compare_by_identity? ()是一种Hash类方法,用于检查哈希键及其标识的比较,并将完全相同的对象视为相同的键
用法:Hash.compare_by_identity? ()
参数:哈希数组
返回:如果hash将通过其标识比较其键,则为true
否则为假
范例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"
输出:
compare_by_identity? a:false compare_by_identity? b:false compare_by_identity? b:false
范例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"
输出:
compare_by_identity? a:false compare_by_identity? b:false compare_by_identity? b:false
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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 compare_by_identity? () 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。