Ruby:按值查找散列中的项目

Question

我目前正在处理类似于以下内容的ruby哈希:

{"employee"=>[{"name"=>"john", "level"=>"1", "position"=>"S1"}, 
              {"name"=>"bill", "level"=>"2", "position"=>"S2"}]}

这是员工的两个例子,我需要能够通过价值观将员工拉出来.例如,我想让所有级别== 2的员工,或者所有员工的职位== S1.

我将如何在Ruby中执行此操作？

Answer 1

使用Hash#select或Array#select.

level_2_employees = infoHash["employee"].select {|k| k["level"] == "2"}

这将根据您的条件返回一系列员工信息哈希值.请务必在关键值附近加上引号

Answer 2

ehash = {"employee"=>[{"name"=>"john", "level"=>"1", "position"=>"S1"}, 
                      {"name"=>"bill", "level"=>"2", "position"=>"S2"}]}
ehash['employee'].find_all { |e| e['level'] == 2}
ehash['employee'].find_all { |e| e['position'] == 'S2'}