Chad Luo chadluo

3 Python modules you can use directly on the CLI

1. Start a local webserver to serve the file of your current directory on the LAN:

# Python version 2.x:
python -m SimpleHTTPServer 
# Python version 3.x:
python3 -m http.server

Haskell blogs worth reading

This is a (hopefully) short list of Haskell blogs I consider worth reading for intermediate Haskellers.

FPComplete School of Haskell
- A collection of helpful tutorials, great for any Haskeller, novice or ninja.
The Comonad.Reader
- Like the one above, maintained by various Haskellers, with many helpful posts.
Edward Z. Yang
Features a number of blog readings that are concise and accessible.

ES6 Grammar

Generated using http://github.com/rbuckton/grammarkdown

SourceCharacter ::
any Unicode code point

InputElementDiv ::
WhiteSpace
LineTerminator
Comment

A Quick and Dirty Lens primer

Why does Lens exist? Well, Haskell records suck, for a number of reasons. I will enumerate them using this sample record.

data User = User { login    :: Text
                 , password :: ByteString
                 , email    :: Text
                 , created  :: UTCTime
 }

This blog post series has moved here.

You might also be interested in the 2016 version.

This is material to go along with a 2014 Boston Haskell talk.

We are going to look at a series of type signatures in Haskell and explore how parametricity (or lack thereof) lets us constrain what a function is allowed to do.

Let's start with a decidedly non-generic function signature. What are the possible implementations of this function which typecheck?

wrangle :: Int -> Int

New Mac

###Browsers

Chrome
- GoogleChrome
- DirectLink
Firefox

###Editors && IDE

Emacs4Mac Latest Build

常用的 HTML 头部标签

详细介绍参见原文：yisibl/blog#1

<!DOCTYPE html> <!-- 使用 HTML5 doctype，不区分大小写 -->
<html lang="zh-cmn-Hans"> <!-- 更加标准的 lang 属性写法 http://zhi.hu/XyIa -->
<head>
    <meta charset='utf-8'> <!-- 声明文档使用的字符编码 -->
    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" /> <!-- 优先使用 IE 最新版本和 Chrome -->

	module PyramidSlideDown where

	-- import Data.Foldable as F
	import Control.Arrow

	longestSlideDown :: [[Int]] -> Int
	longestSlideDown = foldl1 combine >>> maximum
	where
	xs `combine` ys = head ls : zipWith max (tail ls) (init rs) ++ [last rs]
	where

	{
	"name": "my-app",
	"version": "1.0.0",
	"description": "My test app",
	"main": "src/js/index.js",
	"scripts": {
	"jshint:dist": "jshint src/js/*.js",
	"jshint": "npm run jshint:dist",
	"jscs": "jscs src/*.js",
	"browserify": "browserify -s Validating -o ./dist/js/build.js ./lib/index.js",