14 stories
Nine probe notebooks, three export paths, twenty-seven conversion attempts, and a count of what actually survives into each PDF. The LaTeX route keeps every column of a wide DataFrame and drops four of eight Unicode strings; the browser routes do the reverse, and clip a long source line as well.
We checked every request that claimed to be GPTBot, ClaudeBot, PerplexityBot and the rest against the operators' published IP lists. Then we looked at what the real ones read. The data is downloadable.
The package imports in your terminal and fails in the notebook. Four virtual environments, nine notebook runs, and the one line of jupyter_client source that decides which Python your kernel actually runs — with the audit script that answers it for your machine.
The vault is a plain directory of FLAC and text files. Put it on iCloud, a NAS or a USB stick, and keep two machines in step with no sync server.
The common nbconvert PDF export errors, each with real terminal output, the actual cause, and a fix. Covers PandocMissing, xelatex not found, missing .sty files, webpdf/Playwright, and kernel errors.
jq is sed for JSON. The filters you use most, built up against one API response so every command has a visible result, from map and select to group_by and raw output.
The prefix length tells you how many addresses a block holds and how many you can assign. The full /8 to /32 table, the reserved ranges, and the math to find a network and broadcast by hand.
The regex pieces you actually reach for, character classes through lookarounds, with the flavor differences that bite you and a handful of patterns worth saving.
The ports people actually look up, grouped by use, each with the protocol that matters and what runs there. Web, mail, file and shell, databases, infrastructure, and local dev ports.
JSONPath is XPath for JSON. One small store document, threaded through wildcards, slices, filters and recursive descent, with the honest note on how implementations vary.
TOML aims to be obvious and minimal; YAML serializes any data a human can read. The same config in both, YAML's sharp edges stated accurately, and where each one won.
1000 words is two pages single-spaced or four double-spaced in a standard 12-point font. The full word-to-page conversion table from 250 to 10,000 words, and the settings that move the count.
A transition words list sorted by the job each one does, from addition to conclusion, plus guidance on using them without sounding mechanical and which words read as stiff.
What Jupyter's .ipynb_checkpoints folders are, whether it is safe to delete them, and why adding them to .gitignore does not untrack the ones you already committed - with a throwaway repository showing exactly what each untracking command does to your index.
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