3. Object.defineProperty does not work

Object.defineProperty does not work 


  • // Source.js
Memory.sources = Memory.sources || {};
Object.defineProperty(Source.prototype, 'memory', {
    enumerable : true,
    configurable : false,
    get: function () {
        return Memory.sources[this.id];
    },
    set: function (value) {
        Memory.sources[this.id] = value;
    }
});

    but on:

    source.memory.test = 1;

    I have an error. What is wrong?


  • Easy, you don't have the object defined @ source.memory yet:
    try source.memory = {test:1};
    then modify your getter, so it would initialise Memory.sources[this.id] to {};


  • No! You wrong! Just try it and you understand me


  • I mean that Source.prototype.memory is exists but property memory at object is absent


  • Memory has been set
    Code


  • What you really want is 

    
        Memory.sources = Memory.sources || {};
        Object.defineProperty(Source.prototype, 'memory', {
            enumerable : true,
            configurable : false,
            get: function () {
                Memory.sources[this.id] = Memory.sources[this.id] || {};
                return Memory.sources[this.id];
            }
        });
        var tstRoom = _.first(_.values(Game.rooms));
        var idx = 0;
        _.forEach(tstRoom.find(FIND_SOURCES), function(o){
            o.memory.idx = "I am " + idx++ + "th source";
        })

    result


  • This is strange, but this is work now for me without changes...
    Thank you!


  • You're welcome; Do define a setter as well, if you wish to be able to replace the whole object @ the memory index for the given source.