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Steven Shaw steshaw

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Loves programming languages
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@dorchard
dorchard / CBNLambdaEff.hs
Last active November 15, 2018 20:40
A Haskell implementation of the categorical semantics for the effectful CBN lambda calculus
{-# LANGUAGE GADTs, TypeFamilies, EmptyDataDecls #-}
{-
A Haskell-based implementation of the monadic semantics for the
simply-typed Call-By-Name computational lambda calculus, following
Moggi's 'Computational lambda-calculus and monads' (1989) (technical report version)
but for the typed calculus (rather than untyped as in this paper).
Category theory seminar, Programming Languages and Systems group,
@steshaw
steshaw / javascript-fe-frameworks.md
Last active January 7, 2018 11:17
JavaScript frontend frameworks
@eckyputrady
eckyputrady / Pseudo.hs
Last active April 2, 2023 12:07
Haskell Clean Architecture
-----------------------------
-- Domain.hs
type SessionId = Text
type UserId = Text
type User = Text
class (Monad m) => UserRepo m where
getUserById :: UserId -> m User
@pesterhazy
pesterhazy / ripgrep-in-emacs.md
Last active July 19, 2024 16:05
Using ripgrep in Emacs using helm-ag (Spacemacs)

Why

Ripgrep is a fast search tool like grep. It's mostly a drop-in replacement for ag, also know as the Silver Searcher.

helm-ag is a fantastic package for Emacs that allows you to display search results in a buffer. You can also jump to locations of matches. Despite the name, helm-ag works with ripgrep (rg) as well as with ag.

How

@robinp
robinp / ghc-api-reuse.md
Last active April 2, 2018 10:42
Calling GHC API multiple times: choose your ExitFailure

GHC API lets you process Haskell sources, and (among other) specify code generation and linking level. For example:

  • (1) no codegen & no link
  • (2) bytecode generation & link in memory
  • (3) machine code generation & linking output binaries

For code analysis purposes, based on generating the typechecked AST, option (1) suffices most of the time. There are some situations in which it doesn't:

  • TemplateHaskell (TH) splice needs to execute code (at compile time) from an imported module: the imported module must be available in compiled form, so either (2) or (3) is needed. Example: in $([|$(foo)|]), foo will be evaluated at compile-time.
  • Code uses FFI imports. For this one would expect that (2) is needed (see checkCOrAsmOrLlvmOrInterp in TcForeign.hs), but actually unless it is used (say by TH, see below), even (1) works too (see the wrapper checkCg).
@jhwheeler
jhwheeler / language-learning-techniques.md
Last active October 21, 2025 07:19
Efficient and effective language learning techniques: Shadowing, Scriptorium, and Side-by-Side Reading.

Language Learning Techniques

Some of the techniques I've used to learn languages quickly and thoroughly:

  1. Shadowing

  2. Scriptorium

  3. Side-by-Side Reading

@mgoellnitz
mgoellnitz / snip.sh
Last active September 27, 2025 02:40
GitLab Snippet Command Line Tool
#!/bin/bash
#
# Copyright 2016-2021 Martin Goellnitz
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
@freckletonj
freckletonj / oauth.hs
Created April 27, 2017 21:06
Haskell Servant OAuth2.0 for GitHub
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE TypeOperators #-}
module Sand where
import Data.Aeson