Ruby Hash member?用法及代码示例

Hash＃member？()是一个Hash类方法，它检查给定 key 是否存在于哈希中。

用法：Hash.member?()

参数：散列值

返回：true-如果给定的 key 存在于哈希中，否则返回false

范例1：

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

输出：

Hash a member? form:false

Hash b member? form:false

Hash c member? form:false

范例2：

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

输出：

Hash a member? form:true

Hash b member? form:false

Hash c member? form:true

相关用法

注：本文由纯净天空筛选整理自Kirti_Mangal大神的英文原创作品 Ruby | Hash member? function。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。