Tutorial by Examples: co

Docker Compose hello world

A very basic docker-compose.yml looks like this: version: '2' services: hello_world: image: ubuntu command: [/bin/echo, 'Hello world'] This file is making it so that there's a hello_world service, that's initialized from the ubuntu:latest image and that, when it's run, it just runs...

docker-compose • Getting started with docker-compose

Installing on macOS

Go to https://www.arduino.cc/en/Main/Software Click the Mac OS X link. Unzip the .zipfile. Move the Arduino application to Applications.

arduino • Arduino IDE

Loading jQuery via console on a page that does not have it.

Sometimes one has to work with pages that are not using jQuery while most developers are used to have jQuery handy. In such situations one can use Chrome Developer Tools console (F12) to manually add jQuery on a loaded page by running following: var j = document.createElement('script'); j.onload ...

jQuery • Getting started with jQuery

Comments

The first interesting thing to know is how to write comments. In VB .NET, you write a comment by writing an apostrophe ' or writing REM. This means the rest of the line will not be taken into account by the compiler. 'This entire line is a comment Dim x As Integer = 0 'This comment is here to say...

Visual Basic .NET Language • Introduction to Syntax

Learning about a command

To get more information about any git command – i.e. details about what the command does, available options and other documentation – use the --help option or the help command. For example, to get all available information about the git diff command, use: git diff --help git help diff Similarl...

Git • Getting started with Git

Simply copy the www folder to your web server

Ionic 1.2 officially supports deployment as a website If you're not using any Cordova plugins then there is no problem (if you really wish to) to upload the contents of the www folder to your server, and woila - you'll have the same app. However, it is important to note that Ionic 1 never intended...

ionic-framework • Deploy Ionic as a website

General Commands

To break loops, the command EXIT can be used. DO. READ TABLE itab INDEX sy-index INTO DATA(wa). IF sy-subrc <> 0. EXIT. "Stop this loop if no element was found ENDIF. " some code ENDDO. To skip to the next loop step, the command CONTINUE can be u...

ABAP • Loops

Install specific precompiled ruby version and ruby gems (Ubuntu)

sudo apt-add-repository ppa:brightbox/ruby-ng Hit Enter to confirm sudo apt-get update Then you can install your ruby version of choice (the ppa supports ruby2.0 ruby2.1 ruby2.2 ruby2.3 and legacy versions ruby1.8 ruby1.9.1) Don't forget to include the respective -dev package for your version. Ot...

rubygems • Getting started with rubygems

Cross-thread communication with Session Types

Session Types are a way to tell the compiler about the protocol you want to use to communicate between threads - not protocol as in HTTP or FTP, but the pattern of information flow between threads. This is useful since the compiler will now stop you from accidentally breaking your protocol and causi...

Rust • Parallelism

Construct and execute

(This is a request for a good example that shows how to construct a SELECT using CONCAT, then prepare+execute it. Please emphasize the use of @variables versus DECLAREd variables -- it makes a big difference, and it is something that novices (include myself) stumble over.)

MySQL • PREPARE Statements

Configuring RabbitMQ on *nix Systems

Configuring your environment RabbitMQ looks for an set of environment variables in /etc/rabbitmq/rabbitmq-env.conf. If it does not exist, it assumes default values. All values in rabbitmq-env.conf get exported to the environment the RabbitMQ server runs in with a RABBITMQ_ prefix; this prefix is no...

rabbitmq • Configuring RabbitMQ

Leap Seconds

Oracle does not handle leap seconds. See My Oracle Support note 2019397.2 and 730795.1 for more details.

Oracle Database • Dates

Command line arguments

Command line arguments parsing is Go is very similar to other languages. In you code you just access slice of arguments where first argument will be the name of program itself. Quick example: package main import ( "fmt" "os" ) func main() { progName := o...

Go • Parsing Command Line Arguments And Flags

Difference between jQuery(fn) and executing your code before

Using the document-ready event can have small performance drawbacks, with delayed execution of up to ~300ms. Sometimes the same behavior can be achieved by execution of code just before the closing </body> tag: <body> <span id="greeting"></span> world! <sc...

jQuery • document-ready event

One line showing commiter name and time since commit

tree = log --oneline --decorate --source --pretty=format:'"%Cblue %h %Cgreen %ar %Cblue %an %C(yellow) %d %Creset %s"' --all --graph example * 40554ac 3 months ago Alexander Zolotov Merge pull request #95 from gmandnepr/external_plugins |\ | * e509f61 3 months ago Ievg...

Git • Browsing the history

Copy a single file

Copy foo.txt from /path/to/source/ to /path/to/target/folder/ cp /path/to/source/foo.txt /path/to/target/folder/ Copy foo.txt from /path/to/source/ to /path/to/target/folder/ into a file called bar.txt cp /path/to/source/foo.txt /path/to/target/folder/bar.txt

Bash • Copying (cp)

Copy folders

copy folder foo into folder bar cp -r /path/to/foo /path/to/bar if folder bar exists before issuing the command, then foo and its content will be copied into the folder bar. However, if bar does not exist before issuing the command, then the folder bar will be created and the content of foo wil...

Bash • Copying (cp)

Connect and Express

Express is based on Connect, which is what provides the middleware functionality of Express. To understand what connect is, you can see that it provides the basic app structure that you use when you use express const connect = require('connect') const app = connect() app.listen(3000) This wi...

express • Connect

Using macro() to extend collections

The macro() function allows you to add new functionality to Illuminate\Support\Collection objects Usage: Collection::macro("macro_name", function ($parameters) { // Your macro }); For example: Collection::macro('uppercase', function () { return $this->map(function ($i...

Laravel • Collections

Compile your app

There are several ways to compile your app. You can use the simulator/emulator, deploy it to your device or create store apk's/ipa's. There is also a live test tool (TiShadow) which saves you a lot of time waiting for the compiler. cli way # android to device ti build -p android -T device # a...

appcelerator • Getting started with appcelerator