红宝石 |哈希 to_a 方法
Hash#to_a()是一个 Hash 类方法,它给出了一个键值对的嵌套数组。
Syntax: Hash.to_a()
Parameter: Hash values
Return: array representation of the hash
示例 #1:
# Ruby code for Hash.to_a() 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}
# to_a Value
puts "Hash a to_a form : #{a.to_a()}\n\n"
puts "Hash b to_a form : #{b.to_a()}\n\n"
puts "Hash c to_a form : #{c.to_a()}\n\n"
输出 :
Hash a to_a form : [[:a, 100], [:b, 200]]
Hash b to_a form : [[:a, 100], [:c, 300], [:b, 200]]
Hash c to_a form : [[:a, 100]]
示例 #2:
# Ruby code for Hash.to_a() 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}
# to_a Value
puts "Hash a to_a form : #{a.to_a()}\n\n"
puts "Hash b to_a form : #{b.to_a()}\n\n"
puts "Hash c to_a form : #{c.to_a()}\n\n"
输出 :
Hash a to_a form : [["a", 100], ["b", 200]]
Hash b to_a form : [["a", 100]]
Hash c to_a form : [["a", 100], ["c", 300], ["b", 200]]