yzhong52

在Ubuntu操作系统下运行shiny服务器

Basic Command

ls - show the current diretory pwd - show the current folder cd - go to folder nano - edit file cat - show the content of a file mv - move a folder to another location

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Check The Process Using Port

In ~/.zshrc, put the following:

pidportfunction() {
    lsof -n -i4TCP:$1 | grep LISTEN
}
alias pidport=pidportfunction

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// This snippet is a lazy, temporary, inappropriate, not secure fix for error:
// 
// "No 'Access-Control-Allow-Origin' header is present on the requested resource".
//
// It works as a proxy and add 'Access-Control-Allow-Origin: *' to the response header. 
// 
// 1) Init proejct and add dependencies:
// 
// ```
// npm init

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class ViewController: UIViewController {

    private let manager = NewsManager()
    private let disposeBag = DisposeBag()

    private var articles: [Article] = []

    private let titleLabel: UILabel = {
        let label = UILabel()
        label.text = NSLocalizedString("News", comment: "")

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import Foundation
import RxSwift
import RxCocoa

class NewsManager {
    typealias NewsLoadState = LoadState<ArticlesResponse>

    enum LoadError: Error {
        case unknownError
    }

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import Foundation

enum LoadState<T> {
    case loading
    case updating
    case loaded(response: T)
    case failed(error: Error)
}

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extension ViewController: UITableViewDataSource {
    ...

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let tableViewCell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! NewsTableViewCell

        let article = articles[indexPath.row]
        tableViewCell.titleLabel.text = article.title
        tableViewCell.contentLabel.text = article.content

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import UIKit
import Alamofire

class ImageManager {

    private let session = Alamofire.Session()
    
    static let shared = ImageManager()

    func load(url: URLConvertible, completionHandler: @escaping (UIImage) -> Void) -> Void {

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import UIKit

class NewsTableViewCell: UITableViewCell {

    let titleLabel: UILabel = {
        let lable = UILabel()
        lable.translatesAutoresizingMaskIntoConstraints = false
        lable.numberOfLines = 3
        lable.font = UIFont.systemFont(ofSize: 14)
        return lable

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import UIKit
import RxSwift

class ViewController: UIViewController {
    private let disposeBag = DisposeBag()
    private let client = NewsClient()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        client.headlines().subscribe(onSuccess: { (response) in