can-define-stream

undefined

The can-define-stream module doesn't export anything. Instead it changes can-define to support the stream behavior and can-define/map/map and can-define/list/list to have a stream method that's a shorthand for toStream.

require("can-define-stream");
var DefineMap = require("can-define/map/map");

var Person = DefineMap.extend({
    first: "string",
    last: "string"
    get fullName() {
        return this.first + " " + this.last;
    },
    fullNameChangeCount: {
        stream: function(setStream) {
            return this.stream(".fullName").scan(function(last){
                return last + 1;
            },0)
        }
    }
});

var me = new Person({first: "Justin", last: "Meyer"});

me.on("fullNameChangeCount", function(ev, newVal){
    console.log(newVal);
});

me.fullNameChangeCount //-> 0

me.first = "Obaid"
//-> console.logs 1

me.last = "Ahmed"
//-> console.logs 2