javascript - 使用属性获取数组的长度

Question

所以，我有这个带有属性的数组，我想得到它的长度。在这种情况下，数组长度应为 2，因为只有 2 个“项目”

 {"items":[{"value":"2","valor":0,"name":"Limpeza"},
 {"value":"6","valor":0,"name":"TECREMOVE"}]}

我已经尝试过exist.length，但它返回undefined。我怎样才能得到它的长度？

Answer 1

var myObj = {"items":[{"value":"2","valor":0,"name":"Limpeza"},
    {"value":"6","valor":0,"name":"TECREMOVE"}]};

var arrLength = myObj.items.length;

myObj.items- 是数组，myObj.items.length- 该数组的长度。

Answer 2

您有一个名称为2object的属性。itemsarray

尝试：

var data =  {"items":[{"value":"2","valor":0,"name":"Limpeza"},
 {"value":"6","valor":0,"name":"TECREMOVE"}]};

var len = data.items.length;