jsvascript判斷數據類型

1. 代碼：

   function getType(val){
   this.val = val
   this.isInt = function(val){
       if((typeof(val)=='number')||(val instanceof Number)){
           if(/^\d*$/.test(val)){
               return true
           }else{
               return false
           }
       }else{
           return false
       }
   }
   this.isFloat = function(val){
       if((typeof(val)=='number')||(val instanceof Number)){
           if(/^\d*\.\d*$/.test(val)){
               return true
           }else{
               return false
           }
       }else{
           return false
       }
   }
   this.isString = function(val){
       if((typeof(val)=='string')||(val instanceof String)){
           return true
       }else{
           return false
       }
   }
   this.isBoolean = function(val){
       if((typeof(val)=='boolean')||(val instanceof Boolean)){
           return true
       }else{
           return false
       }
   }
   this.isArray = function(val){
       if(val instanceof Array){
           return true
       }else{
           return false
       }
   }
   this.isObject = function(val){
       if(val instanceof Object && typeof val.length == 'undefined'){
           return true
       }else{
           return false
       }
   }
   this.dump = function(){
       var val = this.val
       var isint = this.isInt(val)
       var isfloat = this.isFloat(val)
       var isstring = this.isString(val)
       var isbool = this.isBoolean(val)
       var isarray = this.isArray(val)
       var isobject = this.isObject(val)
       if(isint){
           return 'int'
       }else if(isfloat){
           return 'float'
       }else if(isstring){
           return 'string'
       }else if(isbool){
           return 'boolean'
       }else if(isarray){
           return 'array'
       }else if(isobject){
           return 'object'
       }
   }
   }
   var a = new getType(1)
   var aa = a.dump()
   var b = new getType(1.1)
   var bb = b.dump()
   var c = new getType('hello')
   var cc = c.dump()
   var d = new getType(true)
   var dd = d.dump()
   var e = new getType([1,2])
   var ee = e.dump()
   var f = new getType({name:'lee'})
   var ff = f.dump()
   console.log(aa)
   console.log(bb)
   console.log(cc)
   console.log(dd)
   console.log(ee)
   console.log(ff)

2. 輸出：

   int
   float
   string
   boolean
   array
   object