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

<?php
/**
 * Case in-sensitive array_search() with partial matches
 *
 * @param string $needle   The string to search for.
 * @param array  $haystack The array to search in.
 *
 * @author Bran van der Meer <branmovic@gmail.com>
 * @since 29-01-2010
 */

branneman

//
// SVG — hasClass, addClass, removeClass, toggleClass
//  Source:
//   https://gist.github.com/branneman/8436956
//  Taken and adapted from:
//   http://toddmotto.com/hacking-svg-traversing-with-ease-addclass-removeclass-toggleclass-functions/
//

if (SVGElement && SVGElement.prototype) {

branneman

// FP Lenses
const lens = get => set => ({ get, set });
const view = lens => obj => lens.get(obj);
const set = lens => val => obj => lens.set(val)(obj);
const over = lens => fn => obj => set(lens)(fn(view(lens)(obj)))(obj);
const lensProp = key => lens(prop(key))(assoc(key));

branneman

(ns main (:gen-class))

;; Snake :: [[int int]…]
;;  vector of x,y tuples
;;  head is first, tail is last

;; out-of-bounds? :: (int int int) -> bool
;;  grid-size is 1-indexed, x+y are 0-indexed
(defn out-of-bounds? [grid-size x y]
  (or (neg? x) (neg? y) (>= x grid-size) (>= y grid-size)))

branneman

List of all Clojure Predicate functions

A predicate function returns a boolean true or false, and it's name ends with a ?. Ran against Clojure 1.10.0.

({:ns clojure.string,
  :predicates
  ({:fn ends-with?, :arglists ([s substr])}
   {:fn starts-with?, :arglists ([s substr])}
   {:fn includes?, :arglists ([s substr])}

branneman

const stat = require('fs').statSync;
const AdmZip = require('adm-zip');

/**
 * Example usage
 */
newArchive(`test-${+new Date}.zip`, [
    'index.js',
    'package.json',
    'node_modules'

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

const { curryN, curry } = require('./curry') // https://gist.github.com/branneman/4ffb7ec3fc4a2091849ba5d56742960c

// Array higher-order
const map = curry((fn, list) => list.map(fn))
const filter = curry((fn, list) => list.filter(fn))
const foldl = curry((fn, init, list) => list.reduce(fn, init))
const foldr = curry((fn, init, list) => list.reduceRight(fn, init))
const find = curry((fn, list) => list.find(fn))
const sort = curry((fn, list) => list.slice().sort(fn))
const includes = curry((fn, list) => list.includes(fn))