I have the following Hash -
{ result: [ {id: 378, name: 'Pete'}, {id: 567, name: 'Pete'} ] }
I want to extract array of id's from this hash, something like this -
[378, 567]
Whats the shortest way to do it, apart from looping through the result array. Theres a map method for this but I am not quite sure how to use it.
Help is appreciated.
That map method is pretty convenient. If your input looks like this:
input = { :result => [ {:id => 378, :name => 'Pete'}, {:id => 567, :name => 'Pete'} ] }
You can extract the ids like so:
ids = input[:result].map{ |obj| obj[:id] }
puts ids.inspect
collect method feels more intuitive.. ; )I didn't use map in order to get those values. You can use the following technique:
a = { result: [ {id: 378, name: 'Pete'}, {id: 567, name: 'Pete'} ] }
i= [0,1]
output_value = []
for b in i
output_value << a.values[0][b][:id]
end
output_value
