Ruby Hash each()用法及代碼示例

Hash＃each()是一種Hash類方法，它通過將鍵值對作為參數傳遞來找到對哈希中的每個鍵調用一次塊的嵌套值。

用法：Hash.each()

參數：散列值

返回：如果沒有傳遞參數，則對哈希中的每個鍵調用一次塊，否則調用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"

輸出：

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"

輸出：

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}

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注：本文由純淨天空篩選整理自Kirti_Mangal大神的英文原創作品 Ruby | Hash each() function。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。