DavidKuennen

(function (context, trackingId, options) {
    const history = context.history;
    const doc = document;
    const nav = navigator || {};
    const storage = localStorage;
    const encode = encodeURIComponent;
    const pushState = history.pushState;
    const typeException = 'exception';
    const generateId = () => Math.random().toString(36);
    const getId = () => {

rauschma

This content moved here: https://exploringjs.com/impatient-js/ch_arrays.html#quickref-arrays

mrmartineau

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

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));

Kartones

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

• -E: will describe the underlaying queries of the \ commands (cool for learning!)
• -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

smebberson

node_modules
*.swp

chaosprinz

require './trivial_file_upload_service.rb'
require 'rack/test'
require 'rspec'

set :enviroment, :test

end

peterc

#           NAME: authinabox
#        VERSION: 1.01 (Dec 27, 2008)
#         AUTHOR: Peter Cooper [ http://www.rubyinside.com/ github:peterc twitter:peterc ]
#    DESCRIPTION: An "all in one" Sinatra library containing a User model and authentication
#                 system for both session-based logins OR HTTP Basic auth (for APIs, etc).
#                 This is an "all in one" system so you will probably need to heavily tailor
#                 it to your own ideas, but it will work "out of the box" as-is.
#  COMPATIBILITY: - Tested on 0.3.2 AND the latest rtomayko Hoboken build! (recommended for the latter though)
#                 - NEEDS DataMapper!
#                 - Less work needed if you use initializer library -- http://gist.github.com/40238