Stefano futtetennista

I hereby claim:

To claim this, I am signing this object:

Book

Introduction to Functional Programming by Bird and Wadler (referred as ITFP)
My solutions to (some) of the exercises in the book implemented in Haskell (PRs and comments are welcome!)

In ghci:

	#!/usr/bin/env bash

	set -euo pipefail

	# Handy script to make it easier to import books in different formats into Calibre using Add books > Add from folders and sub-folders.

	function main {
	local -r folder="${1?Missing directory}"

	if [ ! -d "$folder" ]; then

	trait Semigroup[T]:
	def mappend(x: T, y: T): T

	trait Monoid[T] extends Semigroup[T]:
	def empty: T

	object Semigroup:
	given sumIntSemigroup: Semigroup[Int] with
	override def mappend(x: Int, y: Int): Int = x + y

	#!/usr/bin/env bash

	set -euox pipefail

	# Go to https://read.amazon.com/notebook and export your highlights as JSON using https://readwise.io/bookcision
	#
	# Install http://ankiweb.net/ and the https://foosoft.net/projects/anki-connect/index.html extension. Create a simple front-only card in anki, e.g.
	# Card template: {{Front}}
	# Styling:
	# .card {

	#!/usr/bin/env stack
	-- stack script --resolver lts-9.14 --package free
	{-# LANGUAGE GADTs, DeriveFunctor #-}

	type CartItem =
	String


	type CreditCard =
	String

	/*
	* Copyright (C) 2013 Google, 2014 Stefano Dacchille
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software

	public class CustomUncaughtExceptionHandlerProxy implements Thread.UncaughtExceptionHandler {

	private static CustomUncaughtExceptionHandlerProxy proxy;

	private final boolean enabled;

	private Thread.UncaughtExceptionHandler customUncaughtExceptionHandler;

	private CustomUncaughtExceptionHandlerProxy(CustomApplication application) {
	enabled = !application.inDevMode();

	@Override
	public boolean onIgnitedLocationChanged(Location location) {
	return locationManager.onNewLocation(this, location, lastSearchedLocation);
	}

	private class EndlessOnPageChangeListener implements OnPageChangeListener {
	private static final int NO_PAGE = -1;
	int loadingPage = NO_PAGE;

	@Override
	public void onPageSelected(int currentPage) {
	// we're not on the loading element
	if (loadingPage != currentPage) {
	loadingPage = NO_PAGE;
	currentAdapter.setLoadingData(false);