==========test.js==========

1 //安全检测JavaScript基本数据类型和内置对象 2 //参数：o表示检测的值 3 /*返回值：返回字符串"undefined"、"number"、"boolean"、 4 "string"、"function"、"regexp"、"array"、"date"、 5 "error"、"object"或"null" 6 */ 7 function typeOf(o){ 8     var _toString = Object.prototype.toString; 9     //获取对象的toString()方法引用10     //列举基本数据类型和内置对象类型，可以进一步补充该数组的检测数据类型范围11     var _type = {12         "undefined":"undefined",13         "number":"number",14         "boolean":"boolean",15         "string":"string",16         "[object Function]":"function",17         "[object RegExp]":"regexp",18         "[object Array]":"array",19         "[object Date]":"date",20         "[object Error]":"error"21     }22     return _type[typeof o]||_type[_toString.call(o)]||(o?"object":"null");23 }