generate a hash from this: `%w[black brown red` such that values are its index. in ruby

To generate a hash where the values are the indices of the elements in the given array, you can use the each_with_index method to iterate through the array and build the hash. Here's an example of how you can generate the hash in Ruby:

main.rb
array = %w[black brown red]
hash = {}

array.each_with_index do |value, index|
  hash[value] = index
end

puts hash
116 chars
9 lines

Output:

main.rb
{"black"=>0, "brown"=>1, "red"=>2}
35 chars
2 lines

In this example, we initialize an empty hash and then use the each_with_index method to iterate through each element in the array along with its index. Within the loop, we assign the value as the key and the index as the value in the hash. Finally, we print the resulting hash.

Note: The indices start from 0, so "black" has an index of 0, "brown" has an index of 1, and "red" has an index of 2 in the resulting hash.