SirensOfTitan

// swiftlint:disable file_length
fileprivate func compareOptionals<T>(lhs: T?, rhs: T?, compare: (_ lhs: T, _ rhs: T) -> Bool) -> Bool {
    switch (lhs, rhs) {
    case let (lValue?, rValue?):
        return compare(lValue, rValue)
    case (nil, nil):
        return true
    default:
        return false
    }

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

steipete

//
//  SpinlockTestTests.swift
//  SpinlockTestTests
//
//  Created by Peter Steinberger on 04/10/2016.
//  Copyright © 2016 PSPDFKit GmbH. All rights reserved.
//

import XCTest

khanlou

import XCTest


@testable import <#project#>

class StringMD5Test: XCTestCase {
    
    func testMD5() {
        let string = "soroush khanlou"
        XCTAssertEqual(string.md5, "954d741d14b14002d1ba88f600eee635")

zwaldowski

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<!-- iOS 10, macOS Sierra, and friends bring a new logging subsystem that's
supposed to scale from the kernel, up to frameworks, and up to apps. It defaults
to a more regimented, privacy-focused approach that large apps and complex
systems need.

It, along with Activity Tracing introduced in iOS 8 and macOS Yosemite and the
Console app in macOS Sierra, hope to help you graduate from caveman debugging to

zwaldowski

//
//  Activity.swift
//
//  Created by Zachary Waldowski on 8/21/16.
//  Copyright © 2016 Zachary Waldowski. Licensed under MIT.
//

import os.activity

private final class LegacyActivityContext {

gunjanpatel

Revert the full commit

Sometimes you may want to undo a whole commit with all changes. Instead of going through all the changes manually, you can simply tell git to revert a commit, which does not even have to be the last one. Reverting a commit means to create a new commit that undoes all changes that were made in the bad commit. Just like above, the bad commit remains there, but it no longer affects the the current master and any future commits on top of it.

git revert {commit_id}

About History Rewriting

Delete the last commit

Deleting the last commit is the easiest case. Let's say we have a remote origin with branch master that currently points to commit dd61ab32. We want to remove the top commit. Translated to git terminology, we want to force the master branch of the origin remote repository to the parent of dd61ab32:

othiym23

• scope of the project
  • npm CLI vs npm, Inc.
  • the CLI team
  • the npm, Inc. Code of Conduct
• keeping up with the project
  • CHANGELOG.md & release feed
  • weekly team meetings
  • other CLI team meetings
  • effectively using the npm issue tracker
  • #npm on Freenode

staltz

How to show migration guides in GitHub Markdown

Use the diff code highlighting tag.

  ```diff
  - foo
  + bar

Example:

chriseidhof

// This accompanies http://chris.eidhof.nl/posts/repmin-in-swift.html

import UIKit

// Unfortunately, we need Box

public class Box<T> {
    public let unbox: T
    public init(_ value: T) { self.unbox = value }
}