Deletes all empty keys from an Object

Clean Object

/*
* Clean Object
* Cleans object from keys are not being used
* @param {Object} dirty
* @returns {Object} clean
*/
function cleanObject(object) {
    var keys = Object.keys(object);
    keys.map(function(obj, i) {
        var value = object[obj];
        var arr_check = (value instanceof Array);
        if (!value) {
          delete object[obj];
        }
        if(arr_check){
          if(value.length === 0){
            delete object[obj];   
          }
        }
        else if(value instanceof Object){
            cleanObject(value);
        }
        else if(typeof value === 'string'){
            if(value==="NA" 
              || value==="n/a" 
              || value==="Null" 
              || value==="null" 
              || value==="N/A"){
                delete object[obj];
            }
        }
    });
    return object;
}