halferty’s gists

halferty / main.c

Created October 7, 2016 02:11

	#include <stdio.h>
	#include <stdlib.h>
	#include <unistd.h>
	#include <X11/X.h>
	#include <X11/Xlib.h>
	#include <X11/Xutil.h>
	#include <GL/gl.h>
	#include <GL/glx.h>
	#include <GL/glu.h>
	struct Hints {

halferty / mutate.py

Created August 31, 2016 19:26

Slowly mutate User-Agent over time for fun and profit.

	#!/usr/bin/env python

	import random

	def mutator():
	mutated = False
	chars = list(mutator.mutatee)
	for i, ch in enumerate(chars):
	if not mutated and ch.isalnum() and random.random() > 0.999:
	if ch.isalpha():

halferty / localtime.sh

Created August 25, 2016 14:42

Use RVM in a shell script

	#!/bin/bash

	source ~/.rvm/scripts/rvm
	rvm use 2.3.1@bin && ruby -e "require 'active_support/time'; puts DateTime.parse(\"$1\").in_time_zone('America/Los_Angeles')"

halferty / reset_branch.sh

Last active January 17, 2018 19:09

Reset git directory to a known state - no questions asked (have a simpler version? are you sure? what if you're in the middle of a rebase and have untracked files?)

	alias nuke-nuke-branch="nnuke_branch"
	alias nuke-branch="nuke_branch"

	function nuke_branch()
	{
	if [ $# -eq 1 ]; then
	git clean -f -d
	git rebase --abort
	git branch -D tempbranch &> /dev/null
	find . -name "post-checkout" \| xargs rm -rf

halferty / ruby-metaprogramming-singleton_class2.rb

Created June 23, 2016 23:41

Ruby metaprogramming

	[1] pry(main)> a = String.new
	=> ""

	[2] pry(main)> b = String.new
	=> ""

	[3] pry(main)> a.class.send(:define_method, "available_on_all_strings") { \|a, b\| "And the result is: " + a.to_s + b.to_s }
	=> :available_on_all_strings

	[4] pry(main)> a.available_on_all_strings(1, 2)

halferty / ruby-metaprogramming-singleton_class.rb2

Last active June 23, 2016 23:41

Ruby metaprogramming with singleton_class

	[1] pry(main)> a = Object.new
	=> #<Object:0x007f90fc8f40f0>
	[2] pry(main)> a.singleton_class
	=> #<Class:#<Object:0x007f90fc8f40f0>>
	[3] pry(main)> a.singleton_class.send(:define_method, "asdf") { \|a\| "hi there " + a }
	=> :asdf
	[4] pry(main)> a.asdf
	ArgumentError: wrong number of arguments (0 for 1)
	from (pry):3:in `block in __pry__'
	[5] pry(main)> a.asdf("gg")

halferty / ruby-metaprogramming-to_proc.rb

Last active June 23, 2016 22:18

Ruby metaprogramming w/ to_proc

	[1] pry(main)> require 'json'
	=> true
	[2] pry(main)> [1, 2, 3].to_json
	=> "[1,2,3]"
	[3] pry(main)> [[1, 2, 3], [4, 5, 6], [7, 8, 9]].map &:to_json
	=> ["[1,2,3]", "[4,5,6]", "[7,8,9]"]
	[4] pry(main)> JSON.parse("[1,2,3]")
	=> [1, 2, 3]
	[5] pry(main)> ["[1,2,3]", "[4,5,6]", "[7,8,9]"].map &JSON.method(:parse)
	=> [[1, 2, 3], [4, 5, 6], [7, 8, 9]]

halferty / convert_pdf.bat

Last active June 13, 2016 08:59

Convert PDF to PNGs, one per page

	"C:\Program Files\gs\gs9.19\bin\gswin64.exe" -dNOPAUSE -dBATCH -sDEVICE=png16m -r600 -dDownScaleFactor=3 -sOutputFile=C:\Users\ed\Desktop\test_images\test-%%03d.jpg C:\Users\ed\Desktop\test.pdf

	pause

halferty / glfptr.cpp

Created March 31, 2016 04:30

gl grab function pointer

void (*glGenBuffers)(GLsizei n, GLuint * buffers) = (void (*)(GLsizei, GLuint *))wglGetProcAddress("glGenBuffers");

halferty / findclosest.scala

Created March 18, 2016 19:19

Find closest item in list to target using scala Ordering

	case class Asset(width:Int, url:String)
	val a = Asset(100, "asdf") :: Asset(200, "asdf") :: Asset(210, "asdf") :: Nil
	val target = 209
	a.min(Ordering.by((asset:Asset) => Math.abs(target - asset.width)))

EH halferty