Tutorial by Examples: r

Command Handling over Serial

byte incoming; String inBuffer; void setup() { Serial.begin(9600); // or whatever baud rate you would like } void loop(){ // setup as non-blocking code if(Serial.available() > 0) { incoming = Serial.read(); if(incoming == '\n') { // newline, car...

arduino • Serial Communication

Start with the Sublime Tutor

This tutorial is inspired from classic vimtutor. You will get to learn some handy shortcuts to work with Sublime Text 3. By the end of this tutorial, you would be familiar with ST's most important and frequently used shortcuts and features. Installation Via Package Control: Install Package Cont...

sublimetext3 • Getting started with sublimetext3

Using the wrong operator

In OCaml, there are different arithmetic operators for floats and integers. Additionally, these operators can only be used on 2 floats or 2 integers. Here are invalid expressions in OCaml 1.0 + 2.0 1 + 2.0 1 +. 2 1 +. 2.0 The correct expression for each of these respectively are 1. +. 2. fl...

OCaml • Common Pitfalls

Using sealed trait and case objects and allValues-macro

This is just an extension on the sealed trait variant where a macro generates a set with all instances at compile time. This nicely omits the drawback that a developer can add a value to the enumeration but forget to add it to the allElements set. This variant especially becomes handy for large en...

Scala Language • Enumerations

Activating developer mode in Odoo 8

When you logged into Odoo application you will find an option to see who is the current logged in person in the top right corner. This user information have a dropdown button. Click on the dropdown, then you will find a list. In that list select about Odoo.com option. Clicking on that will open a Ab...

odoo-8 • How to activate OpenERP Developer Mode

Compound view for SVG/VectorDrawable as drawableRight

Main motive to develop this compound view is, below 5.0 devices does not support svg in drawable inside TextView/EditText. One more pros is, we can set height and width of drawableRight inside EditText. I have separated it from my project and created in separate module. Module Name : custom_edit_d...

Android • Creating Custom Views

The currentColor keyword

currentColor is most usefull in inline SVGs. With this you can inherit the parents css color and use it everywhere colors are used in SVG. In this example the first circle uses the text color as fill color, and the second circle uses it as the stroke color. <html> <head> ...

SVG • Colors

Reading XML form URL with Retrofit 2

We will use retrofit 2 and SimpleXmlConverter to get xml data from url and parse to Java class. Add dependency to Gradle script: compile 'com.squareup.retrofit2:retrofit:2.1.0' compile 'com.squareup.retrofit2:converter-simplexml:2.1.0' Create interface Also create xml class wrapper in our cas...

Android • Retrofit2

Powershell external collector script function

<# .DESCRIPTION Writes the metric out in bosun external collector format which is compatible with scollector external scripts .PARAMETER metric Name of the metric (eg : my.metric) .PARAMETER type Type of metric (counter, gauge, etc) .PARAMETER unit ...

Bosun • Scollector: External Collectors

Arrays

Array declaration in Powershell is almost the same as instantiating any other variable, i.e. you use a $name = syntax. The items in the array are declared by separating them by commas(,): $myArrayOfInts = 1,2,3,4 $myArrayOfStrings = "1","2","3","4" Adding...

PowerShell • Variables in PowerShell

Create configuration in the app/config/config.yml

amazingservice: url: 'http://amazing.com' client_id: 'test_client_1' client_secret: 'test_secret' This is a basic example for create configuration in yml format, for following the yml format you can take deeper configuration.

symfony2 • Configuration for own bundles

Set the config in the created bundle

For instance you have a bundle, which generated by the symfony console. In this case in the DependencyInjection/Configuration.php you have to insert your configuration representation: $treeBuilder = new TreeBuilder(); $rootNode = $treeBuilder->root('amazingservice'); $rootNod...

symfony2 • Configuration for own bundles

Request a merkle block with bitcore-p2p

In this example we will ask the bitcoin network for the merkle block number 442603. In order to do this we need to send a filterload message and then we have to send a getdata message using the inventory type MSG_MERKLEBLOCK. The peers should reply with a merkleblock message for the requested bloc...

bitcoin • Thin Clients

Why Use Getters and Setters?

Consider a basic class containing an object with getters and setters in Java: public class CountHolder { private int count = 0; public int getCount() { return count; } public void setCount(int c) { count = c; } } We can't access the count variable because it's private. But we can ac...

Java Language • Getters and Setters

Keyboard short-cut to replace currenlty highlighted word

For example, with following nmap: nmap <expr> <S-F6> ':%s/' . @/ . '//gc<LEFT><LEFT><LEFT>' select a word with *, type Shift-F6, type in a replacement and hit Enter to rename all occurrences interactively.

vim • Substitution

Basic Verbs

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...

dplyr • Getting started with dplyr

No-Argument method mocking

interface Mockable { bool DoSomething(); } var mock = new Mock<Mockable>(); mock.Setup(x => x.DoSomething()).Returns(true); var result = mock.Object.DoSomething(); //true

moq • Mocking Behavior

Steps to Move One table of MySQL to another table in postgres:

Click on New Files --> Transformation once a new transformation is open, Click on views tab ,under views create two connections (source ) and (destination). source: table where data is available destination: table where you want to push your data. Once done. on the top bar you have tools -...

kettle • Transfer Data from one Database to another using Kettle (PDI)

Electron Tray App

Adding a icon to your tray-bar let tray = null; let mainWindow = null; let user = null; app.on('ready', () => { /** * Tray related code. */ const iconName = 'icon.png'; const iconPath = path.join(__dirname, iconName); tray = new Tray(iconPath); tray.setT...

electron • Electron-tray-app

Helper Functions

Helper functions are used in conjunction with select to identify variables to return. Unless otherwise noted, these functions expect a string as the first parameter match. Passing a vector or another object will generate an error. library(dplyr) library(nycflights13) starts_with starts_with al...

dplyr • Getting started with dplyr