#data

3 posts.

Data Fetching in Next.js: fetch, cache, and revalidate

A practical guide to data fetching in Next.js — async Server Components, the fetch cache, no-store and revalidate options, generateStaticParams for static routes, and server actions for mutations.

Jun 16, 2026 ·11 min read · #nextjs#intermediate#data

Pandas groupby, merge, and concat

A practical guide to combining and summarising DataFrames — groupby with named aggregations, multi-column aggregates, the four merge styles, and stacking with concat.

Jun 16, 2026 ·9 min read · #pandas#python#intermediate

Pandas DataFrames: Reading, Selecting, and Filtering

A practical guide to the daily DataFrame moves — read_csv and read_json, head and info, column selection, loc vs iloc, boolean filtering, sorting, and value_counts.

Jun 15, 2026 ·8 min read · #pandas#python#data