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POHow can I pass a reference to a function, with parameters?
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copied!<blockquote> <p><strong>Possible Duplicate:</strong><br> <a href="https://stackoverflow.com/questions/321113/how-can-i-pre-set-arguments-in-javascript-function-call-partial-function-appli">How can I pre-set arguments in JavaScript function call? (Partial Function Application)</a> </p> </blockquote> <p>I need to able to <strong>pass a reference to a function with a given set of parameters</strong>.</p> <p>Here is an example of passing a reference <strong><em>without</strong> parameters</em>:</p> <pre><code>var f = function () { //Some logic here... }; var fr = f; //Here I am passing a reference to function 'f', without parameters fr(); //the 'f' function is invoked, without parameters </code></pre> <p>Now what I need to do is pass the same <code>f</code> function, but this time I would need to pass parameters to the reference. Now, I can do it with an anonymous function and invoke the <code>f</code> function with parameters inside the newly created function, like such:</p> <pre><code>var f = function () { //Some logic here... }; var fr = function (pars) { f(pars); }; //Here I am creating an anonymous function, and invoking f inside it fr({p : 'a parameter'}); //Invoking the fr function, that will later invoke the f function with parameters </code></pre> <p>But my question is, <strong>Is there a way to pass a direct reference to the <code>f</code> function With parameters to <code>fr</code>, but without enclosing it in an anonymous function?</strong></p> <p><em>What do I need to assign to <code>fr</code> to make it invokable without parameters (<code>fr()</code>), so that f(1,2,3) is executed when <code>fr</code> is invoked?</em> </p> <p><strong>[UPDATE]</strong> I followed <a href="https://stackoverflow.com/questions/373157/javascript-passing-a-reference-to-a-function-with-parameters#373216">Jason Bunting</a>'s answer to <a href="https://stackoverflow.com/questions/321113">here</a> about the <em>Partial Function</em> and the JavaScript function he posts there is exactly what I was looking for. Here is the solution:</p> <pre><code>function partial(func /*, 0..n args */) { var args = Array.prototype.slice.call(arguments).splice(1); return function() { var allArguments = args.concat(Array.prototype.slice.call(arguments)); return func.apply(this, allArguments); }; } </code></pre>

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