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databases/sql-indexes-why-finding-one-row-among-200-000-takes-about-18-steps.md
SQL indexes: why finding one row among 200,000 takes about 18 steps
A database with 200,000 customers can answer "find this email" by reading every row, or by reading about 18 entries. The difference is an…
databases/what-is-a-database-index-find-one-row-without-reading-them-all.md
What is a database index? Find one row without reading them all
Ask a database for one person among a million rows and it could read every row until it finds them. That is slow. An index is the…
software-design/how-to-read-a-python-error-message-without-panicking.md
How to read a Python error message without panicking
When Python crashes it prints a traceback: a report of what went wrong and where. It looks scary, but it has a fixed shape, and the most…