ruby数组包含一个id

Question

我目前想迭代一个对象数组（2个属性：id＆amp; name）并检查数组是否包含特定的Id

我该怎么做？

Answer 1

Enumerable#detect没问题，但我认为Enumerable#any?（返回一个布尔值）严格按照你的要求：

xs = [{:id => 1, :name => 'a'}, {:id => 2, :name => 'b'}]
puts xs.any? {|x| x[:id] == 1} # true
puts xs.any? {|x| x[:id] == 5} # false

Answer 2

尝试detect

a = [{:id => 1, :name => 'a'}, {:id => 2, :name => 'b'}]
puts a.detect {|x| x[:id] == 1}