修正一下，兼容testData内arr1和arr2可能为字符串的情况

function arraysSimilar(arr1, arr2){            
    var arr1 = typeof arr1 == 'string' ? arr1.split(',') : arr1;            
    var arr2 = typeof arr2 == 'string' ? arr2.split(',') : arr2;            
    if(arr1.length != arr2.length) return false;            
    function processData(arr){                
        var _arr = [];                
        for(var i = 0; i < arr.length; i++){                    
            _arr.push(Object.prototype.toString.call(arr[i]));                
        }                
        return _arr.sort().join(',');            
    }                       
    return processData(arr1) === processData(arr2);        
}