All,
I was wondering if anyone knew a better patten than:
array_of_hashes.map { |hash_from_array| hash_from_array[:key] }
for retrieving an array of values with a specific key from an array of hashes containing that key.
All,
I was wondering if anyone knew a better patten than:
array_of_hashes.map { |hash_from_array| hash_from_array[:key] }
for retrieving an array of values with a specific key from an array of hashes containing that key.
From the Ruby code perspective, the map
is pretty elegant and straightforward.
From the algorithmic point of view (to address the computer-science tag), it seems a solution to this problem cannot be better than going through the whole array once (i.e. a map
here), so it will take as much time as to process each hash in the array.
@Vlad: Compacting the returned array depends on what will be done with the array, right? :-)