如何比較兩個哈希中的元素

Question

我想比較兩個哈希以確定哪些值可以匹配。例如：

hash1 = { 
    "hash1_key_a" => 1, 
    "hash1_key_b" => 2 
} 

hash2 = { 
    "hash2_key_a" => 1, 
    "hash2_key_b" => 3, 
    "hash2_key_c" => 4 
} 

# The method here should display the matching keys & values, 
# and then delete them from their hashes. For example: 

puts "#{hash1_key_a};#{hash2_key_a};1" # 1 is representing the referral we should 
             # put in for the value 

任何人都可以引導我在正確的方向嗎？

Answer 1

散列有不同的鍵嗎？然後你可以這樣做：

hash1.merge(hash2).group_by{|k,v| v}.each{ |v,ks| 
    puts "#{ ks.map(&:first)*';' };#{ v }" 
}