Question

我有以下哈希数组：

 [{"dwidNote"=>14, "StreetAddress"=>"250 Palm Valley Blvd.", "PropertyAddress"=>"250 Palm Valley Blvd."},
 {"dwidNote"=>16, "StreetAddress"=>"2801 Alaskan Way", "PropertyAddress"=>"2801 Alaskan Way"},
 {"dwidNote"=>17, "StreetAddress"=>"300 LAKESIDE DRIVE", "PropertyAddress"=>"300 LAKESIDE DRIVE  "},
 {"dwidNote"=>18, "StreetAddress"=>"3817 PARKDALE", "PropertyAddress"=>"3817 PARKDALE  "}]

我需要比较键StreetAddress和PropertyAddress的值，看看它们是否匹配。对于不匹配的值，我需要显示键dwidNote的值。我该怎么做？

Answer 1

假设您的数组位于名为a的变量中，那么：

a.select{|e| e['StreetAddress'] != e['PropertyAddress']}.map{|e| e['dwidNote']}

将返回此信息：

[17, 18]

Answer 2

array = [{"dwidNote"=>14, "StreetAddress"=>"250 Palm Valley Blvd.", "PropertyAddress"=>"250 Palm Valley Blvd."},
 {"dwidNote"=>16, "StreetAddress"=>"2801 Alaskan Way", "PropertyAddress"=>"2801 Alaskan Way"},
 {"dwidNote"=>17, "StreetAddress"=>"300 LAKESIDE DRIVE", "PropertyAddress"=>"300 LAKESIDE DRIVE  "},
 {"dwidNote"=>18, "StreetAddress"=>"3817 PARKDALE", "PropertyAddress"=>"3817 PARKDALE  "}]

array.map { |x|
   x["dwidNote"] if x["StreetAddress"] != x["PropertyAddress"]
}.compact

会完成这项工作

Answer 3

我愿意：

arr = [{"dwidNote"=>14, "StreetAddress"=>"250 Palm Valley Blvd.", "PropertyAddress"=>"250 Palm Valley Blvd."}, {"dwidNote"=>16, "StreetAddress"=>"2801 Alaskan Way", "PropertyAddress"=>"2801 Alaskan Way"}, {"dwidNote"=>17, "StreetAddress"=>"300 LAKESIDE DRIVE", "PropertyAddress"=>"300 LAKESIDE DRIVE  "}, {"dwidNote"=>18, "StreetAddress"=>"3817 PARKDALE", "PropertyAddress"=>"3817 PARKDALE  "}]

arr.map { |h| h['dwidNote'] unless h['StreetAddress'] == h['PropertyAddress']  }.compact
#=> [17, 18]

使用哈希数组我需要比较两个值

3 个答案: