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Research & Reports

Data-driven research, reports, statistics and evidence-based analysis from Learn Coding USA. Explore findings and trends relevant to coding, software development, technology and learning in the United States and beyond.

20 posts

Conceptual AI feedback illustration with a red speech bubble, stopwatch, rubric card and unopened exercise envelope beside a notebook.

ByCode Guide

November 1, 2026

AI Feedback for Coding Learners: What a 36-Student US Pilot Shows

A 36-student US pilot offers a useful evidence audit. Separate respondent perceptions, estimated preparation times and unresolved learning claims with five figures and four reusable CSV tools.

Conceptual branching commit trails leading to a finished portfolio folder, with an inspection lens and evidence cards.

ByCode Guide

November 1, 2026

GitHub Commit Counts Are Not a Coding-Skill Score: A Portfolio Audit

Two local Git histories end with identical files but different commit totals. Use the reproducible fixture and evidence ledger to make bounded portfolio claims after Octoverse 2026.

Conceptual Sudoku solver uniqueness check illustration with an abstract puzzle board branching toward two candidate boards.

ByCode Guide

November 1, 2026

Build a Sudoku Solver That Checks Uniqueness, Not Just Finds an Answer

Finding one board does not prove uniqueness. Our original Python exercise runs eight Sudoku fixtures across nine cases, validates six returned boards and preserves uncertainty when certification is deliberately stopped.

Conceptual soft navigation Web Vitals illustration with red and blue lenses viewing different browser scopes beside a stopwatch.

ByCode Guide

November 1, 2026

Soft Navigation Web Vitals: Check What Your Dashboard Measures

A lower p75 can reflect a different event population. Compare Sentry’s reported figures with a transparent synthetic percentile exercise, coverage checks and an unexecuted route-testing protocol.

Conceptual Node.js 26 LTS planning illustration showing a laptop, calendar gateway and distant maintenance toolbox.

ByCode Guide

November 1, 2026

Node.js 26 LTS: Choose a Runtime That Outlasts Your Coding Project

Node 22, 24 and 26 offer 180, 546 and 911 days of planned support from 1 November 2026. Our date calculations, fictional stack comparison and CSV tools help learners plan around earlier constraints.

Conceptual developer illustration for TypeScript 7.1 beta performance evaluation, with a laptop, stopwatch and measurement notes.

ByCode Guide

October 25, 2026

TypeScript 7.1 Beta Benchmarks: Is the Upgrade Worth Testing?

Five publisher codebases, transparent time and memory calculations, and a blank benchmark log help you decide whether a controlled TypeScript beta evaluation is worthwhile.

Conceptual illustration of a learner and mentor reviewing a code diff and test checklist for AI-assisted open source contributions.

ByCode Guide

October 25, 2026

Your First AI-Assisted Open-Source Pull Request: What to Verify Before Submitting

What should you verify before your first AI-assisted pull request? Compare survey findings with a six-part evidence packet, while keeping self-reports separate from measured outcomes.

Conceptual illustration of a coding learner comparing package-update completion with dependency visibility for pnpm 12 Dependabot security alerts.

ByCode Guide

October 25, 2026

pnpm 12 and Dependabot: Why Working Updates Can Hide Missing Security Alerts

A working update pull request does not prove scanner coverage. Compare GitHub’s lockfile limitation, pnpm’s reported benchmarks and three upgrade-acceptance gates.

Conceptual illustration for updating pip in existing virtual environments: a coding learner comparing separate project notebooks beside a laptop.

ByCode Guide

October 25, 2026

Updated Python? Check Your Old Virtual Environments, pip and Certificates

Compare six Python tool thresholds, separate pip’s bundled certificates from project certifi, and use an environment inventory with clear verification records.

Conceptual illustration of a developer checking the PHP security update October 2026 with a laptop and verification checklist.

ByCode Guide

October 25, 2026

PHP Security Update October 2026: How to Verify Your Web App Is Patched

Compare four PHP branches, identify the runtime serving your app and review the separate session advisory. Five branded visuals and a reusable patch-evidence register.