which access is restricted: GET /secret The server responds with st...

A Subject in RxJava is a class that is both an Observable and an Observer. This basically means that it can act as an Observable and pass inputs to subscribers and as an Observer to get inputs from another Observable. Subject<String, String> subject = PublishSubject.create(); subject.subscr...

Create a file named SCALA_PROJECT/build.gradle with these contents: group 'scala_gradle' version '1.0-SNAPSHOT' apply plugin: 'scala' repositories { jcenter() mavenCentral() maven { url "https://repo.typesafe.com/typesafe/maven-releases" } } dep...

import cv2 image_path= #put your image path here #use imread() function to read image data to variable img. img = cv2.imread(image_path) #display image data in a new window with title 'I am an image display window' cv2.imshow('I am an image display window',img) #wait until user hi...

DateTime now = new DateTime.now(); DateTime berlinWallFell = new DateTime(1989, 11, 9); DateTime moonLanding = DateTime.parse("1969-07-20 20:18:00"); // 8:18pm You can find more in depth information here.

// Include the MFC header: // (you do not need to and should not include the standard Windows headers, e.g. // Windows.h) #include <AfxWin.h> // MFC core and standard components // The following header defines resource constants, such as dialog and control IDs: #include &qu...

The first step to logging is simply to run Meteor from the shell, and you'll get the server logs in the command console. meteor The next step is to pipe the contents of std_out and std_err to a logfile, like so: meteor > my_app_log.log 2> my_app_err.log

Using built-in colormaps is as simple as passing the name of the required colormap (as given in the colormaps reference) to the plotting function (such as pcolormesh or contourf) that expects it, usually in the form of a cmap keyword argument: import matplotlib.pyplot as plt import numpy as np ...

BroadcastReceivers are used to receive broadcast Intents that are sent by the Android OS, other apps, or within the same app. Each Intent is created with an Intent Filter, which requires a String action. Additional information can be configured in the Intent. Likewise, BroadcastReceivers register ...

Introduction and motivation Expression templates (denoted as ETs in the following) are a powerful template meta-programming technique, used to speed-up calculations of sometimes quite expensive expressions. It is widely used in different domains, for example in implementation of linear algebra ...

integer: 25 string: "25" float: 25.0 boolean: true null type: null

This is an example of using Android Support Library V7 RecyclerView. Support libraries are generally recommended because they provide backward-compatible versions of new features, provide useful UI elements that are not included in the framework, and provide a range of utilities that apps can draw o...

apologies: since I don't know of a channel for discussing/providing feedback on requests for improvement, I'm going to put my question here. Please feel free to point out a better place for this! @DataTx states that this is "completely unclear, incomplete, or has severe formatting problems&quot...

A texture is a form of data storage that allows convenient access not just to particular data entries, but also to sample points mixing (interpolating) multiple entries together. In OpenGL textures can be used for many things, but most commonly it's mapping an image to a polygon (for example a tria...