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Cyclic redundancy check

Matt Audesse mattaudesse

Cyclic redundancy check
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kritzcreek /
Last active Jan 20, 2019
Teaching Polymorphism

"Is Haskell a good first programming language?"

This question was asked at the recent HaskellX conference, with both practicioners as well as teachers being present. I won't reiterate everything that was said, and instead link to a recording of the podium discussion (

One particular argument, that I've heard come up multiple times now, is that teachers are complaining about the length function being polymorphic. Apparently length :: forall a. Foldable f => f a -> Int is hard to grasp/understand/accept for a new-comer. The solutions proposed to solve this problem are to:

  1. Return length to its non-Foldable type
  2. Use a custom Prelude to teach beginners

Drawbacks for 1 include that practicioners like the fact that length works for all kinds of data structures, and don't want that taken away from them. The primary problem with solution 2 is that students can't go and use their aquired knowledge to work on Open

View eslintrc.browser.yaml
root: true
extends: eslint:recommended
ecmaVersion: 2017
impliedStrict: true
sourceType: module
es6: true
browser: true
twopoint718 / Reader.lhs
Last active Oct 28, 2019
An article about the Reader type (functor, applicative, and monad instances)
View Reader.lhs
Okay, so I'll try and walk through the reader monad as best as I can. And
because I think it helps to de-mystify things a bit, I'll also go through
all of the "super classes" of monad: functor and applicative (because every
monad should also be an applicative and every applicative functor should be
a functor). This file is literate Haskell so you should just be able to
load it in the REPL or run it. It's also kinda/sorta markdown, so it should
render that way as well (but the code is formatted wrong).
> module Reader where
soupi / Main.purs
Created Dec 5, 2015
simple purescript-signal + purescript-canvas example
View Main.purs
module Main where
import Prelude
import Data.Maybe
import Control.Monad.Eff
import Graphics.Canvas as C
import Signal as S
import Signal.DOM as S
paf31 / UnderscoreFFI.js
Last active Jul 3, 2017
Minimal UnderscoreJS Binding for PureScript
View UnderscoreFFI.js
"use strict";
// module UnderscoreFFI = function(f) {
return function (arr) {
return require('underscore').map(arr, f);
bradmontgomery / install-comodo-ssl-cert-for-nginx.rst
Last active Feb 4, 2020
Steps to install a Comodo PositiveSSL certificate with Nginx.
View install-comodo-ssl-cert-for-nginx.rst

Setting up a SSL Cert from Comodo

I use as a registrar, and they resale SSL Certs from a number of other companies, including Comodo.

These are the steps I went through to set up an SSL cert.

Purchase the cert

quchen / trolling_haskell
Last active Jan 14, 2020
Trolling #haskell
View trolling_haskell
13:16 <luite> | hello
13:16 <ChongLi> | somebody has a mental illness!
13:16 <merijn> | Wow...I suddenly see the error of my ways and feel
| compelled to write Node.js!
13:16 <genisage> | hi
13:16 <luite> | you might be pleased to learn that you can compile
| haskell to javascript now

tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

# remap prefix to Control + a
CristinaSolana / gist:1885435
Created Feb 22, 2012
Keeping a fork up to date
View gist:1885435

1. Clone your fork:

git clone

2. Add remote from original repository in your forked repository:

cd into/cloned/fork-repo
git remote add upstream git://
git fetch upstream
ijt / io_quickcheck_example.hs
Created May 11, 2011
Simple example of monadic IO with QuickCheck in Haskell
View io_quickcheck_example.hs
#!/usr/bin/env runhaskell
-- Synopsis:
-- $ cabal install QuickCheck
-- $ runhaskell io_quickcheck_example.hs
-- Author: Issac Trotts <>
import Directory
import System.Environment
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