William Ting wting

When installing Haskell Platform fails on Mac OS X (with quick fix below)

I was fighting with Haskell last weekend. At first, I couldn't install some missing libraries with Cabal, and then, when trying to find out what's wrong, I ended up removing the whole Haskell installation — only to find out I could no longer install neither the Haskell Platform nor even just Cabal Install! The warnings I would see were more or less about the use of the single quote in source code:

Preprocessing library text-0.11.2.3...

Data/Text.hs:6:52:
     warning: missing terminating ' character [-Winvalid-pp-token]

Haskell Resources

The Learning Haskell guide has been moved to a git repo to enable outside contribution

Find it here: https://github.com/bitemyapp/learnhaskell

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

Clarify and agree on the scope of the system

User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?

	# On slow systems, checking the cached .zcompdump file to see if it must be
	# regenerated adds a noticable delay to zsh startup. This little hack restricts
	# it to once a day. It should be pasted into your own completion file.
	#
	# The globbing is a little complicated here:
	# - '#q' is an explicit glob qualifier that makes globbing work within zsh's [[ ]] construct.
	# - 'N' makes the glob pattern evaluate to nothing when it doesn't match (rather than throw a globbing error)
	# - '.' matches "regular files"
	# - 'mh+24' matches files (or directories or whatever) that are older than 24 hours.
	autoload -Uz compinit

	import binascii
	import struct


	class Punk(object):

	_END_CHUNK_TYPE = 'IEND'
	_PUNK_CHUNK_TYPE = 'puNk'
	_MAX_BYTES = 2147483647
	_chunks = dict()