czars

//  Created by Vasily Ulianov on 09.02.17, updated in 2019.
//  License: MIT

import Foundation

/// Subclass of `Operation` that adds support of asynchronous operations.
/// 1. Call `super.main()` when override `main` method.
/// 2. When operation is finished or cancelled set `state = .finished` or `finish()`
open class AsynchronousOperation: Operation {
    public override var isAsynchronous: Bool {

czars

extension OperationQueue {
    
    /// Creates a debounced function that delays invoking `action` until after `delay` seconds have elapsed since the last time the debounced function was invoked.
    ///
    /// - Parameters:
    ///   - delay: The number of seconds to delay.
    ///   - underlyingQueue: An optional background queue to run the function
    ///   - action: The function to debounce.
    /// - Returns: Returns the new debounced function.
    open class func debounce(delay: TimeInterval, underlyingQueue: DispatchQueue? = nil, action: @escaping () -> Void) -> (() -> Void) {

czars

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Note: this is a summary of different git workflows putting together to a small git bible. references are in between the text

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How to Branch

try to keep your hacking out of the master and create feature branches. the [feature-branch workflow][4] is a good median between noobs (i have no idea how to branch) and git veterans (let's do some rocket sience with git branches!). everybody get the idea!

Basic usage examples

czars

import Foundation

var token: dispatch_once_t = 0
func test() {
    dispatch_once(&token) {
        println("This is printed only on the first call to test()")
    }
    println("This is printed for each call to test()")
}