我有一系列形式的哈希：
[{"status"=>"Unshipped", "city"=>"thane", "buyer_name"=>"abc", "name"=>"abc def", "countryCode"=>"IN", "payment_method"=>"COD", "order_type"=>"StandardOrder", "y_id"=>"r123", "phone"=>"12345", "state"=>"Maharashtra", "service"=>"Expedited", "address_1"=>"abc xyz", "address_2"=>"yyyy", "postalCode"=>"400607", "shipped_by_y"=>"false", "channel"=>"MFN", "amout"=>"350.00"}, {"status"=>"Unshipped", "city"=>"Chembur, Mumbai", "buyer_name"=>"xyz", "name"=>"xyz lmn", "countryCode"=>"IN", "payment_method"=>"Other", "order_type"=>"StandardOrder", "y_id"=>"r124", "phone"=>"12436", "state"=>"Maharashtra", "service"=>"Expedited", "address_1"=>"add 1", "address_2"=>"add 2", "postalCode"=>"400071", "shipped_by_y"=>"false", "channel"=>"MFN", "amout"=>"399.00"}]
从这个数组中我想选择为键y_id赋值的元素。
例如。如果我想获得'y_id' = 'r124'的元素，我应该得到：
{"status"=>"Unshipped", "city"=>"Chembur, Mumbai", "buyer_name"=>"xyz", "name"=>"xyz lmn", "countryCode"=>"IN", "payment_method"=>"Other", "order_type"=>"StandardOrder", "y_id"=>"r124", "phone"=>"12436", "state"=>"Maharashtra", "service"=>"Expedited", "address_1"=>"add 1", "address_2"=>"add 2", "postalCode"=>"400071", "shipped_by_y"=>"false", "channel"=>"MFN", "amout"=>"399.00"}
答案 0 :(得分：5)
您应该使用find API。它返回与您查找的内容匹配的第一个元素，如果没有找到，则返回nil：
arr.find { |element| element['y_id'] == 'r124' }
将返回：
{"status"=>"Unshipped", "city"=>"Chembur, Mumbai", "buyer_name"=>"xyz", "name"=>"xyz lmn", "countryCode"=>"IN", "payment_method"=>"Other", "order_type"=>"StandardOrder", "y_id"=>"r124", "phone"=>"12436", "state"=>"Maharashtra", "service"=>"Expedited", "address_1"=>"add 1", "address_2"=>"add 2", "postalCode"=>"400071", "shipped_by_y"=>"false", "channel"=>"MFN", "amout"=>"399.00"}
答案 1 :(得分：2)
你应该可以使用
arr.find { |i| i['y_id] == *value* }
将迭代您的哈希数组，其中i是任何给定的哈希值。 Select将返回一个对象数组，其中块将解析为true。
因此，例如，如果您将r123作为值传递，则会返回
{"status"=>"Unshipped", "city"=>"thane", "buyer_name"=>"abc", "name"=>"abc def", "countryCode"=>"IN", "payment_method"=>"COD", "order_type"=>"StandardOrder", "y_id"=>"r123", "phone"=>"12345", "state"=>"Maharashtra", "service"=>"Expedited", "address_1"=>"abc xyz", "address_2"=>"yyyy", "postalCode"=>"400607", "shipped_by_y"=>"false", "channel"=>"MFN", "amout"=>"350.00"}
获取哈希值。 （谢谢@BroiSatse）