mathiasverraes

<?php declare(strict_types=1);
// @mathiasverraes
// parser is a function that takes some input and returns (either (structured value AND remainder) OR error)
// parser is a function that takes some input and returns  a Result

$a = function ($input) {
    $parsed = substr($input, 0, 1);
    $remainder = substr($input, 1);
    if ($parsed === 'a') return succeed($parsed, $remainder); else return fail("expected a");
};

mathiasverraes

My kid 11yo has a blood phobia. I asked Twitter for suggestions for action/adventure/scifi/fantasy/comedy movies that are suitable for a 9 and 11 yo who like Star Wars and Back to the Future.

Below are the movies people have suggested. They often did so from memory, and I haven't validated if they are indeed suitable. However, I learned about this site where you can lookup if a moview has blood or other phobia-inducing content: https://www.doesthedogdie.com/

Has no blood

mathiasverraes

<?php declare(strict_types=1);
/*
 * This file is part of the Parsica library.
 *
 * Copyright (c) 2020 Mathias Verraes <mathias@verraes.net>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

mathiasverraes

https://twitter.com/janellekz/status/1183805720225107976?s=20

Well I know Simon's ideas on the matter, that's why I was asking for yours. I haven't given it enough thought to have strong opinions but here's a quick attempt:

Similar: Models and maps both consists of abstractions. The abstractions are chosen, for a purpose, in a context.

Different: Models are conceptual. Models are not just tools for understanding, they are understanding. I can draw or code or somehow express a model, but it's only a representation of an underlying model, not the model itself.

Landscapes and maps are physical. The symbols on the map are linked to things in the landscape. You don't visualize a map, the visualisation is the map.

mathiasverraes

<?php
// Context: I'm trying to argue that DI (and DIC) are great, and DIC libs suck. 
// Happy to be proven wrong!

final class Router {
    private $dependencies;
    public function __construct (Dependencies $dependencies) {
        $this->dependencies = $dependencies;
        // You might say that this is Service Locator, but it's not. This router is toplevel,
        // and toplevel must have access to dependencies. After that it can all just bubble nicely using proper DI.

mathiasverraes

*
!.gitignore

mathiasverraes

Step 0:

Get Homebrew installed on your mac if you don't already have it

Step 1:

Install highlight. "brew install highlight". (This brings down Lua and Boost as well)

Step 2:

mathiasverraes

<?php
foreach (fib() as $x) echo "$x\n";

function fib () {
  yield 0; yield 1;
  $f = fib(); $g = fib(); 
  $g->next();
  while (true) {
    yield $f->current() + $g->current();
    $f->next(); $g->next();

mathiasverraes

<?php declare(strict_types=1);

// In reaction to @marcoshuttle's http://marcosh.github.io/post/2017/06/16/maybe-in-php.html
// Warning: none of this code has been tested or even run.

namespace Verraes\Maybe;


interface Just extends Maybe {
    // We can only extract if we know it's  a Just

mathiasverraes

<?php declare(strict_types = 1);

function volume (array $levels) {
    return array_sum(
        zipWith(
            'subtract',
            zipWith(
                'min',
                scanl('max', $levels),
                scanr('max', $levels)