HTTP METHODS · 2026
ten methods per RFC 9110, 5789 and 10008: which are safe, which are idempotent, which can be retried
KANBAN
the board, the limit on work in progress, and the four metrics that measure flow
INSERTION SORT
the way cards are ordered in the hand · the trace of one real run
QUICKSORT
splitting around a pivot · the trace of one real run
TWO-CAMERA SPEAKER SETUP
the lighting triangle and where each of the 2 cameras stands · the floor plan from above
THREE-CAMERA SPEAKER SETUP
the lighting triangle and where each of the 3 cameras stands · the floor plan from above
UML DIAGRAMS
the fourteen kinds, and the notation a class diagram is made of
VIM COMMANDS
modes, motions and editing per the Vim 9.1 help — and the grammar that composes them into commands
CIRCLE OF FIFTHS
12 keys · key signatures · relative minors
DRUM KIT NOTATION
where every drum and cymbal sits on the staff — per the Percussive Arts Society standard
THE ELECTRIC GUITAR PICKUP
one coil or two · six builds · where it sits along the string, and how high above it
ARPEGGIOS ON FIVE STRINGS
major and minor in one position · an octave and a fifth from the root