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Byobu is a suite of enhancements to tmux, as a command line
tool providing live system status, dynamic window management,
and some convenient keybindings:

  F1                             * Used by X11 *
    Shift-F1                     Display this help
  F2                             Create a new window
    Shift-F2                     Create a horizontal split
    Ctrl-F2                      Create a vertical split
    Ctrl-Shift-F2                Create a new session

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protocol KeyPathUpdatable {}

extension KeyPathUpdatable {
    func updating<LeafType>(_ keyPath: WritableKeyPath<Self, LeafType>, to value: LeafType) -> Self {
        var copy = self
        copy[keyPath: keyPath] = value
        return copy
    }
}

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// The SwiftUI Lab
// Website: https://swiftui-lab.com
// Article: https://swiftui-lab.com/alignment-guides

import SwiftUI

class Model: ObservableObject {
    @Published var minimumContainer = true
    @Published var extendedTouchBar = false
    @Published var twoPhases = true

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//
//  UIView+Tooltips.h
//  Crossword
//
//  Created by Steven Troughton-Smith on 13/09/2019.
//  Copyright © 2019 Steven Troughton-Smith. All rights reserved.
//

#import <UIKit/UIKit.h>

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import Foundation

class MyService: NSObject, MyServiceProtocol {
    func upperCaseString(_ string: String, withReply reply: @escaping (String) -> Void) {
        let response = string.uppercased()
        reply(response)
    }
}

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Introduction

• C-a == Ctrl-a
• M-a == Alt-a

General

:q        close
:w        write/saves
:wa[!]    write/save all windows [force]
:wq       write/save and close

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Mac web developer apps

This gist's comment stream is a collection of webdev apps for OS X. Feel free to add links to apps you like, just make sure you add some context to what it does — either from the creator's website or your own thoughts.

— Erik

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extension Sequence {
    func groupSort(ascending: Bool = true, byDate dateKey: (Iterator.Element) -> Date) -> [[Iterator.Element]] {
        var categories: [[Iterator.Element]] = []
        for element in self {
            let key = dateKey(element)
            guard let dayIndex = categories.index(where: { $0.contains(where: { Calendar.current.isDate(dateKey($0), inSameDayAs: key) }) }) else {
                guard let nextIndex = categories.index(where: { $0.contains(where: { dateKey($0).compare(key) == (ascending ? .orderedDescending : .orderedAscending) }) }) else {
                    categories.append([element])
                    continue
                }

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import XCTest

class NotificationTestCase: XCTestCase {

    func testTriggerNotification() {
        expectation(forNotification: .fooBar,
                    object: nil,
                    handler: nil)

        let notificationCenter = NotificationCenter.default

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Byobu Commands
==============

        byobu                              Screen manager


Level 0 Commands (Quick Start)
------------------------------

        <F2>                               Create a new window