array = [
[ 1, "name1" ],
[ 2, "name2" ],
[ 3, "name3" ],
[ 4, "name4" ]
]
I want to make this as an array of hashes like this:
array_hash = [{ "id" => 1, "name" => "name1" },
{ "id" => 2, "name" => "name2" },
{ "id" => 3, "name" => "name3" },
{ "id" => 4, "name" => "name4" }]
array = [
[ 1, "name1" ],
[ 2, "name2" ],
[ 3, "name3" ],
[ 4, "name4" ]
]
array.map { |e| ['id', 'name'].zip(e).to_h }
#⇒ [
# {"id"=>1, "name"=>"name1"},
# {"id"=>2, "name"=>"name2"},
# {"id"=>3, "name"=>"name3"},
# {"id"=>4, "name"=>"name4"}
# ]
The only interesting here is Enumerable#zip, that “merges” arrays.
I'd use:
array.map { |id, name| { 'id' => id, 'name' => name } }
#=> [{"id"=>1, "name"=>"name1"},
# {"id"=>2, "name"=>"name2"},
# {"id"=>3, "name"=>"name3"},
# {"id"=>4, "name"=>"name4"}]
The .to_h method is new to Ruby 2.x. Here is an alternative for anyone on 1.9.x or lower.
array = [[ 1, "name1" ], [ 2, "name2" ], [ 3, "name3" ], [ 4, "name4" ]]
array.inject([]) { |a, r| a << { id: r[0], name: r[1] } }
