03 / LOGIC

Computer
programming

Small playgrounds for patterns, algorithms, syntax, and the parts of software that are easiest to understand by trying.

REGEX DEBUGGER

Pattern tester

Test a pattern against a sample string.

Matches appear here.
ALGORITHM

Sorting, in motion

CHEAT SHEET

Syntax drawer

const answer = items.map(item => item.value);
LAYOUT LAB

Flexbox & Grid

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API testing playgroundMock JSON, async requests, and errors.
Git Git-Good guideBranches, merges, rebases, and conflicts.
Daily challengeOne small logic problem each day.
Framework comparisonReact, Vue, and Svelte trade-offs.
Open-source directoryBeginner-friendly good-first issues.
Code performance benchCompare snippets with repeatable timing.