Ruby on rails 如何访问数组中的实例变量？

我有一个gem，它的输出具有以下数组（调用

rate.inspect

）

---

建议？

您在

rate

中拥有的对象实际上是一个

数组

，包含一个元素，即一个

Fedex:：rate

对象。可通过消息识别的：

undefined method `total_net_charge' for #<Array:0x007f955408caf0>

---

太好了<代码>费率。首先。总净费用已完成。谢谢

undefined method `total_net_charge' for #<Array:0x007f955408caf0>

undefined method `total_net_charge' for #<Array:0x007f955408caf0>

rate.first.total_net_charge

# Or by index
rate[0].total_net_charge

# Or assuming the array will sometimes have multiple objects
# loop or map to get them all
rate.each {|r| puts r.total_net_charge}

# or by map as an array of just the charges
rate.map(&:total_net_charge)