Sales Report: Aggregate a CSV
Read a table of sales rows, group them by region, and surface the top performer. The exact data loop every backend and analyst lives in.
What you'll be able to build
Read a table of sales rows, group them by region, and surface the top performer. The exact data loop every backend and analyst lives in. Along the way you pick up real, transferable Ruby skills, not just this one project:
- parsing rows with split or CSV
- group_by and Enumerable
- sum and max_by over groups
- Hash aggregation
- ranking with sort_by
- formatted tabular output
A course like this one
Yours is built from your own placement, so module count and depth will differ. This map shows what a intermediate-level Ruby learner building Sales Report actually gets.
- Module 1: Values, strings, and puts5 lessons
Builds the script for your sales report.
- Module 2: Collections: arrays, hashes, and Enumerable5 lessons
Builds the module workflow for your sales report.
- Module 3: Control flow, truthiness, and predicting output5 lessons
Builds the method that powers your sales report.
- Module 4: Methods, blocks, and reading errors5 lessons
Builds the reusable class for your sales report.
- Module 5: Classes, modules, and program design5 lessons
Builds the collection pipeline for your sales report.
- Module 6: Shipping a reusable Ruby tool3 lessons
Builds the command-line tool for your sales report.
How the lessons actually work
Every lesson has you predict what a piece of Ruby code will output before you run it, then run it for real in your browser and fix what you got wrong. Each module ends in a challenge gate with hidden tests, so you can't advance until your code actually works. The course closes with a capstone that assembles everything into Sales Report, and a runnable proof page tied to your own code.
Common questions
How long does the Sales Report: Aggregate a CSV course take?
about 7 hours, across 6 modules and 28 lessons, at roughly 15 minutes per lesson. Your own course may run shorter or longer, since it's sized to your placement result, not a fixed template.
Do I need experience?
Some. This is an intermediate-tier Ruby project, so it assumes you're comfortable with Ruby basics and pushes past them.
How much does it cost?
$15 one-time, no subscription. The first module is free, so you can see exactly how the course teaches before you pay for the rest.