into
into({}, map(a => ({['key' + a]: a})) , [1, 5, 12]); //=> {"key1": 1, "key12": 12, "key5": 5} into({}, map(a => ['key' + a, a]) , [1, 5, 12]); //=> {"key1": 1, "key12": 12, "key5": 5}