staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

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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.

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ryanchang

LLDB Cheat Sheet

A complete gdb to lldb command map.

Print out

• Print object

(lldb) po responseObject
(lldb) po [responseObject objectForKey@"state"]

• p - Print primitive type

mikebranski

/**
 * This Google Sheets script keeps data in the specified column sorted any time
 * the data changes.
 *
 * After much research, there wasn't an easy way to automatically keep a column
 * sorted in Google Sheets, and creating a second sheet to act as a "view" to
 * my primary one in order to achieve that was not an option. Instead, I
 * created a script that watches for when a cell is edited and triggers
 * an auto sort.
 *

lattner

Async/Await for Swift

• Proposal: SE-XXXX
• Authors: Chris Lattner, Joe Groff

Introduction

Modern Cocoa development involves a lot of asynchronous programming using closures and completion handlers, but these APIs are hard to use. This gets particularly problematic when many asynchronous operations are used, error handling is required, or control flow between asynchronous calls gets complicated. This proposal describes a language extension to make this a lot more natural and less error prone.

This paper introduces a first class Coroutine model to Swift. Functions can opt into to being async, allowing the programmer to compose complex logic involving asynchronous operations, leaving the compiler in charge of producing the necessary closures and state machines to implement that logic.

isaacsanders

This is a post by Joel Spolsky. The original post is linked at the bottom.

This is such a common question here and elsewhere that I will attempt to write the world's most canonical answer to this question. Hopefully in the future when someone on answers.onstartups asks how to split up the ownership of their new company, you can simply point to this answer.

The most important principle: Fairness, and the perception of fairness, is much more valuable than owning a large stake. Almost everything that can go wrong in a startup will go wrong, and one of the biggest things that can go wrong is huge, angry, shouting matches between the founders as to who worked harder, who owns more, whose idea was it anyway, etc. That is why I would always rather split a new company 50-50 with a friend than insist on owning 60% because "it was my idea," or because "I was more experienced" or anything else. Why? Because if I split the company 60-40, the company is going to fail when we argue ourselves to death. And if you ju

antfarm

class CRC32 {
        
    static var table: [UInt32] = {
        (0...255).map { i -> UInt32 in
            (0..<8).reduce(UInt32(i), { c, _ in
                (c % 2 == 0) ? (c >> 1) : (0xEDB88320 ^ (c >> 1))
            })
        }
    }()

steipete

//
// PSPDFThreadSafeMutableDictionary.m
//
// Copyright (c) 2013 Peter Steinberger, PSPDFKit GmbH. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is

orta

preble

import Cocoa

@objc
class SomeTextStorage: NSTextStorage {
    
    private var storage: NSMutableAttributedString
    
    override init() {
        storage = NSMutableAttributedString(string: "", attributes: nil)
        super.init()

zeusdeux

Vanilla websockets vs socket.io

Note: The points below are a comparison of using vanilla websockets on client and server and using 'em via socket.io and not about why only use socket.io

• Native websockets provide us with only a send method to send data to the server. Send accepts only string input (not too sure about this). Socket.io lets us emit arbitrary events with arbitrary data (even binary blobs) to the server.
• To receive messages on a vanilla websocket you can only assign a handler for the message event. The data you receive is mostly likely to be text (again not too sure about this) and you will have to parse it manually before consuming it. Socket.io lets the server and client both emit arbitrary events and handles all the parsing and packing/unpacking.
• Socket.io gives us both a server and a client. Implementing a vanilla websocket server isn't something that you would want to do per project since it's quite painful. You will have to implement [RFC6455](https://tools.ietf.org/h