I've been given the following data structure:
users = {
"Jonathan" => {
:twitter => "tronathan",
:favorite_numbers => [12, 42, 75],
},
"Erik" => {
:twitter => "sferik",
:favorite_numbers => [8, 12, 24],
},
"Anil" => {
:twitter => "bridgpal",
:favorite_numbers => [12, 14, 85],
},
}
I need to return all of Anils favourite numbers that are even. This is what I have so far:
users["Anil"][:favorite_numbers].each do |evennum|
if evennum.even?
puts evennum
end
end
You could do something like this
anil_favorite_even_numbers = users['Anil'][:favorite_numbers].select(&:even?)
This takes for granted that a user Anil exists and the favourite_numbers inside it too and that's an array. Otherwise we need a little bit of extra work.