Charts for people who write code
These are not tutorials. They are the things you know perfectly well and still look up: which redirect preserves the method, what flex: 1 actually expands to, whether a change is in the working tree or the index, how many bytes someone means by a gigabyte.
HTTP status codes are grouped by class rather than listed in numeric order, because that is how they are reasoned about. Flexbox is split into what belongs on the container and what belongs on the item — the distinction people actually get wrong. The Git sheet draws the places a change can be sitting between your editor and the remote. And the data units sheet runs from the bit upwards, where the same word keeps meaning two different numbers.
They belong on the wall of a study or a small office: the kind of reference you glance at without breaking a train of thought to open a browser tab.
HTTP STATUS CODES
five classes · twenty codes you meet every day
IFS AND FIELD SPLITTING
Two kinds of delimiter: white ones merge into one, non-white ones each cut on their own — and the same value gives one field or four
SPECIAL-PURPOSE IPv4 BLOCKS
14 blocks that belong to no host on the internet — 13.8 % of the address space, of which exactly one eighth is multicast and reserved
IPv6 ADDRESS NOTATION
eight groups of sixteen bits, the double colon, and one canonical spelling out of thousands
JAVASCRIPT vs GO
seven questions, the same to both, and the document each answer is written in
JAVASCRIPT vs RUST
seven questions, the same to both, and the document each answer is written in
KANBAN
the board, the limit on work in progress, and the four metrics that measure flow
LANGUAGE CODES
487 rows in ISO 639-2; 183 languages also have a two-letter code and 20 have two three-letter ones — and the tag is always the shortest
LIFE CYCLE MODELS
the same steps arranged five ways: the document, the year, and what one turn of the loop covers
LOGIC GATES
Seven digital-logic symbols — and how to build six of them from a single element, NAND
MARKDOWN SYNTAX
headings, emphasis, lists, links and code per the CommonMark 0.31.2 specification — the core all dialects share
MEDIA TYPES
2322 registered subtypes under 11 top-level types, and how to read one you have never seen