Skip to content

Instantly share code, notes, and snippets.

Avatar

Pavel Kulyov pkulev

View GitHub Profile
@pkulev
pkulev / _reader-macros.md
Created Apr 25, 2018 — forked from chaitanyagupta/_reader-macros.md
Reader Macros in Common Lisp
View _reader-macros.md

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.

@pkulev
pkulev / ecs_example.py
Created Nov 19, 2015 — forked from SpotlightKid/ecs_example.py
Example of plumbing needed to use the ecs package
View ecs_example.py
#!/usr/bin/env python
# -*- coding: utf-8 -*-
import time
from ecs import Component, Entity, EntityManager, System, SystemManager
class MovementSystem(System):
"""Movement system to update position of Movable components."""