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using System;
using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace UnitTests
{
    /// <summary>
    /// Fluent interface for expected exceptions.
    /// </summary>
    /// <example>
    /// Expect.Exception(() => DoSomethingBad())

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<?php
/// Start of a PayPal fee calculator that I'll probably never finish. :-[

/*
Given:
total(cost, fee) := cost + fee(cost)
fee(cost) := F + P*cost
F := $0.30
P := 2.9%

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using System;
using System.Collections.Concurrent;
using System.Threading.Tasks;

public interface ILogger
{
    void Log(string message);
}

class AsyncLogger : ILogger, IDisposable

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using System.Collections.Generic;

public static class ObjectHelper
{
	public static IEnumerable<T> AsEnumerable<T>(this T self)
	{
		yield return self;
	}
}

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#!/bin/sh
# https://bbs.archlinux.org/viewtopic.php?id=150620

# xinit homm2.xinitrc -- :1
startx -- -depth 16 homm2.xinitrc :1

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using System;
using Microsoft.VisualStudio.TestTools.UnitTesting;

sealed class OptionalDependency<T> where T : class
{
    private OptionalDependency() { }

    private OptionalDependency(T defaultDependency)
    {
        if (defaultDependency == null)

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<input type="file" id="input">
<br />
<pre id="output"></pre>

<script>
  var output = document.getElementById("output");
  var input = document.getElementById("input");

  function handleFiles() {
    var file = this.files[0];

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C Metaprogramming

Macros are used for metaprogramming in C. As an example, a generic List is typically implemented with macros, such as LIST_HEAD_INIT in the Linux kernal or LL_* in (https://troydhanson.github.io/uthash/utlist.html).

I tend to dislike macros, especially ones that emulate control structures and function-macros liberally shrewn about the code. I do like the idea of C++ metaprogramming, but it can get a bit obscure.

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// before:
var LoginLink = props => (
  {!props.loggedIn &&
    <a href="#login">Login</a>
  }
);

const Visible = props => props.when && props.children;

// after:

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module.exports = {
    "extends": "airbnb-base"
};