Big-O Cheatsheet
Cheatsheet: Time and space complexity for every common data structure and algorithm. Same operation shown across Java, Python, C++, and JavaScript so you can compare directly.
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Computer Science Reference Material
Long-form CS references written by the CSHH tutors who use them in sessions every day. Cheatsheets, compiler-error catalogues, debugging walkthroughs, language comparisons, and anonymized sample work, every page designed to hold up under exam pressure.
5 Cornerstone References
21k+ Words of Reference
100+ Code Snippets
4 Languages Covered
Why the Resources Cluster
Reference material that mirrors how tutors actually work
Cheatsheets in textbook appendices stop at the worst case and skip the why. CSHH built this cluster so a student can find verbatim compiler output, side-by-side complexity across 4 languages, real GDB and Valgrind traces, and the same diagnostic playbooks our tutors use in live sessions. Free to read, written to the same standard as paid work.
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Five cornerstone CS references
Common Compiler Errors
Guide: 40 errors across 5 languages, every one paired with the verbatim compiler output, root cause, and the Broken vs Fixed snippet that resolves it.
Read Common Compiler ErrorsDebugging Guide
Guide: A repeatable 5-step process for finding bugs in C, C++, Java, Python, and JavaScript. With actual GDB session output, a Valgrind trace, and a pytest reproduction template.
Read Debugging GuideLanguage Comparison
Comparison: Java, Python, C++, JavaScript, C, and Assembly compared across 7 axes that matter for coursework. With autograder-compatibility notes per language.
Read Language ComparisonSample Work
Gallery: 6 anonymized samples showing how CSHH delivers a CS homework solution. Each entry: the brief, the approach, the working code, test coverage, and the grade the student received.
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Subjects
Six cornerstone CS subjects from data structures through machine learning, each with named failure modes and matched tutors.
Browse SubjectsTopics
Concept-first pages on Big-O notation, recursion, pointers, and concurrency with cross-language benchmarks.
Browse TopicsTutors who wrote these
Every reference is authored by a named CSHH tutor. See their credentials, specialties, and assignment history.
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