chaitanyagupta

Reader Macros in Common Lisp

This post also appears on lisper.in.

Reader macros are perhaps not as famous as ordinary macros. While macros are a great way to create your own DSL, reader macros provide even greater flexibility by allowing you to create entirely new syntax on top of Lisp.

Paul Graham explains them very well in [On Lisp][] (Chapter 17, Read-Macros):

The three big moments in a Lisp expression's life are read-time, compile-time, and runtime. Functions are in control at runtime. Macros give us a chance to perform transformations on programs at compile-time. ...read-macros... do their work at read-time.

tylerneylon

-- Two dashes start a one-line comment.

--[[
     Adding two ['s and ]'s makes it a
     multi-line comment.
--]]

----------------------------------------------------
-- 1. Variables and flow control.
----------------------------------------------------

Split82

Shader "Name" {

    Properties {

        _Name ("display name", Range (min, max)) = number
        _Name ("display name", Float) = number
        _Name ("display name", Int) = number
        _Name ("display name", Color) = (number,number,number,number)
        _Name ("display name", Vector) = (number,number,number,number)

jiewpeng

This gist describes how to add Anaconda Prompt to the Windows right click context menu. This is because at some point, Anaconda no longer adds itself to the PATH after installation.

1. Run regedit.exe
2. Navigate to HKEY_CLASSES_ROOT > Directory > Background > shell
3. Add a key named AnacondaPrompt and set its value to "Anaconda Prompt Here" (or anything you'd like it to appear as in the right click context menu)
4. Add a key under this key, called command, and set its value to cmd.exe /K C:\Anaconda3\Scripts\activate.bat (may have to change the activate.bat file to whereever Anaconda is installed)

h3r2tic

// Copyright (c) 2023 Tomasz Stachowiak
//
// This contribution is dual licensed under EITHER OF
// 
//     Apache License, Version 2.0, (http://www.apache.org/licenses/LICENSE-2.0)
//     MIT license (http://opensource.org/licenses/MIT)
// 
// at your option.

#include "/inc/frame_constants.hlsl"

WahlbeckUEFN

using { /Fortnite.com/Devices }
using { /Fortnite.com/Characters }
using { /Verse.org/Simulation }
using { /Verse.org/Random }
using { /UnrealEngine.com/Temporary/Diagnostics }
using { /UnrealEngine.com/Temporary/UI }
using { /Fortnite.com/UI }
using { /UnrealEngine.com/Temporary/SpatialMath}
using { /Verse.org/Colors }

MattRix

using UnityEngine;
using System.Collections;
using System;

[RequireComponent (typeof(Rigidbody))]
public class PhysicsFollower : MonoBehaviour 
{
	public Transform target;

	Rigidbody rb;

banksean

/*
  I've wrapped Makoto Matsumoto and Takuji Nishimura's code in a namespace
  so it's better encapsulated. Now you can have multiple random number generators
  and they won't stomp all over eachother's state.
  
  If you want to use this as a substitute for Math.random(), use the random()
  method like so:
  
  var m = new MersenneTwister();

MattRix

ScriptableObject Icon
_Popup
_Help
Clipboard
SocialNetworks.UDNOpen
SocialNetworks.Tweet
SocialNetworks.FacebookShare
SocialNetworks.LinkedInShare
SocialNetworks.UDNLogo
animationvisibilitytoggleoff

mattyellen

public static class ExtensionMethods
{
    public static TaskAwaiter GetAwaiter(this AsyncOperation asyncOp)
    {
        var tcs = new TaskCompletionSource<object>();
        asyncOp.completed += obj => { tcs.SetResult(null); };
        return ((Task)tcs.Task).GetAwaiter();
    }
}