David Chambers davidchambers
davidchambers
/ clean-diff.diff
Last active
August 29, 2015 13:56
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| var alib = require('alib'); | |
| var blib = require('blib'); | |
| var clib = require('clib'); | |
| +var zlib = require('zlib'); | |
| var fruits = [ | |
| 'apples', | |
| 'bananas', | |
| 'cherries', |
davidchambers
/ coffeescript-style-guide.md
Created
December 8, 2013 19:42
davidchambers
/ ismodule
Created
November 4, 2013 01:58
Determine whether a JavaScript file is an AMD module
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| #!/usr/bin/env coffee | |
| esprima = require 'esprima' | |
| isModule = (source) -> | |
| esprima.parse(source).body.some (node) -> | |
| node.type is 'ExpressionStatement' and | |
| node.expression.type is 'CallExpression' and | |
| node.expression.callee.type is 'Identifier' and |
davidchambers
/ permutations.coffee
Created
October 27, 2013 18:25
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| concat = (lists...) -> | |
| [].concat(lists...) | |
| _traverse = (list, path, f) -> | |
| if list.length is 0 | |
| f(path) | |
| else | |
| for item, idx in list | |
| _traverse(concat(list.slice(0, idx), list.slice(idx + 1)), | |
| concat(path, [item]), f) |
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| DATE | |
| TBD. Probably 2014-01-04 or 2014-01-05. | |
| VENUE | |
| TBD. Somewhere in Auckland, New Zealand. | |
davidchambers
/ example.py
Created
October 16, 2013 18:16
The right approach to memoization: keep it separate
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| import time | |
| def memoize(f): | |
| memo = {} | |
| def wrapper(*args): | |
| if args not in memo: | |
| memo[args] = f(*args) | |
| return memo[args] | |
| return wrapper |
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| ROUND 1 | |
| Darryn 2 v 0 James | |
| Dan 2 v 0 Matt | |
| Doug 0 v 2 David | |
| ROUND 2 | |
| Darryn 2 v 0 David | |
| James 2 v 1 Dan |
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| FILES = ( | |
| 'foo.txt', | |
| 'bar.txt', | |
| 'baz.txt', | |
| ) | |
| def getmetadata(path): | |
| return {'blah': True, 'quux': 42} |
davidchambers
/ app.coffee
Last active
December 20, 2015 19:09
Express routing using regular expressions with named capturing groups
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| express = require 'express' | |
| app = express() | |
| app.param (name, arg) -> switch Object::toString.call arg | |
| when '[object RegExp]' | |
| (req, res, next, val) -> | |
| if arg.test val then next() else next 'route' |
- avoid unnecessary state
- favor pure functions over impure functions
- functions should not have surprising side effects
- give things meaningful names, and avoid aliases
- don't swallow unexpected errors