Christian Takle christiantakle

Introducing the `stack hoogle` feature!

With the release of hoogle5, we can now hoogle all local packages.

This let us implement stack hoogle, which is on the master branch of stack, but is not yet on a stack release. We'd like you to try it out before we do!

To upgrade to the latest stack from git, use:

Reddit discussion.

Disclaimer 1: Type classes are great but they are not the right tool for every job. Enjoy some balance and balance to your balance.

Disclaimer 2: I should tidy this up but probably won’t.

Disclaimer 3: Yeah called it, better to be realistic.

Type classes are a language of their own, this is an attempt to document features and give a name to them.

Advanced Bash Usage Cheat Sheet

These commands were taking from the talk Introduction to Advanced Bash Usage by James Pannacciulli

Updated 21 Jan 2017 06:54:53

Getting help

High-Performance Matrix Multiplication

This is a short post that explains how to write a high-performance matrix multiplication program on modern processors. In this tutorial I will use a single core of the Skylake-client CPU with AVX2, but the principles in this post also apply to other processors with different instruction sets (such as AVX512).

Intro

Matrix multiplication is a mathematical operation that defines the product of

	;; 1. place this in ~/.emacs.d/private/intero/packages.el

	;; 2. add intero, syntax-checking and auto-completion to your
	;; ~/.spacemacs layer configuration & remove the haskell layer
	;; if you were using that before

	;; 3. make sure you have stack installed http://haskellstack.org

	;; 4. fire up emacs & open up a stack project's source files

	{-# LANGUAGE CPP #-}
	{-# LANGUAGE ScopedTypeVariables #-}
	{-# LANGUAGE FlexibleInstances, FlexibleContexts #-}
	{-# LANGUAGE DataKinds, GADTs, KindSignatures, TypeOperators, UndecidableInstances #-}

	#if __GLASGOW_HASKELL__ < 708
	#error "requires GHC 7.10 or newer"
	#endif
	module Main (main) where

	{-# LANGUAGE Arrows #-}
	{-# LANGUAGE ConstraintKinds #-}
	{-# LANGUAGE FlexibleContexts #-}
	{-# LANGUAGE FlexibleInstances #-}
	{-# LANGUAGE GADTs #-}
	{-# LANGUAGE InstanceSigs #-}
	{-# LANGUAGE LambdaCase #-}
	{-# LANGUAGE MultiParamTypeClasses #-}
	{-# LANGUAGE RankNTypes #-}
	{-# LANGUAGE ScopedTypeVariables #-}

	{-# LANGUAGE OverloadedStrings #-}
	module App where
	import Component
	import Notes
	import Reflex.Dom
	import Data.Semigroup ((<>))

	app :: MonadWidget t m => m ()
	app = do
	add <- (BlankNote <$) <$> button "New Note"

	# https://mail.haskell.org/pipermail/ghc-devs/2017-July/014364.html
	# https://downloads.haskell.org/~ghc/8.2.1-rc3/
	# http://taylor.fausak.me/2017/05/17/testing-ghc-release-candidates-with-stack/
	compiler: ghc-8.2.0.20170704
	compiler-check: match-exact

	resolver: ghc-8.2.0.20170704

	setup-info:
	ghc: