用不同的密钥构造一个新的哈希

Question

hash = { 
  "key1_sub1" => [0, 1, 2], 
  "key2_sub2" => [1, 12], 
  "key3_sub1" => [4, 5, 6] 
}

是否有一个班轮会给我一个新的哈希

它找到与原始哈希中的键模式“_sub1”匹配的哈希值，通过删除“_sub1”来构造新键

new_hash = { "key1" => [0, 1, 2], "key3" => [4, 5, 6] }

Answer 1

hash.each_with_object({}){|(k, v), h| h[k.sub(/_sub1/, '')] = v if k[/_sub1/]}

Answer 2

这应该有效：

new_hash = Hash[*hash.keys.map{ |x| x.gusb /_sub\d$/, '' }.zip(hash.values)]