P.Type vs. P.Protocol There are two kinds of protocol metatypes. For some protocol P, and a conforming type C: A P.Protocol describes the type of a protocol itself (the only value it can hold is P.self). A P.Type describes a concrete type that conforms to the protocol. It can hold a value of C.self, but … Read more
TCP is a connection oriented stream over an IP network. It guarantees that all sent packets will reach the destination in the correct order. This imply the use of acknowledgement packets sent back to the sender, and automatic retransmission, causing additional delays and a general less efficient transmission than UDP. UDP is a connection-less protocol. … Read more
The inclusion of the “http:” or “https:” part is partly just a matter of tradition, partly a matter of actually specifying the protocol. If it is defaulted, the protocol of the current page is used; e.g., //www.example.com becomes http://www.example.com or https://www.example.com depending on the URL of the referring page. If a web page is saved … Read more
Create a custom URLConnection implementation which performs the job in connect() method. public class CustomURLConnection extends URLConnection { protected CustomURLConnection(URL url) { super(url); } @Override public void connect() throws IOException { // Do your job here. As of now it merely prints “Connected!”. System.out.println(“Connected!”); } } Don’t forget to override and implement other methods like … Read more
Data URIs cannot be used for navigation, for scripting, or to populate frame or iframe elements in IE. According to http://msdn.microsoft.com/en-us/library/cc848897%28v=vs.85%29.aspx: Data URIs are supported only for the following elements and/or attributes. object (images only) img input type=image link CSS declarations that accept a URL, such as background, backgroundImage, and so on. Data URIs can … Read more
This is just how protocols currently dispatch methods. A protocol witness table (see this WWDC talk for more info) is used in order to dynamically dispatch to implementations of protocol requirements upon being called on a protocol-typed instance. All it is, is really just a listing of the function implementations to call for each requirement … Read more
Pragma is the HTTP/1.0 implementation and cache-control is the HTTP/1.1 implementation of the same concept. They both are meant to prevent the client from caching the response. Older clients may not support HTTP/1.1 which is why that header is still in use.
What is Delegation? First of all, you should know that Delegation Pattern is not exclusive for iOS world: In software engineering, the delegation pattern is a design pattern in object-oriented programming that allows object composition to achieve the same code reuse as inheritance. But working with delegation in the iOS world is so common, I … Read more
const full = location.protocol + ‘//’ + location.host;
This would be a very, very hacky way to do this… but would this work? Put the link in as normal… But attach an onclick handler to it, that sets a timer and adds an onblur handler for the window (in theory) if the browser handles the link (application X) will load stealing the focus … Read more