從給定的子價值

Question

陣列選擇我有一個數組，看起來像這樣：

arr = ["value1", "value2 spot", "value3", "value4", "value5 spot", "value6"] 

，我想選擇與哪些有spot子所有的值返回數組。

arr.select{|v| v == regex_here} 

我該如何做到這一點？

Answer 1

你可以使用你做

arr.group_by { |item| item.match(/spot/) != nil } 
=> {false=>["value1", "value3", "value4", "value6"], true=>["value2 spot", "value5 spot"]} 

Answer 2

grep方法

arr.grep(/spot/) 
    => ["value2 spot", "value5 spot"] 

其他請求您可以使用

arr.select{ |i| i[/spot/] } 
=> ["value2 spot", "value5 spot"]