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[英]how to check if a certain key-value pair exists in array of hashes as json in ruby on rails
[英]Ruby: replace the values in a key-value pair of an array of hashes with the values from a 2nd array
在Ruby中,我有一個哈希數組和一個數組。 在我的哈希數組中,我想用第二個數組中的值替換鍵-值對之一中的值。 什么是最干凈的方法來做到這一點?
示例(我想用第二個數組中的值替換“ total”的值):
散列數組:
[{"date":"2012-05-27","total":1},{"date":"2012-05-28","total":9}]
陣:
[1, 10]
所需的哈希數組:
[{"date":"2012-05-27","total":1},{"date":"2012-05-28","total":10}]
array.each_with_index {|e,i| hash_array[i]["total"] = e}
hashes = [{date: "2012-05-27", total: 1},{date: "2012-05-28", total: 9}] #unquoted keys
values = [1,10]
hashes.zip(values){|h,v| h[:total] = v}
p hashes #=>[{:date=>"2012-05-27", :total=>1}, {:date=>"2012-05-28", :total=>10}]
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