git.iko.soy/urbit.org
on 3c19574 help sign in
urbit.org/docs/hoon/limb.md
25 lines 723 B history raw
1---
2navhome: /docs/
3next: true
4sort: 20
5title: Limbs and wings
6---
8# Limbs and wings
10One feature Hoon lacks: a context that isn't a first-class value.
11Hoon has no concept of scope, environment, etc. A hoon has one
12data source, the *subject*, a noun like any other.
14In most languages "variable" and "attribute" are different
15things. They are both symbols, but a variable is in "the
16environment" and a attribute is on "an object." In Hoon, "the
17environment" is "an object" -- the subject.
19`%limb` and `%wing` are two basic hoon stems that extract
20information from the subject. A `limb` is an attribute; a `wing`
21is an attribute path, ie, a list of limbs.
23## Stems
25<list dataPreview="true" className="runes"></list>