find the range of all keys in a map in ruby

To find the range of all keys in a map in Ruby, you can use the keys method to retrieve an array of all the keys in the map, and then use the min and max methods to find the minimum and maximum keys, respectively. Finally, you can use the Range class to create a range object representing the range of keys.

Here's the code:

main.rb
map = { 'a' => 1, 'b' => 2, 'c' => 3 }
keys = map.keys

key_range = keys.min..keys.max

puts key_range.inspect
# Output: "a".."c"
130 chars
8 lines

This code creates a map with three key-value pairs, retrieves an array of all the keys in the map, finds the minimum and maximum keys in the array, and creates a range object representing the range of keys from "a" to "c".