var a = b = function( c ){ return c; };//here, you can use a === b because they're pointing to the same memory and they're the same typevar a = function( c ){ return c; }, b = function( c ){ return c; };//here you can use that byte-saver Andy E used (which is implicitly converting the function to it's body's text as a String),''+a == ''+b.//this is the gist of what is happening behind the scences:a.toString( ) == b.toString( )
