红宝石 |哈希挖掘()函数
Hash#dig()是一个 Hash 类方法,它通过在每一步调用 dig 来查找由键对象的序列指定的嵌套值。
Syntax: Hash.dig()
Parameter: Hash values
Return: nested value which is specified by the sequence of the key object by calling dig at each step. otherwise nil
示例 #1:
# Ruby code for Hash.dig() method
# declaring Hash value
a = {a:100, b:200}
# declaring Hash value
b = {a:100, c:300, b:200}
# declaring Hash value
c = {a:100}
# Dig Value
puts "Hash a dig form : #{a.dig(:a)}\n\n"
puts "Hash b dig form : #{b.dig(:c)}\n\n"
puts "Hash c dig form : #{c.dig(:a)}\n\n"
输出 :
Hash a dig form : 100
Hash b dig form : 300
Hash c dig form : 100
示例 #2:
# Ruby code for Hash.dig() method
# declaring Hash value
a = { "a" => 100, "b" => 200 }
# declaring Hash value
b = {"a" => 100}
# declaring Hash value
c = {"a" => 100, "c" => 300, "b" => 200}
# Dig Value
puts "Hash a dig form : #{a.dig("a")}\n\n"
puts "Hash b dig form : #{b.dig("a")}\n\n"
puts "Hash c dig form : #{c.dig("b")}\n\n"
输出 :
Hash a dig form : 100
Hash b dig form : 100
Hash c dig form : 200