console 命令行工具 X clear
console
<!DOCTYPE html>
<html>
    <head>
        <title>Closure Example 2</title>
    </head>
    <body>
        <script type="text/javascript">
        
            function createFunctions(){
                var result = new Array();
                for (var i=0; i < 10; i++){
                    result[i] = function(num){
                        return function(){
                            return num;
                        };
                    }(i);
                }
                return result;
            }
            
            var funcs = createFunctions();
            
            //every function outputs 10
            for (var i=0; i < funcs.length; i++){
                document.write(funcs[i]() + "<br />");
            }

        </script>
     
    </body>
</html>