LukeB42 LukeB42

XT.js

Let's close the ultra-small library cycle with some awesome array-based templating. 323 bytes minified.

How to obtain

Just download the minified version here or include it into your code:

Orthodox C++

What is Orthodox C++?

Orthodox C++ (sometimes referred as C+) is minimal subset of C++ that improves C, but avoids all unnecessary things from so called Modern C++. It's exactly opposite of what Modern C++ suppose to be.

Why not Modern C++?

These links no longer work. Springer have pulled the free plug.

Graduate texts in mathematics

duplicates = multiple editions

A Classical Introduction to Modern Number Theory, Kenneth Ireland Michael Rosen

Flask-SQLAlchemy Caching

The following gist is an extract of the article Flask-SQLAlchemy Caching. It allows automated simple cache query and invalidation of cache relations through event among other features.

Usage

retrieve one object

# pulling one User object

user = User.query.get(1)

Easy parallel python with concurrent.futures

As of version 3.3, python includes the very promising concurrent.futures module, with elegant context managers for running tasks concurrently. Thanks to the simple and consistent interface you can use both threads and processes with minimal effort.

For most CPU bound tasks - anything that is heavy number crunching - you want your program to use all the CPUs in your PC. The simplest way to get a CPU bound task to run in parallel is to use the ProcessPoolExecutor, which will create enough sub-processes to keep all your CPUs busy.

We use the context manager thusly:

with concurrent.futures.ProcessPoolExecutor() as executor:

	'''
	matplotlib must be developer release for voxel support
	install instructions:
	https://matplotlib.org/devdocs/users/installing.html
	'''

	import matplotlib.pyplot as plt
	import numpy as np
	from mpl_toolkits.mplot3d import Axes3D
	import matplotlib.animation as manimation


	#Evolution Strategies with Keras
	#Based off of: https://blog.openai.com/evolution-strategies/
	#Implementation by: Nicholas Samoray

	#README
	#Meant to be run on a single machine
	#APPLY_BIAS is currently not working, keep to False
	#Solves Cartpole as-is in about 50 episodes
	#Solves BipedalWalker-v2 in about 1000

	#!/usr/bin/env python
	from __future__ import print_function
	from keras.models import Sequential
	from keras.layers import TimeDistributed
	from keras.layers.core import Dense, Activation, Dropout, RepeatVector, TimeDistributedDense
	from keras.layers.recurrent import LSTM
	from keras.utils.data_utils import get_file
	import numpy as np
	import random,string
	import sys

	#!/usr/bin/env bash

	# set -x

	if [[ $EUID -ne 0 ]]; then
	echo "You must be root to run this script"
	exit 1
	fi

	# Returns all available interfaces, except "lo" and "veth*".

	////////////////////////////////////////////////////////////////
	//
	// Defer statement
	// - Akin to D's SCOPE_EXIT or similar to Go's defer but scope-based
	//
	////////////////////////////////////////////////////////////////
	#if defined(__cplusplus)
	extern "C++" {
	// NOTE(bill): Stupid fucking templates
	template <typename T> struct gbRemove_Reference { typedef T Type; };