Ruby 哈希 value?()函数

Hash#value?() 是一个Hash类方法，用于检查参数’value’是否存在于数组中。

语法： Hash.value?()

参数： Hash value?

返回： true – 如果参数’value’存在于数组中，否则返回false。

例子 #1 :

# Ruby code for Hash.value?() 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}
 
 
# value? Value
puts "Hash a value? form : #{a.value?(200)}\n\n"
 
puts "Hash b value? form : #{b.value?(100)}\n\n"
 
puts "Hash c value? form : #{c.value?(300)}\n\n"

输出:

Hash a value? form : true

Hash b value? form : true

Hash c value? form : false

例子 #2 :

# Ruby code for Hash.value?() 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}
 
 
# value? Value
puts "Hash a value? form : #{a.value?(200)}\n\n"
 
puts "Hash b value? form : #{b.value?(200)}\n\n"
 
puts "Hash c value? form : #{c.value?(300)}\n\n"

输出:

Hash a value? form : true

Hash b value? form : false

Hash c value? form : true