Ruby Hash compare_by_identity?()用法及代碼示例

compare_by_identity？ ()是一種Hash類方法，用於檢查哈希鍵及其標識的比較，並將完全相同的對象視為相同的鍵

用法：Hash.compare_by_identity? ()

參數：哈希數組

返回：如果hash將通過其標識比較其鍵，則為true
否則為假

範例1：

# Ruby code for compare_by_identity?  () method 
  
# declaring Hash value 
a = {a:100, b:nil} 
  
# declaring Hash value 
b = {a:100, c:nil, b:"b"} 
  
# declaring Hash value 
c = {a:100} 
  
puts "compare_by_identity?   a:#{a.compare_by_identity? }\n\n"
  
puts "compare_by_identity?   b:#{b.compare_by_identity? }\n\n"
  
puts "compare_by_identity?   b:#{c.compare_by_identity? }\n\n"

輸出：

compare_by_identity?   a:false

compare_by_identity?   b:false

compare_by_identity?   b:false

範例2：

# Ruby code for compare_by_identity?  () method 
  
# declaring Hash value 
a = { "a" => 100, "b" => 200 } 
  
# declaring Hash value 
b = {"a" => 100} 
  
# declaring Hash value 
c = {"a" => 100, "c" => "c", "b" => 200} 
  
puts "compare_by_identity?   a:#{a.compare_by_identity? }\n\n"
  
puts "compare_by_identity?   b:#{b.compare_by_identity? }\n\n"
  
puts "compare_by_identity?   b:#{c.compare_by_identity? }\n\n"

輸出：

compare_by_identity?   a:false

compare_by_identity?   b:false

compare_by_identity?   b:false

相關用法

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 compare_by_identity? () 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。