What are some advanced methods in Ruby?

What are some advanced methods in Ruby?

In Ruby, advanced methods include map, select, inject, and each_with_object. Would you like examples of these?

Yes, please provide examples for each of them.

Sure! For map, it transforms elements: [1, 2, 3].map { |n| n * 2 } results in [2, 4, 6]. For select, it filters: [1, 2, 3].select { |n| n.even? } gives [2]. For inject, it accumulates: [1, 2, 3].inject(0) { |sum, n| sum + n } results in 6. Lastly, each_with_object allows you to build a new object: [1, 2, 3].each_with_object([]) { |n, arr| arr << n * 2 } gives [2, 4, 6].

That's really helpful! Can you explain how inject works in more detail?

Absolutely! The inject method takes an initial value and a block. It iterates through the array, passing the accumulated value and the current element to the block. The result of the block becomes the new accumulated value for the next iteration. This continues until all elements are processed.