hallettj

// This is a test to get a better understanding of Go's scheduling.
// The hypothesis is that if the goroutine worker pool is saturated with
// long-running tasks, then a goroutine that is queued later will not be
// scheduled until the long-running tasks complete.
//
// Tested in Go 1.7 using this command:
//
//     go build -gcflags '-N -l' blocker.go && ./blocker
//
// The `gcflags` setting is my attempt to disable inlining, to give

hallettj

# Makefile for transpiling with Babel in a Node app, or in a client- or
# server-side shared library.

.PHONY: all clean

# Install `babel-cli` in a project to get the transpiler.
babel := node_modules/.bin/babel

# Identify modules to be transpiled by recursively searching the `src/`
# directory.

hallettj

/* @flow */

// Helper function for matching against an ADT.
export function match<A,B>(matcher: A): (match: (matcher: A) => B) => B {
  return match => match(matcher)
}

hallettj

#!/bin/bash
WIRED_ONSITE="eth0"
WIFI_ONSITE="onsite_ssid"
VPN_ONSITE="vpn-onsite"
VPN_OFFSITE="vpn-offsite"

function online {
  nmcli con show --active | grep -qs "^$1"
  return $?
}

hallettj

/*
 * `match` is a helper function for writing pattern matches on types that are
 * implemented using Scott encoding.
 *
 * @flow
 */

export function match<A,B>(matcher: A): (match: (matcher: A) => B) => B {
  return match => match(matcher)
}

hallettj

import Data.List (groupBy, sort, sortOn, transpose)

type Vector = [Double]
type Matrix = [Vector]  -- two-dimensional matrix


{- Distance functions -}

-- type for a distance function
type Distance = Vector -> Vector -> Double

hallettj

This is a patch that adds Electron support to the Redux TodoMVC example app.

The original app is found at: https://github.com/rackt/redux/tree/master/examples/todomvc

After changes are applied, the app can be run in Electron with the commands:

npm install && node_modules/.bin/webpack && npm run electron

hallettj

var execFile    = require('child_process').execFile;
var flow        = require('flow-bin');
var gulp        = require('gulp');
var path        = require('path')
var util        = require('gulp-util');
var webpack     = require('webpack');
var gulpWebpack = require('gulp-webpack');
var _           = require('lodash');

gulp.task('build', ['flow:check'], function() {

hallettj

Quickstart

Get a development environment and project scaffold set up in a jiffy.

Development environment

First install node and npm. There are instructions here:

hallettj

/* @flow */

type Tree<T> =
  | { type: "Node", value: T, left: Tree<T>, right: Tree<T> }
  | { type: "EmptyTree" }

function find<T>(p: (v: T) => boolean, t: Tree<T>): T | void {
  var l, v

  if (t.type === "Node") {