airspeedswift

enum Color {
    case Red, Black
}

class Tree<T: Comparable> {
    let value: T
    let left: Tree<T>?
    let right: Tree<T>?
    let color: Color

Azoy

Install Swift on Ubuntu

Requirements

1. Ubuntu 14.04, 16.04, or 16.10

Step 1 - Dependencies

1. Open up terminal
2. Install core deps: sudo apt-get install clang libicu-dev git

Step 1.1 - Ubuntu 14.04 Clang

lattner

Swift Concurrency Manifesto

Author: Chris Lattner

Chinese Translation by Jason Yu

Contents

• Introduction
• Overall Vision

tclementdev

libdispatch efficiency tips

The libdispatch is one of the most misused API due to the way it was presented to us when it was introduced and for many years after that, and due to the confusing documentation and API. This page is a compilation of important things to know if you're going to use this library. Many references are available at the end of this document pointing to comments from Apple's very own libdispatch maintainer (Pierre Habouzit).

My take-aways are:

• You should create very few, long-lived, well-defined queues. These queues should be seen as execution contexts in your program (gui, background work, ...) that benefit from executing in parallel. An important thing to note is that if these queues are all active at once, you will get as many threads running. In most apps, you probably do not need to create more than 3 or 4 queues.

• Go serial first, and as you find performance bottle necks, measure why, and if concurrency helps, apply with care, always validating under system pressure. Reuse

jefftriplett

"""
To install:
    # python requirements
    $ pip install click selenium

    # for headless chrome
    $ brew install chromedriver

To use:
    $ python capture.py https://revsys.com revsys.png