staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

---

woogist

<?php
/**
 * Apply a different tax rate based on the user role.
 */
function wc_diff_rate_for_user( $tax_class, $product ) {
	if ( is_user_logged_in() && current_user_can( 'administrator' ) ) {
		$tax_class = 'Zero Rate';
	}

	return $tax_class;

amochohan

#Laravel 5 Simple ACL manager

Protect your routes with user roles. Simply add a 'role_id' to the User model, install the roles table and seed if you need some example roles to get going.

If the user has a 'Root' role, then they can perform any actions.

Installation

Simply copy the files across into the appropriate directories, and register the middleware in App\Http\Kernel.php

Delagen

"use strict";
/*use in config.xml <hook type="after_platform_add" src="../path/to/cordova-ios-disable-push.js"/>*/
var fs = require("fs");
var path = require("path");

var COMMENT_KEY = /_comment$/;
function nonComments(obj) {
	var newObj = {};
	Object.keys(obj).forEach(function(key) {
		if (!COMMENT_KEY.test(key)) {

jmatthiesen

"use strict";
/*use in config.xml <hook type="after_platform_add" src="../path/to/cordova-ios-disable-push.js"/>*/
var fs = require("fs");
var path = require("path");

var COMMENT_KEY = /_comment$/;
function nonComments(obj) {
	var newObj = {};
	Object.keys(obj).forEach(function(key) {
		if (!COMMENT_KEY.test(key)) {

skunkworker

# assuming Model is your model and options is a json/jsonb column.
# This uses the Postgres json append || operator.
# And wraps the option inside an array.
# producing [{},{}] multiple hashes inside a top level json array.

# It is very important that the hash is [{}] NOT {} as not having the array on the 
# outside will cause the hash to replace the contents instead of appending to them.

new_option = [{
  name: option_name,

absyah

A memory-saving ActiveRecord setting has been used by just one application ever, according to GitHub
There's a common performance problem in many Rails background jobs.

Background jobs often do operations across large sets of data. Basically, they do silly things like User.all.each(&:send_daily_newsletter).

So, there's a problem with that query. In development and test environments, User.all will probably return a few rows, maybe a dozen at most. Most developers have extremely limited seed data on their local machines.

In production, however, User.all will probably return quite a few rows. Depending on the app you work on, maybe a few hundred thousand.

There's a tiiiiiny issue with a result set that returns 100,000 rows, and it's not just that the SQL query will take a long time to return. It will have irreversible effects on your Ruby app too!

fxn

Ruby: The future of frozen string literals

What is a literal?

In programming languages, literals are textual representations of values in the source code. This is a syntactical concept.

Some examples:

7 # integer literal