Blog
Practical guides on the formats and tools you use every day.
Unix Timestamps Explained: Seconds vs Milliseconds
The single most common timestamp bug is a factor of 1000. Here is how Unix time works and how to spot seconds-vs-milliseconds mistakes fast.
Read articleA Practical Guide to Regex Lookaheads and Lookbehinds
Lookaheads and lookbehinds let you match a pattern based on what surrounds it without consuming those characters. Here is how they actually work.
Read articleHow to Decode a JWT (and What Not to Trust in the Payload)
JWTs are readable by anyone, not just verified by your server. Here is what decoding actually shows you, and the security mistakes it leads to.
Read articleJSON vs CSV: Which Format Should You Use?
A practical comparison of JSON and CSV for APIs, spreadsheets, and data pipelines, with guidance on when to convert between them.
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