javascript - JavaScript 中的空指针异常

Question

var Obj = {

    StateValues: ['AL','AK','AL','AK','AZ','AR','CA','CO','CT','DE','FL','GA','HI','ID','IL','IN','IA',
    'KS','KY','LA','ME','MD','MA','MI','MN','MS','MO','MT','NE','NV','NH','NJ','NM','NY','NC','ND',
    'OH','OK','OR','PA','RI','SC','SD','TN','TX','UT','VT','VA','WA','WV','WI','WY'],

    getItemRow: function(itemValue) {
     var myPosition=-1
       for (var i=0;i<Obj.StateValues.length;i++) {
          if(Obj.StateValues[i]==itemValue) {
            myPosition = i;
             break;
         }
      }
      return myPosition;
    }
}

当我在代码中添加该函数时，我得到空指针期望。这段代码位于一个 sep 文件中...somename.js，我将其包含在内

我什至没有在其他 js 文件中的任何地方使用此函数...例如 Obj.getItemRow()

Answer 1

var Obj = new function(){

     var StateValues = ['AL','AK','AL','AK','AZ','AR','CA','CO','CT','DE','FL','GA','HI','ID','IL','IN','IA',
    'KS','KY','LA','ME','MD','MA','MI','MN','MS','MO','MT','NE','NV','NH','NJ','NM','NY','NC','ND',
    'OH','OK','OR','PA','RI','SC','SD','TN','TX','UT','VT','VA','WA','WV','WI','WY'];

    this.getItemRow = function(itemValue) {
     var myPosition=-1
       for (var i=0;i<StateValues.length;i++) {
          if(StateValues[i]==itemValue) {
            myPosition = i;
             break;
         }
      }
      return myPosition;
    };
}

这是创建对象的一种更简单的方法。

var blah = '这是私有(private)的'
this.blah = '这是公开的'