eventemitter

I am trying to implement an EventEmitter/Subscriber relationship between two components in a react native class. I have seen referenced the following materials: React Native - Event Emitters by Colin Ramsay React Native - Call Function of child from NavigatorIOS These solutions are adequate for what I am trying to accomplish, however, they bother require the use of mixins: [Subscribable.Mixin] on the receiving component to work properly with Subscriber . Unfortunately, I am using ES6 and extending my classes from Component so I can not use this mixin syntax. My question is: How can I implement

My user should be able to move (or rotate) an object by mouse in a canvas. When mouse events occur the screen coordinates are used to calculate the delta (direction and length) to the last event. Nothing special... mousedown (get the first coordinate) mousemove (get nth coordinate, calculate deltaXY, move object by deltaXY) mouseup (same as step 2 and stop the mousemove and mouseup event handling) After this chain of events it should be possible to repeat the same action. This outdated example works as expected, after removing the toRx calls. But here the delta to the first coordinate is

I have an error when trying to inherit EvenEmitter /* Consumer.js */ var EventEmitter = require('events').EventEmitter; var util = require('util'); var Consumer = function() {}; Consumer.prototype = { // ... functions ... findById: function(id) { this.emit('done', this); } }; util.inherits(Consumer, EventEmitter); module.exports = Consumer; /* index.js */ var consumer = new Consumer(); consumer.on('done', function(result) { console.log(result); }).findById("50ac3d1281abba5454000001"); /* ERROR CODE */ {"code":"InternalError","message":"Object [object Object] has no method 'findById'"} I've

I have searched and searched for this, to no avail. I've combed the web (including Stackoverflow), and the Node docs for an answer, and not found one---that worked (maybe that's just bad searching on my part). I'm working with an event-stream in a gulp config file, and I have a particular task that is hitting the classic "memory leak detected" error from the EventEmitter class. From what I've found, the answer to dealing with this issue seems to be to call the setMaxListeners method of the EventEmitter class; and my research has suggested that the event-stream has a Stream object, which should

I'm currently teaching myself Angular2 and I have a practical problem that would be easy to rectify in AngularJS but currently I'm looking through examples to find a solution with Angular2. Anyway, I have a top level component called App and within that component I have a property that applies a css class, here is my HTML that is used as the component template - you can see where I wish to apply the css class using ngClass . The showMenu value is just a boolean. <div class="navigation" role="navigation"> <ul> <li><a [routerLink]="['Home]">Home</a></li> <li><a [routerLink]="['Mail']">Mail</a><