来自数组的RoR free元素

Question

我在数组中有一个元素，

[#<Name id: 23, first_name: "anderson", last_name: "gorge">]

如何删除数组块，以便我想要它

#<Name id: 23, first_name: "anderson", last_name: "gorge">

没有数组块

Answer 1

你的意思是你在一个数组中有一个单个元素，你想要提取它吗？有很多方法可以做到这一点，2很快就会浮现在脑海中：

>> obj = [#<Name id: 23, first_name: "anderson", last_name: "gorge">].first
=> #<Name id: 23, first_name: "anderson", last_name: "gorge">
>> obj = [#<Name id: 23, first_name: "anderson", last_name: "gorge">].shift
=> #<Name id: 23, first_name: "anderson", last_name: "gorge">

Answer 2

irb(main):005:0> arr = ["#"]
irb(main):006:0> elem = arr.first
irb(main):008:0> elem == "#"
=> true