Ruby Hash each()用法及代码示例

Hash＃each()是一种Hash类方法，它通过将键值对作为参数传递来找到对哈希中的每个键调用一次块的嵌套值。

用法：Hash.each()

参数：散列值

返回：如果没有传递参数，则对哈希中的每个键调用一次块，否则调用Enumerator。

示例1:

# Ruby code for Hash.each() 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} 
  
# each Value 
puts "Hash a each form : #{a.each()}\n\n"
  
puts "Hash b each form : #{b.each {|key| puts "#{key}"}}\n\n"
  
puts "Hash c each form : #{c.each {|value| puts "#{value}"}}\n\n"

输出：

Hash a each form : #

[:a, 100]
[:c, 300]
[:b, 200]
Hash b each form : {:a=>100, :c=>300, :b=>200}

[:a, 100]
Hash c each form : {:a=>100}

示例2:

# Ruby code for Hash.each() 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} 
  
  
# each Value 
puts "Hash a each form : #{a.each()}\n\n"
  
puts "Hash b each form : #{b.each {|key| puts "#{key}"}}\n\n"
  
puts "Hash c each form : #{c.each {|value| puts "#{value}"}}\n\n"

输出：

Hash a each form : #

["a", 100]
Hash b each form : {"a"=>100}

["a", 100]
["c", 300]
["b", 200]
Hash c each form : {"a"=>100, "c"=>300, "b"=>200}

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 each() 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。