StackOverflow2013

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19983499
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2013-11-14T16:49:22.173
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2013-11-14T18:00:03.317
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<h1>Perhaps you code is not well designed?</h1> I do not see how that would be an issue. The asynchronous process should be responsible for creating a new <code>Deferred</code> object everytime. <pre><code>function doSomething() { var d = $.Deferred(); setTimeout(function () { d.resolve(); }, 1000); return d; } function doSomethingElse() { var d = $.Deferred(); setTimeout(function () { d.resolve(); }, 1000); return d; } </code></pre> Then you can always do the following: <pre><code>$.when(doSomething(), doSomethingElse()).done(function () { console.log('done'); }); </code></pre> <h1>There's always a solution:</h1> If you absolutely need to be able to call <code>resolve</code> multiple times on the same <code>Deferred</code>, then you should wrap the <code>Deferred</code> into another object, let's say <code>DeferredWrapper</code>, which would expose the same API as a <code>Deferred</code> but would delegate all method calls to the it's encapsulated <code>Deferred</code>. In addition of delegating the function calls, the <code>DeferredWrapper</code> would have to keep track of all listening operations (e.g. done, always, fail...) that were made on the object. The <code>DeferredWrapper</code> could store all actions as [functionName, arguments] tuples in an internal <code>this._actions</code> property. Finally, you would need to provide a special implementation for state changing operations (e.g. reject, resolve, resolveWith...etc) that would look like: <ol> <li>Let d be the internal <code>Deferred</code> referenced by <code>this._deferred</code>.</li> <li>Let fn be the function name of the function being called.</li> <li>If <code>d.state()</code> is not pending: 3.1 Do <code>d = this._deferred = [[native jQuery Deferred]]</code> 3.2 Apply all actions on <code>d</code>.</li> <li>Return the result of <code>d[fn].apply(d, arguments)</code></li> </ol> Note: You would also need to implement a custom <code>promise</code> implementation and make sure it behaves correctly. You can probably use a similar approach like the one described.
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1. POReuse Deferred more than once
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1. COBut using this way, you are just executing the method doSomething() & doSomethingElse() direclty no ? See my sample code on jsfiddle please.
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