Block Return Values

Remember when we learned that a block returns a value just like methods do? So far, in our two previous examples, we didn’t do anything with the block’s return values.

An example using collect

Here’s an example that does that:

This takes the array of numbers and transforms it into another array.

Explanation

• It does this by calling the collect method on the original array, which executes the given block for each element and collects each array return value returned by the block. The resulting array is then returned by the collect method and printed to the screen.

• In other words, the collect method uses the block as a transformer. It takes each element of the array, passes it to the ...