Thomas vlrmprjct

While attempting to explain JavaScript's reduce method on arrays, conceptually, I came up with the following - hopefully it's helpful; happy to tweak it if anyone has suggestions.

Intro

JavaScript Arrays have lots of built in methods on their prototype. Some of them mutate - ie, they change the underlying array in-place. Luckily, most of them do not - they instead return an entirely distinct array. Since arrays are conceptually a contiguous list of items, it helps code clarity and maintainability a lot to be able to operate on them in a "functional" way. (I'll also insist on referring to an array as a "list" - although in some languages, List is a native data type, in JS and this post, I'm referring to the concept. Everywhere I use the word "list" you can assume I'm talking about a JS Array) This means, to perform a single operation on the list as a whole ("atomically"), and to return a new list - thus making it much simpler to think about both the old list and the new one, what they contain, and

	#!/bin/bash
	#

	# Display usage info
	vhost-usage() {
	cat <<"USAGE"

	Usage: vhost [OPTIONS] <name>
	-h\|--help this screen
	-pub to create the webhost root in ~/www/name/public/

	<VirtualHost template.url:80>

	ServerAdmin template.email
	ServerName template.url
	DocumentRoot template.webroot

	<Directory "template.webroot" >
	Options Indexes FollowSymLinks MultiViews
	AllowOverride All
	Order allow,deny

	/**
	* Given a source directory and a target filename, return the relative
	* file path from source to target.
	* @param source {String} directory path to start from for traversal
	* @param target {String} directory path and filename to seek from source
	* @return Relative path (e.g. "../../style.css") as {String}
	*/
	function getRelativePath(source, target) {
	var sep = (source.indexOf("/") !== -1) ? "/" : "\\",
	targetArr = target.split(sep),

	// Add / Update a key-value pair in the URL query parameters
	function updateUrlParameter(uri, key, value) {
	// remove the hash part before operating on the uri
	var i = uri.indexOf('#');
	var hash = i === -1 ? '' : uri.substr(i);
	uri = i === -1 ? uri : uri.substr(0, i);

	var re = new RegExp("([?&])" + key + "=.*?(&\|$)", "i");
	var separator = uri.indexOf('?') !== -1 ? "&" : "?";
	if (uri.match(re)) {

	[user]
	name = Pavan Kumar Sunkara
	email = [email protected]
	username = pksunkara
	[core]
	editor = vim
	whitespace = fix,-indent-with-non-tab,trailing-space,cr-at-eol
	excludesfile = ~/.gitignore
	[sendemail]
	smtpencryption = tls

	<!doctype html>
	<html><head><script src="app.js"></script></head><body></body></html>

	@echo off
	REM Make sure that the path to the script is correct!
	@bash -l -c "~/bin/gitkraken-wsl-bash.sh %*"

	'use strict';

	const autoprefixer = require('autoprefixer');
	const path = require('path');
	const webpack = require('webpack');
	const HtmlWebpackPlugin = require('html-webpack-plugin');
	const CaseSensitivePathsPlugin = require('case-sensitive-paths-webpack-plugin');
	const InterpolateHtmlPlugin = require('react-dev-utils/InterpolateHtmlPlugin');
	const WatchMissingNodeModulesPlugin = require('react-dev-utils/WatchMissingNodeModulesPlugin');
	const eslintFormatter = require('react-dev-utils/eslintFormatter');