红宝石 |哈希 assoc()函数
assoc()是一个 Hash 类方法,它通过 Hash 搜索元素。
Syntax: Hash.assoc()
Parameter: Hashs for finding elements.
Return: searches an element through the Hash
示例 #1:
# Ruby code for assoc() method
# declaring Hash value
a = { "a" => 100, "b" => 200 }
# declaring Hash value
c = {"a" => 100, "c" => 300, "b" => 200}
puts "check : #{a.assoc("a")}\n\n"
puts "check : #{c.assoc("b")}\n\n"
puts "check : #{c.assoc("c")}\n\n"
输出 :
check : ["a", 100]
check : ["b", 200]
check : ["c", 300]
示例 #2:
# Ruby code for assoc() method
# declaring Hash value
b = {a:100, c:300, "b" => ["200", "100", "300"]}
puts "check : #{b.assoc("b")}\n\n"
输出 :
check : ["b", ["200", "100", "300"]]