Tutorial by Examples: l

Installation or Setup

Detailed instructions on getting ipad set up or installed.

ipad • Getting started with ipad

To install the Pug template rendering system, follow these steps: Have the Node.js environment installed on your machine Run npm install pug --save to install the pug module to your current project. You can now use pug in your project through the standard require mechanism: const pug = requi...

pug • Getting started with pug

Producer / consumer example

pthread_mutex_t queueMutex; pthread_cond_t queueCond; Queue queue; void Initialize() { //Initialize the mutex and the condition variable pthread_mutex_init(&queueMutex, NULL); pthread_cond_init(&queueCond, NULL); } void Producer() { //First we get some new data ...

pthreads • Conditional Variables

Installation or Setup

Detailed instructions on getting push-notification set up or installed.

push-notification • Getting started with push-notification

Basic examples

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...

Haskell Language • Arithmetic

`Could not deduce (Fractional Int) ...`

The error message in the title is a common beginner mistake. Let's see how it arises and how to fix it. Suppose we need to compute the average value of a list of numbers; the following declaration would seem to do it, but it wouldn't compile: averageOfList ll = sum ll / length ll The problem is...

Haskell Language • Arithmetic

Function examples

What's the type of (+) ? λ> :t (+) (+) :: Num a => a -> a -> a What's the type of sqrt ? λ> :t sqrt sqrt :: Floating a => a -> a What's the type of sqrt . fromIntegral ? sqrt . fromIntegral :: (Integral a, Floating c) => a -> c

Haskell Language • Arithmetic

Get the HTML content of CKEditor

Create a file ckeditor-content.html with the following content: <!DOCTYPE html> <html> <head> <title>CKEditor Get Content Demo!</title> </head> <body> <script src="//cdn.ckeditor.com/4.6.1/basic/ckeditor.js"></script> ...

ckeditor • Getting started with ckeditor

Enumerating through keys and Key-Value Pairs

Enumerating through Keys foreach ($key in $var1.Keys) { $value = $var1[$key] # or $value = $var1.$key } Enumerating through Key-Value Pairs foreach ($keyvaluepair in $var1.GetEnumerator()) { $key1 = $_.Key1 $val1 = $_.Val1 }

PowerShell • HashTables

Dual-purpose modules (refinements or global patches)

It's a good practice to scope patches using Refinements, but sometimes it's nice to load it globally (for example in development, or testing). Say for example you want to start a console, require your library, and then have the patched methods available in the global scope. You couldn't do this wit...

Ruby Language • Refinements

Plot live data from pipe with matplotlib

This can be usefull when you want to visualize incoming data in real-time. This data could, for example, come from a microcontroller that is continuously sampling an analog signal. In this example we will get our data from a named pipe (also known as a fifo). For this example, the data in the pipe ...

matplotlib • Animations and interactive plotting

Assigning function to a variable

struct Mathematics { internal func performOperation(inputArray: [Int], operation: (Int)-> Int)-> [Int] { var processedArray = [Int]() for item in inputArray { processedArray.append(operation(item)) } retur...

Swift Language • Function as first class citizens in Swift

Master Detail Navigation

The code below shows how to perform asynchronous navigation when the app is in a MasterDetailPage context. public async Task NavigateMasterDetail(Page page) { if (page == null) { return; } var masterDetail = App.Current.MainPage as Mas...

Xamarin.Forms • Navigation in Xamarin.Forms

Installation or Setup

Detailed instructions on getting sharepoint-2013 set up or installed.

sharepoint-2013 • Getting started with sharepoint-2013

Accessing form fields

You can access the form data submitted via a POST or PUT request in Flask via the request.form attribute. from flask import Flask, request app = Flask(import_name=__name__) @app.route("/echo", methods=["POST"]) def echo(): name = request.form.get("name"...

Flask • Accessing request data

Non-escaping closure

In Swift 1 and 2, closure parameters were escaping by default. If you knew your closure wouldn’t escape the function body, you could mark the parameter with the @noescape attribute. In Swift 3, it’s the other way around: closure parameters are non-escaping by default. If you intend for it to escape...

Swift Language • Blocks

Escaping closure

From Swift Documentarion @escaping Apply this attribute to a parameter’s type in a method or function declaration to indicate that the parameter’s value can be stored for later execution. This means that the value is allowed to outlive the lifetime of the call. Function type parameters wi...

Swift Language • Blocks

ElementHost WPF TextBox

This example is was modeled after an example that I found on the internet. I can't find the link or I would give the author credit. I took the sample that I found and modified it to work for my application. Add the following references: System.Xaml, PresentationCore, PresentationFramework,...

Visual Basic .NET Language • WinForms SpellCheckBox

.profile vs .bash_profile (and .bash_login)

.profile is read by most shells on startup, including bash. However, .bash_profile is used for configurations specific to bash. For general initialization code, put it in .profile. If it's specific to bash, use .bash_profile. .profile isn't actually designed for bash specifically, .bash_profile is...

Bash • File execution sequence

Define a step value of 7

<RangeSeekBar android:id="@+id/barPrice" android:layout_width="fill_parent" android:layout_height="wrap_content" app:barHeight="0.2dp" app:barHeight2="4dp" app:increment="7" ...

Android • Define step value (increment) for custom RangeSeekBar