benjamingr

let once = (fns, called) => // fns is an array of functions, called is undefined if first call
  fns.map(orig => function OnceBinded(){
    if(called) return; else called = true;
    return orig(...arguments);
  });
export class Promise {
  constructor(resolver){
    Object.assign(this, {_handlers: [] , _state : State.Pending, _value: null});
    resolver(value => {
      if(this._state !== State.Pending) return;

benjamingr

Possibly Unhandled Rejection NodeJS Promise Hook

###Unhandled Rejection Tracking

Several promise libraries such as bluebird and when as well as some native promise implementations offer potentially unhandled rejection tracking. This means that the following:

Promise.reject(new Error("err")); // never attach a `catch`

benjamingr

//
//  Promise.swift
//  Promise
//
//  Created by Benjamin Gruenbaum on 8/12/14.
//  Copyright (c) 2014 Tipranks. All rights reserved.
//

import Foundation

benjamingr

//
//  Promise.swift
//  Promise
//
//  Created by Benjamin Gruenbaum on 8/12/14.
//  Copyright (c) 2014 Tipranks. All rights reserved.
//

import Foundation

benjamingr

    func then<NT,NE>(onFulfilled:(T) -> Promise<NT,NE>) -> Promise<NT,NE> {
        var p =  Promise<NT,NE>()
        switch self.state.state {
        case .Rejected:
            p.reject(self.state.error) // this is a type error
        case .Fulfilled:
            let result = onFulfilled(self.state.value!)
            result.then( { p.fulfill($0) })
            result.catch( {p.reject($0) })
        case .Pending:

benjamingr

//
//  Promise.swift
//  Promise
//
//  Created by Benjamin Gruenbaum on 8/12/14.
//  Copyright (c) 2014 Tipranks. All rights reserved.
//

import Foundation

benjamingr

//
//  Promise.swift
//  Promise
//
//  Created by Benjamin Gruenbaum on 8/12/14.
//  Copyright (c) 2014 Tipranks. All rights reserved.
//

import Foundation

benjamingr

class Foo<A,B>{
    var bar:[(A,B)] = [(A,B)]() // why is this invalid?
}

benjamingr

// this will load a script, I assume each dependency contains what it needs inside 
// `dependency.needs` and we'll load that. 
//
//  stuff is called script here, but it could also be a stylesheet or whatever. 
//
// Since when we return a promise from a `.then` it unwraps and runs the promise we return, we can
// return a promise for the values of our _own_ dependencies, and continue doing so, promises will 
// unwrap everything for us.
//
// This does not do have the same `.addDependency` interface from before, it's just a function to show

benjamingr

function ResourceBuilder(){
    this._dependencies = [];
}

ResourceBuilder.prototype.addDependency = function(dep){
    this._dependencies.add(dep);
}
ResourceBuilder.protototype.get = function(){
     var loadPromises = this._dependencies.map(loadDependency); // alternatively, dependencies could be promises already
     return Promise.all(loadPromises).then(function(loadedResourcesArray){