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POJavascript, passing a function in an object literal and is it callable?
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  1. POJavascript, passing a function in an object literal and is it callable?
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    copied!<p>always in the process of learning Javascript and modifying a cool <a href="http://www.devbridge.com/projects/autocomplete/#download" rel="nofollow noreferrer">autocomplete library</a>, i am now in front of this :</p> <p>i need to check if something passed in an object literal is a variable/field (that is to be considered as a simple value) or is something that can be called.</p> <p>(as MY autocomplete depend on many input fields, i need to "value" the right things, just before the Ajax.Request) so that this declaration (see the 'extra' parts...)</p> <pre><code> myAutoComplete = new Autocomplete('query', { serviceUrl:'autoComplete.rails', minChars:3, maxHeight:400, width:300, deferRequestBy:100, // callback function: onSelect: function(value, data){ alert('You selected: ' + value + ', ' + data); } // the lines below are the extra part that i add to the library // an optional parameter, that will handle others arguments to pass // if needed, these must be value-ed just before the Ajax Request... , extraParametersForAjaxRequest : { myExtraID : function() { return document.getElementById('myExtraID').value; } } </code></pre> <p>see the "1 // here i'm lost..." below, and instead of 1 => i would like to check, if extraParametersForAjaxRequest[x] is callable or not, and call it if so, keeping only its value if not. So that, i get the right value of my other inputs... while keeping a really generic approach and clean modification of this library...</p> <pre><code>{ var ajaxOptions = { parameters: { query: this.currentValue , }, onComplete: this.processResponse.bind(this), method: 'get' }; if (this.options.hasOwnProperty('extraParametersForAjaxRequest')) { for (var x in this.options.extraParametersForAjaxRequest) { ajaxOptions.parameters[x] = 1 // here i'm lost... } } new Ajax.Request(this.serviceUrl, ajaxOptions ); </code></pre>
 

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