我怎样才能从“年龄”中获得价值?我已经有了“record.data.items”,但我无法再进一步了。我想要年龄的价值。谁能帮我?
`Ext.util.MixedCollection
...
items: Array[3]
0: c
data: Object
age: "4"
id: "1"
name: "sam"
1: c
2: c
length: 3
__proto__: Array[0]
keys: Array[3]
length: 3
...`