對CSV ::行對象

Question

我結束了10個CSV :: Row對象的數組。現在我想配對它們，因爲每個對象都有兩個同名的對象。現在我知道如何做到這一點，多循環的很長一段路，而且它不夠優雅。任何人有任何快速的1-2班輪做到這一點？

所以這是數組：

[#<CSV::Row "name":"eee.xxx" "time":"2014-10-31T15:35:14+00:00" "records":"98">, 
#<CSV::Row "name":"eee.yyy" "time":"2014-10-31T15:35:30+00:00" "records":"207">, 
#<CSV::Row "name":"sss.zzz" "time":"2014-10-31T15:35:44+00:00" "records":"205">, 
#<CSV::Row "name":"sss.qqq" "time":"2014-10-31T15:35:59+00:00" "records":"220">, 
#<CSV::Row "name":"sss.www" "time":"2014-10-31T15:36:15+00:00" "records":"220">, 
#<CSV::Row "name":"eee.xxx" "time":"2014-10-31T15:36:30+00:00" "records":"99">, 
#<CSV::Row "name":"eee.yyy" "time":"2014-10-31T15:36:42+00:00" "records":"210">, 
#<CSV::Row "name":"sss.zzz" "time":"2014-10-31T15:36:57+00:00" "records":"225">, 
#<CSV::Row "name":"sss.qqq" "time":"2014-10-31T15:37:12+00:00" "records":"210">, 
#<CSV::Row "name":"sss.www" "time":"2014-10-31T15:37:25+00:00" "records":"230">] 

我想用這樣的哈希落得：

{"eee.xxx" => [98,99], 
"eee.yyy" => [207,210], 
"sss.zzz" => [205,225], 
"sss.qqq" => [220,210], 
"sss.www" => [220,203]} 

任何想法？

Answer 1

是做如下： -

hash = array.each_with_object(Hash.new { |h,k| h[k] = [] }) do |row,hsh| 
    hsh[row['name']] << row['records'] 
end 

看那方法CSV::Row#[]，並且new {|hash, key| block } → new_hash方法。

另一種方法是： -

hash = array.each_with_object({}) do |row,hsh| 
    (hsh[row['name']] ||= []) << row['records'] 
end