method-chaining

问题 I'm trying to get the principles of doing jQuery-style function chaining straight in my head. By this I mean: var e = f1('test').f2().f3(); I have gotten one example to work, while another doesn't. I'll post those below. I always want to learn the first principle fundamentals of how something works so that I can build on top of it. Up to now, I've only had a cursory and loose understanding of how chaining works and I'm running into bugs that I can't troubleshoot intelligently. What I know:

问题 Still on the PHP-OOP training wheels, this question may belong on failblog.org. =) What are the benefits of method chaining in PHP? I'm not sure if this is important, but I'll be calling my method statically. e.g. $foo = Bar::get('sysop')->set('admin')->render(); From what I've read, any method which returns $this is allowed to be chained. I just learned this is new in PHP5. Seems to me there may be speed benefits if I don't have to instantiate a whole new object (calling it statically) and

问题 I want to make a trait which add some property to a class and make it possible to chain methods. Tested in Scala 2.8.1. trait SomeProperty { var prop : String = "default" def setProp(s: String) = { prop = s this } } sealed abstract class Value case class IntegerValue(v: Int) extends Value case class FloatValue(v: Float) extends Value with SomeProperty { def foo() = { println("I'm foo.") } } case object UnknownValue extends Value with SomeProperty { def bar() = { println("I'm bar.") } } scala>

问题 I'd like to implement method chaining in my swift code, likely to Alamofire methods. For example, if I have to use my function like below getListForID(12).Success { // Success block }. Failure { // Failure block } How would I create the function getListForID ? 回答1: To expand on the great points @dasblinkenlight and @Sulthan have made – here's a small example of how you could achieve your request function to take a success and failure closure, in the convenient syntax that you want. First, you

问题 Hi I'm stuck with a problem. I want to implement the builder pattern to make creating my objects easier. The problem I face has to do with nested object. The object I would like to create has a list of other objects in it, and I don't really have an idea on how to tackle it. I want to be able to do the following (Simpler objects for example): Receipt RestaurantReceipt = new ReceiptBuilder() .withDate("value") .withName("value") .AddItem("value") .WithIngredients("value") .WithType("value")

问题 I want to implement method chaining like in those questions: Best practice to implement Scala trait which supports method chaining ; Scala DSL: method chaining with parameterless methods However, I want that once a "property" has been used, it cannot be used anymore. For example lets assume that I have a class "Myclass" for which I want to allow the use of definition "foo" and definition "bar" at most once and I don't care about the final return type. Thus: val c = new Myclass c foo //ok ! c

问题 So I have the following code: // Learn more about F# at http://fsharp.net open System open System.Linq open Microsoft.FSharp.Collections let a = [1; 2; 3; 4; 54; 9] let c = a |> List.map(fun(x) -> x*3) |> List.filter(fun(x) -> x > 10) let d = a.Select(fun(x) -> x*3).Where(fun(x) -> x > 10) for i in c do Console.WriteLine(i) for i in d do Console.WriteLine(i) Both seem to do the same thing, but most F# examples I see use the |> pipe operator, while I'm more used to method chaining (a.l.a. C#

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 6 years ago . So... messing around in JavaScript with an idea that's new to me, having methods of an Object return the Object of which they are

问题 (not to be confused with itertools.chain) I was reading the following: http://en.wikipedia.org/wiki/Method_chaining My question is: what is the best way to implement method chaining in python? Here is my attempt: class chain(): def __init__(self, my_object): self.o = my_object def __getattr__(self, attr): x = getattr(self.o, attr) if hasattr(x, '__call__'): method = x return lambda *args: self if method(*args) is None else method(*args) else: prop = x return prop list_ = chain([1, 2, 3, 0])

问题 I am trying to learn more about Method chaining in Javascript and would like to know the proper way to create a delay with no jQuery to the next function in the chain: var foo = function() { this.delay = function(per) { setTimeout(start, per); return this; }; this.start = function() { alert('start!'); }; }; var bar = new foo().delay(1000).start(); 回答1: This isn't easy to do. jQuery uses a specific queue system. Suppose you want to do it without jQuery, you would have to implement a queue