Developer Cheat Sheets
Ten pages of reference cards, visual diagrams, and decision flowcharts in one PDF. Pin them to your wall, tape them to your monitor, keep them on your desk. Stop Googling the same things.
Regex Quick Reference
Character classes, quantifiers, anchors, flags, groups, lookarounds, and common patterns like email, URL, and date validation.
Git Commands + Recovery Flowchart
Setup, daily workflow, branching, history, undo/recovery, tags, and aliases. Plus a visual "I messed up" decision tree for common git disasters.
HTTP Status Codes
Every status code you will actually encounter, plus common headers and REST conventions. 1xx through 5xx with plain descriptions.
Cron Expressions
5-field format diagram, special characters, 15 common schedules, step/range examples, named shortcuts, and crontab commands.
CSS Flexbox & Grid
Container and item properties with visual diagrams showing what each value actually does. Includes grid layout patterns you can copy directly.
Terminal & Shell
Keyboard shortcuts, file operations, search/filter commands, pipes and redirection, and process management. Bash and Zsh.
A taste of what's inside
. any character except newline
\d digit [0-9]
\w word char [a-zA-Z0-9_]
\s whitespace [ \t\n\r\f]
\b word boundary
Quantifiers
* 0 or more
+ 1 or more
? 0 or 1
{3} exactly 3
{2,5} between 2 and 5
... and 40+ more entries
→ git log --oneline -1 (copy hash)
→ git checkout correct-branch
→ git cherry-pick <hash>
→ git checkout wrong-branch
→ git reset HEAD~1
I need to undo the last commit
keep changes: git reset --soft HEAD~1
discard changes: git reset --hard HEAD~1
... plus 6 more recovery scenarios
200 OK
201 Created
204 No Content
4xx Client Error
400 Bad Request
401 Unauthorized (not authenticated)
403 Forbidden (authenticated, no access)
404 Not Found
409 Conflict
422 Unprocessable Entity
429 Too Many Requests
... covers 1xx through 5xx
┌─── minute (0-59)
│ ┌─── hour (0-23)
│ │ ┌─── day of month (1-31)
│ │ │ ┌─── month (1-12)
│ │ │ │ ┌─── day of week (0-6)
* * * * *
Common schedules
0 9 * * 1-5 weekdays 9am
*/15 * * * * every 15 min
0 0 1 * * first of month
... 15 schedules total
These are excerpts. Each sheet is a full-page, printable reference card.
Frequently asked questions
What format is it?
A single PDF with ten pages — six reference sheets plus a cover, a git recovery flowchart, visual CSS diagrams, and a common gotchas page. US Letter size. Prints cleanly in color or grayscale.
Can I print it?
That is the entire point. Print them all, pick the ones you need, pin them up. They are designed to be readable at arm's length.
Will you add more sheets?
Yes. Future sheets (Docker, SQL, etc.) will be free updates for existing buyers.
Is there a refund policy?
If you are not happy, email and you will get a refund. No questions.
Why not just Google this stuff?
You can. You have been. That is why you are here. Having it on paper next to your screen is faster than switching tabs.