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

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

/**
 * Globals
 */
var Carrousel = function(elem) { this.init() };
Carrousel.prototype = { init: function() {} };
new Carrousel();

/**
 * Namespacing
 *  - No globals (only the namespace variable itself is global)

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

Visual Studio Code: My setup (macOS)

Global settings

git clone git@github.com:branneman/dotfiles.git ~/.dotfiles
ln -s ~/.dotfiles/vscode-settings.json "~/Library/Application Support/Code/User/settings.json"

Run from terminal

• Open the Command Palette (⌘ + ⇧ + P)

branneman

#!/usr/bin/env node

'use strict';

var spawn = require('child_process').spawn;

var args = [
  '--harmony',
  'app/bootstrap.js'
];

branneman

/**
 * @param {Event} evt
 * @return {Object}
 */
function getMousePosition(evt) {

  var pageX = evt.pageX;
  var pageY = evt.pageY;
  if (pageX === undefined) {
    pageX = evt.clientX + document.body.scrollLeft + document.documentElement.scrollLeft;

branneman

function dump($var) {
    ob_start();
    var_dump($var);
    $output = ob_get_clean();
    echo preg_replace("/=>(\s+)/m", ' => ', $output);
}

branneman

$(function() {
    var resizeEnd;
    $(window).on('resize', function() {
        clearTimeout(resizeEnd);
        resizeEnd = setTimeout(function() {
            $(window).trigger('resize-end');
        }, 100);
    });
});

branneman

const crypto = require('crypto')
const { promisify } = require('util')
const pbkdf2 = promisify(crypto.pbkdf2)

module.exports = { createHashPasswordFn, isPasswordCorrect }

/**
 * @typedef {Object} HashPassword
 * @property {String} hash
 * @property {String} salt