- Build a method that yields members of a collection to a block.
- Control the return value of a method that uses
yield
such that it returns a new collection.
You'll be writing your code in lib/my_collect.rb
.
Let's say we are writing an app to help teachers manage their students. Our teacher has a list of students:
["Tim Jones", "Tom Smith", "Jim Campagno"]
The list includes the first and last name of each student, but our teacher needs to collect a list of just their first names.
You are writing a method that behaves just like the real #collect
method. It should take in an argument of a collection, iterate over that collection using a while
loop, and execute the code in the block you call it with for each element in the collection (use the yield
keyword). It should return the modified collection.
So, if our teacher uses #my_collect
to collect the first name of his students, it should work like this:
array = ["Tim Jones", "Tom Smith", "Jim Campagno"]
my_collect(array) do |name|
name.split(" ").first
end
Should return:
["Tim", "Tom", "Jim"]
Make sure to run bundle install before running your tests.