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GitHub search for “weak self”: https://github.com/search?l=Swift&p=1&q=%22weak+self%22&type=Code	
Page 1	
Result 1	guard else return
Result 2	guard else return
Result 3	invalid search result
Result 4	if let
Result 5	if let
Result 6	self?.
Result 7	self?.
Result 8	guard else return

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import Foundation

struct EvolutionProposal: Codable {
    
    var id: String
    var title: String
    var reviewStartDate: Date
    var reviewEndDate: Date
    
    enum CodingKeys: String, CodingKey {

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Map Sorting

• Proposal: SE-NNNN
• Authors: Anthony Latsis, Cal Stephens
• Review Manager: TBD
• Status: Awaiting Review
• Implementation: apple/swift#23156

Introduction

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//
//  DateFormatterHelpers.swift
//  WindowKit
//
//  Created by Cal Stephens on 1/20/19.
//  Copyright © 2019 Cal Stephens. All rights reserved.
//

import Foundation

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// MARK: Collection + Sort Imprvements

extension Collection {
    
    // an equivalent set of mutating `sort(by:)` methods would also be made available.
  
    func sorted<T: Comparable>(by value: (Element) throws -> T) rethrows -> [Element] {
        return try self.sorted(by: { lhs, rhs in
            return (try value(lhs)) < (try value(rhs))

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import QuartzCore


// MARK: Extensions

extension Sequence {
    
    func sorted<T: Comparable>(by value: (Element) -> T) -> [Self.Element] {
        return self.sorted(by: { lhs, rhs in

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public struct SortDescriptor<Element> {
    
    private let keyPath: PartialKeyPath<Element>
    private let comparator: (Any, Any) -> ComparisonResult
    
    // For abitrary `Value` types, the consumer has to provide the entire Comparator
    public init<Value>(
        _ keyPath: KeyPath<Element, Value>,
        using comparator: @escaping (Value, Value) -> ComparisonResult)
    {

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import Foundation


// MARK: SortDescriptor

/// Type-erased Sort Descriptor (can store multiple in the same array
/// regardless of the underlying KeyPath
public struct SortDescriptor<Element> {
    
    private let comparator: (Any, Any) -> Bool

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	\begin{tikzpicture}[auto, node distance=2cm, every loop/.style={},
                    thick,main node/.style={circle,draw,font=\sffamily\large\bfseries},graph node/.style={}]
                    
		\node[main node] (1) {$v_1$};
		\node[main node] (2) [below left of=1] {$v_2$};
		\node[main node] (3) [below right of=1] {$v_3$};
		\node[main node] (4) [below left of=3] {$v_4$};
		\node[main node] (5) [below left of=4] {$v_5$};
		\node[main node] (6) [below right of=4] {$v_6$};
		\node[main node] (7) [below right of=5] {$v_7$};

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@IBDesignable
class CornerRadiusView : UIView {
    
    @IBInspectable var cornerRadius: CGFloat = -1
    
    override func draw(_ rect: CGRect) {
        self.layer.cornerRadius = cornerRadius
    }
    
}