Solution: Word frequency counter

(intro music)…- [Instructor] How did you do with the challenge?…Hopefully, everything went well.…Let me share my solution to this challenge with you.…So, basically there are three steps.…We modify the filter operator,…we remove the count operator, and then we update the output.…And let's go ahead and start from scratch again,…and let me show you what I did.…So, here we are back in Visual Studio Code,…and what we're going to do, let's just redo…what we did previously.…

So, we're going to go ahead and say, auto values…equals rxcpp colon colon observable…and then we have iterate(ages).…Then, we have a dot to chain this together.…

Then, we're going to say filter…and we take a lambda again,…and then the lambda is going to get passed in age,…and that's going to be an integer.…And we're going to say return age,…greater than or equal to 13…and age…less than…or equal to 19,…and a semicolon.…

And then, we have another period here…to chain it together.…Then, we're going to do our subscribe.…Notice, we did not do a count at all.…