method-chaining

I have a bunch of useful functions that I have collected during my whole life. function one(num){ return num+1; } function two(num){ return num+2; } I can call them with two(two(one(5))) But I would prefer to use (5).one().two().two() How can I achieve this without using prototype? I tried to see how underscore chain works, but their code is too intense to understand it The dot syntax is reserved for objects. So you can do something like function MyNumber(n) { var internal = Number(n); this.one = function() { internal += 1; // here comes the magic that allows chaining: return this; } // this

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 methods; this then leads to chainability. My question, then: how can this be useful? I threw this together to test the fundamental workings: <script> MathChain = function() { this.pass = function() { this.multiply = eval(arguments.join('*')); this.add = eval(arguments.join('+')); return this; } } m = new MathChain().pass(5, 10, 20).multiply; // 1000 a = new MathChain().pass(5, 10, 20).add; // 35 </script> That's obviously not a viciously efficient instance in which

While answering a few questions on here earlier and from some work I have been doing lately I have been wondering why Java does not support method chaining on its built in classes. If I were to create a Car class for example, I could make it chainable by reutrning this instead of void as follows: public class Car { private String make; public Car setMake(String make) { this.make = make; return this; } } Is there any particular reason why the built in libraries don't tend to do things this way? Is there a downside to method chaining? I may have overlooked something which would explain the lack

(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]) print list_.extend([9, 5]).sort().reverse() """ C:\Python27\python.exe C:/Users/Robert/PycharmProjects

I was wondering what would be the best way to implement a .When condition in a fluent interface using method chaining in a Builder object? For instance how would I implement the .WithSkill() and .When() methods in the following example: var level = 5; var ninja = NinjaBuilder .CreateNinja() .Named("Ninja Boy") .AtLevel(level) .WithShurikens(10) .WithSkill(Skill.HideInShadows) .When(level > 3) .Build() Update - A sample solution can be found here . What I'd do is have NinjaBuilder keep the operations as a list of delegates, rather than applying them, and only apply them when .Build is called.

This question already has an answer here: PHP method chaining? 8 answers jQuery lets me chain methods. I also remember seeing the same in PHP so I wrote this: class cat { function meow() { echo "meow!"; } function purr() { echo "purr!"; } } $kitty = new cat; $kitty->meow()->purr(); I cannot get the chain to work. It generates a fatal error right after the meow. Zachary Murray To answer your cat example, your cat's methods need to return $this , which is the current object instance. Then you can chain your methods: class cat { function meow() { echo "meow!"; return $this; } function purr() {

Using method chaining, I am looking to fire a function repeatedly but only after the function has completed. Almost like don't execute until the function has fully run its course. Example of intended result: var myfunc = { copy: function(message){ window.setTimeout(function(){ console.log(message); },1000); return this; } }; myfunc.copy('hello').copy('world'); // wait a second then log: // hello // wait until first function completion (1000ms), wait a second then log: // world Any help is appreciated! MiltoxBeyond If you don't want to use jQuery you can also have it as a pure JS solution. var