I have an array,
array = [1,2,3]
Need to transform it to:
newArray = [{id: 1}, {id: 2}, {id: 3}]
I know this, Is there any efficient way?
array.each { |id| newArray << { id: id } }
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2 Answers
Anything like this?
array.map { |id| Hash[:id, id] }
the same with hash literal
array.map { |id| { id: id } }
Comments
A very elegant way:
- convert to string
- build the JSON style object
- convert to array (inside the string)
- let JSON parse it, for more (thread) safety
- symbolize the keys, because in ruby it's preferred to use keys rather than strings
additionally you could use Base58 random key and hash it twice to mitigate timing attacks
JSON.parse([1,2,3].map(&:to_s).collect{ "{\"id\": \"#{_1}\"}" }.join(",").prepend("[").concat("]")).collect(&:symbolize_keys)
=> [{:id=>"1"}, {:id=>"2"}, {:id=>"3"}]
