jquery core: improves #3248. Functions are supported by isFunction.
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@ -1137,7 +1137,7 @@ jQuery.extend({
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if( array != null ){
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var i = array.length;
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// The window, strings (and functions) also have 'length'
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if( i == null || typeof array == 'string' || array.setInterval )
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if( i == null || typeof array == 'string' || jQuery.isFunction(array) || array.setInterval )
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ret[0] = array;
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else
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while( i )
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