ruby - 如何在 ruby​​ 中通过哈希值在哈希数组中进行搜索？

Question

我有一个哈希数组，@fathers。

a_father = { "father" => "Bob", "age" =>  40 }
@fathers << a_father
a_father = { "father" => "David", "age" =>  32 }
@fathers << a_father
a_father = { "father" => "Batman", "age" =>  50 }
@fathers << a_father 

我如何搜索这个数组并返回一个 block 返回 true 的哈希数组？

例如:

@fathers.some_method("age" > 35) #=> array containing the hashes of bob and batman

谢谢。

Answer 1

您正在寻找 Enumerable#select (也称为 find_all):

@fathers.select {|father| father["age"] > 35 }
# => [ { "age" => 40, "father" => "Bob" },
#      { "age" => 50, "father" => "Batman" } ]

根据文档，它“返回一个数组，其中包含 [可枚举的，在本例中为 @fathers] 的所有元素，其中 block 不是假的。”