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Clojure Destructuring Tutorial and Cheat Sheet

(Related blog post)

Simply put, destructuring in Clojure is a way extract values from a datastructure and bind them to symbols, without having to explicitly traverse the datstructure. It allows for elegant and concise Clojure code.

Vectors and Sequences

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;; https://stackoverflow.com/questions/11409140/stumped-with-functional-breadth-first-tree-traversal-in-clojure

(def tree [1 [2 [4] [5]] [3 [6]]])

(defn bfs
  [tree]
  (loop [ret []
         queue (conj [] tree)]
    (if (seq queue)
      (let [[node & children] (first queue)]

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;; metacircular evaluator from sicp
(define apply-in-underlying-scheme apply)
(define (list-of-values exps env)
  (if (no-operands? exps)
    '()
    (cons (eval (first-operand exps) env)
          (list-of-values (rest-operands exps) env))))

(define (eval-if exp env)
  (if (true? (eval (if-predicate exp) env))

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import types

# Helpers
# =======
def _obj():
  '''Dummy object'''
  return lambda: None

_FILLER = _obj()

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Exporting orgmode files in high density cheatsheet format.

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import sys
import ast

origin_import = __import__
AST = {}


def custom_import(name, *args, **kwargs):
    module = origin_import(name, *args, **kwargs)
    if not hasattr(module, '__file__'):

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GPL3 LICENSE SYNOPSIS

TL;DR* Here's what the license entails:

1. Anyone can copy, modify and distribute this software.
2. You have to include the license and copyright notice with each and every distribution.
3. You can use this software privately.
4. You can use this software for commercial purposes.
5. If you dare build your business solely from this code, you risk open-sourcing the whole code base.

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#!/usr/bin/env python

import gym
import numpy as np
import tensorflow as tf


class PolicyGradientAgent(object):

    def __init__(self, hparams, sess):

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"""
A perl Data.Dumper clone for Python
Author: simon@log4think.com
2011-07-08
"""
#!/bin/env python

import sys
from types import *

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#! /usr/bin/env python
'''
	Simple example demonstrating how to take a screenshot
'''
import time
import sys
import os
import argparse

#OpenGL