#concepts (1)

Cheat sheets (1)

Structural Typing — Duck Typing at the Type Level

Understand TypeScript's structural type system — assignability is based on shape, not name; excess property checks are the one exception; nominal typing requires branded types or class privates.

typescript types concepts language

g h	home
g p	Programming section
g p	Python section
g j	JavaScript section
g t	TypeScript section
g o	OS section
g l	Linux section
g w	Windows section
g z	z/OS section
g o	macOS section
g a	AI section
g c	Claude Code section
g c	Codex CLI section
g c	Claude API section
g p	Prompting section
g f	Frameworks section
g p	Packages section
g p	Pip (Python) section
g p	npm (Node) section
g p	Cargo (Rust) section
g p	Go modules section
g g	graph view
g t	tags index

⌘K / /	open search palette
t	cycle theme (dark → light → system)
?	toggle this panel

[ / ]	previous / next sheet in section
j / k	scroll down / up