ruby each_with_object

The each_with_object method in Ruby is an iterator that allows you to iterate over a collection and accumulate a result. Here is an explanation of each step involved in using each_with_object:

  1. The method takes two arguments: a collection and an object. The collection can be an array or a hash, while the object is the initial value for the accumulator.

  2. The method starts iterating over each element in the collection. For each element, it yields both the element and the object to the block.

  3. Inside the block, you can perform operations on the element and the object. The element represents the current element in the iteration, while the object represents the accumulator.

  4. The result of the block is then assigned back to the object. This allows you to update the accumulator based on the element being processed.

  5. After iterating over all the elements in the collection, the method returns the final value of the object, which represents the accumulated result.

Here is an example to illustrate the usage of each_with_object:

numbers = [1, 2, 3, 4, 5]
result = numbers.each_with_object([]) do |number, array|
  array << number * 2
end

puts result
# Output: [2, 4, 6, 8, 10]

In this example, we have an array of numbers. We use each_with_object to iterate over each number in the array and accumulate a new array. Inside the block, we multiply each number by 2 and append it to the array. Finally, we print the result, which is the new array with each element doubled.

I hope this explanation helps you understand the each_with_object method in Ruby. Let me know if you have any further questions.