Matthijs Hollemans hollance

Barfdown: a Markdown-ish Parser Written in Swift

Goals for this project:

Parse a simplified version of Markdown that is good enough for writing my blog posts.
Be reasonably efficient. This means the parser shouldn't copy substrings around if not necessary. This is done by storing all the elements as indexes into the original text.
Be small and therefore be easy to understand.
No regular expressions. They are the lazy person's solution to parsing. ;-)

This is just a toy project for me to experiment with writing parsers in Swift. Because why not?

	import numpy as np

	i = np.array(list(range(1, 50)), dtype=np.float).reshape((7, 7))
	k = np.array(list(range(1, 10)), dtype=np.float).reshape((3, 3))

	print("Input:"); print(i)
	print("Kernel:"); print(k)

	# Forward convolution. We need to pad the input so that we can read from
	# its borders. (Not doing stride etc here.)

	/*
	The "hello world" of neural networks: a simple 3-layer feed-forward
	network that implements an XOR logic gate.

	The first layer is the input layer. It has two neurons a and b, which
	are the two inputs to the XOR gate.

	The middle layer is the hidden layer. This has two neurons h1, h2 that
	will learn what it means to be an XOR gate.

	import Cocoa

	let input = "15,7, 3 ,, [1,2,[3, 4, 5], 6],8"
	//let input = "5,7,[1]"

	var index = input.characters.startIndex
	var lookahead = input[index]
	var done = false

	func eat() {

	/*
	Joseph Weizenbaum's classic ELIZA chat bot in Swift.

	Based on the IBM PC BASIC program from CREATIVE COMPUTING by Patricia
	Danielson and Paul Hashfield, and the Java adaptation by Jesper Juul.

	Run this script from Terminal:
	$ swift eliza.swift

	Press Ctrl-C or Ctrl-D to quit. (Or type "shut up".)

	; *****************************************************************************
	;
	; $VER: ZeroGravity Source 1.0 (C) 1997 Matthijs Hollemans
	;
	; *****************************************************************************
	;
	; This is the full source code to Zero Gravity. I used the very cool ASM-One
	; V1.29 assembler from T.F.A. but that doesn't matter anyway because you won't
	; be able to reassemble this without the required binary includes...
	;

	; START OF BLITZ 2 SOURCE

	; EVIL INSECTS
	; ============
	; Last changed: 30-06-94 (still 45 days and then...I'm 18)
	; Author: Matthijs Hollemans

	; This is the CHEATMODE, type it in correctly and you will be
	; given 9 lives!
	;

	import Foundation

	/**
	Minimizes a continuous differentiable multivariate function.

	Usage:

	let (X, fX, i) = fmincg(f, X, length)

	The starting point is given by `X` (a row vector).

	public class LinkedListNode<T: Comparable> {
	var value: T
	var next: LinkedListNode?
	var previous: LinkedListNode?

	public init(value: T) {
	self.value = value
	}
	}