data:{

    list:["a","b","c"] //定义数组

  }

 console.log(“得数组长度”+this.list.length) 

console.log(“得数组下标值”+this.list[1]) 

Cannot read property 'length' of undefined;at "pages/allproduct/allproduct" page lifeCycleMethod onLoad function TypeError: Cannot read property 'length' of undefined

Cannot read property '1' of undefined;at "pages/allproduct/allproduct" page lifeCycleMethod onLoad function TypeError: Cannot read property '1' of undefined