ruby reorder keys in hash
To reorder keys in a Ruby hash, you can follow these steps:
- Convert the hash to an array of key-value pairs using the
to_a
method. This will create an array where each element is a two-element array representing a key-value pair from the original hash. - Sort the array of key-value pairs based on the desired order of the keys. You can use the
sort_by
method, providing a block that specifies the desired order. For example, if you want to sort the keys in ascending order, you can usesort_by { |key, value| key }
. - Convert the sorted array back into a hash using the
to_h
method. This will create a new hash with the keys in the desired order.
Here is an example that demonstrates these steps:
hash = { "b" => 2, "a" => 1, "c" => 3 }
sorted_hash = hash.to_a.sort_by { |key, value| key }.to_h
puts sorted_hash
Output:
{"a"=>1, "b"=>2, "c"=>3}
In this example, the original hash has keys "b", "a", and "c". After applying the steps outlined above, the keys are reordered to "a", "b", and "c", resulting in a new hash.