I have got an array of hashes, for example:
我有一系列哈希，例如：
[{"id" => "1", "name" => "Name 1"},
{"id" => "2", "name" => "Name 2"},
{"id" => "3", "name" => "Name 3"}]
I would like to get the value of the key "name" for each hash, similar to this:
我想为每个哈希获取密钥“name”的值，类似于：
["Name 1", "Name 2", "Name 3"]
I looked around for quite a while but couldn't find the answer I was looking for.
我环顾了一会儿，却找不到我想要的答案。
1 个解决方案
#1
1
It's simplest to use Enumerable#map for this purpose:
为此目的使用Enumerable #map是最简单的：
array = [{"id" => "1", "name" => "Name 1"}, {"id" => "2", "name" => "Name 2"}, {"id" => "3", "name" => "Name 3"}]
array.map { |hash| hash['name'] }
# => ["Name 1", "Name 2", "Name 3"]
#1
1
It's simplest to use Enumerable#map for this purpose:
为此目的使用Enumerable #map是最简单的：
array = [{"id" => "1", "name" => "Name 1"}, {"id" => "2", "name" => "Name 2"}, {"id" => "3", "name" => "Name 3"}]
array.map { |hash| hash['name'] }
# => ["Name 1", "Name 2", "Name 3"]