find the largest value in a map in ruby

To find the largest value in a Ruby map, you can use the max_by method. The max_by method returns the element that has the largest value, with the value being determined by the block that is passed in.

Here's an example of how you can use max_by to find the largest value in a map:

main.rb
map = { "a" => 1, "b" => 2, "c" => 3 }
largest_value = map.max_by { |key, value| value }[1]
puts largest_value # Output: 3
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In this example, we first define a map with three key-value pairs. Then, we call max_by on the map, passing in a block that specifies that we want to determine the largest value based on the values of the key-value pairs. Finally, we access the value of the largest key-value pair by using the index [1]. The output of this code is 3, which is the largest value in the map.