challenge-solutions.md

Challenge Solutions

The goal of these snippets is to count the number of usernames in the participants file. There are a lot of ways to do this, but we have collected a few here. Please submit pull requests if you have a neat or interesting solution you'd like to add.

break the problem into steps

cat participants.md | grep " -" | wc -l

1. cat spits the data from participants.md onto stdout
2. grep "- " selects only those lines with a markdown list element
3. wc -l counts the lines in the result

I guess grep can do it by itself:

grep " -" participants.md -c

grep -c counts the lines of the result, and it accepts a list of files to search through.