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In this tutorial we're going to build a set of parser combinators.

What is a parser combinator?

We'll answer the above question in 2 steps

  1. what is a parser?
  2. and.. what is a parser combinator?

So first question: What is parser?

#![feature(inclusive_range_syntax, generators, generator_trait, never_type)]
use std::ops::{Generator, GeneratorState};
fn is_div_by(n: u64, modulus: u64) -> bool {
if n % modulus == 0 {
} else {
Qix- /
Last active Jun 14, 2019
SHA256 in (mostly) pure Bash script
#!/usr/bin/env bash
# Released into the Public Domain.
# Original implementation in C by Brad Conte ( <>
# Ported to Bash (lol) by Josh Junon ( <>
# Yes, it's absolutely as slow as it looks.
# The only external dependency it has is on a utility called `od`,
milsosa / test.js
Last active Jul 23, 2019
Run Mocha Tests
View test.js
'use strict';
// 1. Create the file: {projectRoot}/test.js
// 2. Install dependencies: npm i glob why-is-node-running
// 3. Run the tests: node --expose-internals test.js
const whyIsNodeRunning = require('why-is-node-running');
const glob = require('glob');
const Mocha = require('mocha');
toastal / Main.elm
Created Dec 6, 2016
Elm URL Parsing Playaround
View Main.elm
module Main exposing (..)
{-| elm-package install elm-lang/navigation evancz/url-parser
import Html exposing (Html, caption, div, table, tbody, td, text, th, thead, tr)
import Navigation exposing (Location)
import String
import UrlParser exposing (Parser, (</>), map, oneOf, s, int, string, top, parseHash)
jasongilman /
Last active Jan 17, 2021
This describes how I setup Atom for Clojure Development.

Atom Clojure Setup

This describes how I setup Atom for an ideal Clojure development workflow. This fixes indentation on newlines, handles parentheses, etc. The keybinding settings for enter (in keymap.cson) are important to get proper newlines with indentation at the right level. There are other helpers in and keymap.cson that are useful for cutting, copying, pasting, deleting, and indenting Lisp expressions.

Install Atom

Download Atom

The Atom documentation is excellent. It's highly worth reading the flight manual.


Here's how you validate a mailgun webhook in Node.js (as per the mailgun docs for securing webhooks)

'use strict';

var scmp = require('scmp')
  , crypto = require('crypto')
  . mailgunPrivateKey = 'XXXXXXXXXXXXX'
  , mailgunTokens = {}
  , mailgunExpirey = 15 * 60 * 1000
substack / test.js
Created Mar 15, 2014
setup and teardown in tape
View test.js
var test = require('tape');
test('setup', function (t) {
// ...
// tests go here
test('teardown', function (t) {
branneman /
Last active Mar 6, 2021
Better local require() paths for Node.js

Better local require() paths for Node.js


When the directory structure of your Node.js application (not library!) has some depth, you end up with a lot of annoying relative paths in your require calls like:

const Article = require('../../../../app/models/article');

Those suck for maintenance and they're ugly.

Possible solutions

View pg-session.js
var oneDay = 86400;
module.exports = function (connect) {
var Store = connect.session.Store
, PGStore;
PGStore = function (options) {
var self = this;