dastrobu

struct MyStruct {
    var n: Int
    
    func sayHello() {
        print("hello")
    }
}

var s: MyStruct = MyStruct(n: 1)
var a: [UInt8] = []

SergLam

import UIKit

extension UITableView {

    func isCellVisible(section: Int, row: Int) -> Bool {
        guard let indexes = self.indexPathsForVisibleRows else {
            return false
        }
        return indexes.contains{ $0.section == section && $0.row == row }
    }

illescasDaniel

import Foundation

@propertyWrapper
public struct Validate<Value> {
	
	fileprivate let _isValid: (Value) -> Bool
	
	public let asserts: Bool
	public let useLastValid: Bool
	public let message: (Value) -> String

JagoWang

Mac Port 基本用法总结 

1. Mac Port的下载地址 
http://www.macports.org/install.php 

2. Mac Port的说明文档 
http://guide.macports.org/ 

3. Mac Port中第三方软件下载包存放的默认路径是：/opt/local/var/macports/distfiles/ 
为了提高安装速度，可以在安装新port时直接将此目录下的文件拷贝到新的Mac Port相同的目录中就可以避免Port去网上下载。