What are some basic enumerable methods in Ruby?

What are some basic enumerable methods in Ruby?

In Ruby, enumerable methods are used to traverse, search, and sort collections. Some basic ones include map, select, and reduce. Would you like examples of how to use them?

Yes, please provide an example of the map method.

Sure! The map method transforms each element in a collection. For example:

numbers = [1, 2, 3]
result = numbers.map { |n| n * 2 }
puts result.inspect  # Output: [2, 4, 6]

What about the select method?

The select method filters elements based on a condition. For example:

numbers = [1, 2, 3, 4]
even_numbers = numbers.select { |n| n.even? }
puts even_numbers.inspect  # Output: [2, 4]

Can you explain the reduce method as well?

Absolutely! The reduce method combines all elements of a collection into a single value. For example:

numbers = [1, 2, 3]
sum = numbers.reduce(0) { |acc, n| acc + n }
puts sum  # Output: 6