branneman

Better local require() paths for Node.js

Problem

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

branneman

Primitive Types & Reference Types in JavaScript

An explanation of JavaScript's pass-by-value, which is unlike pass-by-reference from other languages.

Facts

• JavaScript has 2 kinds of variable types: primitive and reference.
• A fixed amount of memory is reserved after creation of every variable.
• When a variable is copied, it's in-memory value is copied.
• Passing a variable to a function via a call also creates a copy of that variable.

Primitive Types

branneman

def application(environ, start_response):
    import sys
    path = 'YOUR_WWW_ROOT_DIRECTORY'
    if path not in sys.path:
        sys.path.append(path)
    from pyinfo import pyinfo
    output = pyinfo()
    start_response('200 OK', [('Content-type', 'text/html')])
    return [output]

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{
  // Tight coupling from A to B  => A needs B to be defined, callable and adhere to an interface
  // No coupling from B to A     => B does not need A in any way (pure fn)
  function a() {
    b()
  }
  function b() {}
}

{

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// Interface of a primitive variable: its name and type
const DEFAULT_DB_HOST = 'localhost'

// Interface of a container variable: its name, types and structures
const config = {
  user: 'readuser',
  pass: '******',
  db: 'test-env',
}

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// blob = file contents, identified by hash
const blobs = {
  '73d8a': 'import x from "y"; console.log("some file contents")',
  '9c6bd': 'D8 A1 31 0F ...',
  '547d4': '# Readme\nThis is documentation',
  'a0302': '# Readme\nThis is some updated documentation',
}
 
// tree = references to blobs and trees, identified by hash
const trees = {

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/**
 * Returns a list of numbers from `min` (inclusive) to `max` (exclusive).
 */
const range = (min, max, acc = []) => {
  if (max < min) throw new Error('not supported!')
  if (min >= max) return acc
  return range(min + 1, max, acc.concat(min))
}

/**

branneman

Hogget: Philosophy

Elevator pitch

• Functional programming language
• Strong typed
• Dense syntax, everything is an expression
• Compiles to JavaScript

The Name

A Hogget is a sheep between one and two years of age. Inspired by Ramda, we also like sheep.

branneman

<?php
class Struct
{
    /**
     * Define a new struct object, a blueprint object with only empty properties.
     */
    public static function factory()
    {
        $struct = new self;
        foreach (func_get_args() as $value) {

branneman

'use strict';

const whitelist = {
    '/static/img/photo.jpg': '/static/img/photo.webp'
};

exports.handler = (event, context, callback) => {

    // Grab HTTP request and it's headers
    const request = event.Records[0].cf.request;