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POHow can object == this, but object.member != this.member in Javascript?
 

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  1. POHow can object == this, but object.member != this.member in Javascript?
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    <p>I have an object, let's call it <code>o</code>, and a reference to <code>o</code>.</p> <p>Within the scope of <code>o</code>, I set a member, let's call it <code>m</code>.</p> <p>So in o, I call:</p> <pre><code>o.m = "blah" </code></pre> <p>Outside of o, I access <code>m</code>:</p> <pre><code>console.log(o.m) </code></pre> <p>Which gives me something that isn't "blah". I did:</p> <pre><code>console.log(this == this.parent.o) </code></pre> <p>which returns true. How is this possible? I'm using Chrome 17.0.963.56 m</p> <p><strong>EDIT</strong></p> <p>Also, I've tried within object <code>o</code>:</p> <pre><code>this.m = "blah" console.log(this.m) // prints "blah" </code></pre> <p>but after exiting that scope and do:</p> <pre><code>console.log(o.m) </code></pre> <p>it prints something different.</p> <p>Relevant code (see this.addEvent("playPauseButtonClicked")):</p> <pre><code> // Controller code (singleton) function controller() { if (window.c) { return window.c; } window.c = this; ... // Event handling this.addEvent = function(eventName, callback) { if (!this.events[eventName]) this.events[eventName] = []; this.events[eventName].push(callback); } this.raiseEvent = function(eventName) { self = getController(); if (self.events[eventName]) { var callbacks = self.events[eventName]; var i = 0; for (i = 0; i&lt;callbacks.length; ++i) { callbacks[i](); } } } this.musicplayer = new zeitgeistPlayer(this, this.songStatus); ... this.addEvent("playPauseButtonClicked", function() { var controller = getController(); var musicplayer = controller.musicplayer; switch (musicplayer.state) { case "paused": musicplayer.resume(); controller.view.setButtonProperty("playPauseButton", "pause", true); break; case "playing": musicplayer.pause(); controller.view.setButtonProperty("playPauseButton", "pause", false); break; case "stopped": controller.playSong(); controller.view.setButtonProperty("playPauseButton", "pause", true); break; } }); if (this.playQueue.length == 0) this.view.setButtonProperty("playPauseButton", "disabled", true); this.raiseEvent("controllerLoaded"); } // Functional classes function basePlayer(songStatus) { this.state = "stopped"; // states are: stopped, playing, paused ... } // implementation of basePlayer using the zeitgeist flash player function zeitgeistPlayer(controller, songStatus) { $.extend(this, new basePlayer(songStatus)); ... this.controller = controller; ... this.pause = function () { if (this.controller.debug) console.log("player pausing"); this.state = "paused"; this.swf.pauseSong(); if (this.controller.debug) console.log("player "+this.state); console.log(this); console.log(getController().musicplayer); console.log(this==getController().musicplayer); } ... } </code></pre>
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    1. PTQuestion
    1. USbrandon
    1. USbrandon
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    1. PO
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    3. PO
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    1. VO
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      1. POHow can object == this, but object.member != this.member in Javascript?
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      1. VTUpMod
    2. VO
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      1. POHow can object == this, but object.member != this.member in Javascript?
      1. This table or related slice is empty.
      1. VTDownMod
    1. COconsole is not realtime
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      1. POHow can object == this, but object.member != this.member in Javascript?
      1. USJoe
    2. COI could give you an answer if your question was phrased better with a realistic test case. In so far, `var a = {a:'h'}, b = {a:'h'}; console.log(a.a==b.a);` returns true to me.
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      1. POHow can object == this, but object.member != this.member in Javascript?
      1. USChristian
    3. COYou have to initialize the variable. `var o = new obj; console.log(o.m);`
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      1. POHow can object == this, but object.member != this.member in Javascript?
      1. USRelic
 

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