urbit/base/pub/doc/hoon/runes/cn.md
Anton Dyudin 6cbb6b060d Revert "remove docs for demo", "remove odds and ends", "demo network", "DEMO ONLY: root beak as %demo.", "DEMO ONLY: don't show doznec flapping.", "Prinrtf."
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Conflicts:
	urb/urbit.pill
	urb/zod/base/lib/drum.hoon
2015-06-15 18:10:02 -07:00

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cen % %cen

Pulling

The % runes pull ++arms and ++wings from the subject, often modifying their values. The % runes are similar to function calls, or execution tools. We use them to either compute some code with changes in the subject, or produce the output from a core.

There are two categories of % runes.

Pull with changes:

%= The natural % rune. Evaluates p with the changes specified in q.

%_ Evaluates p with the changes specified in q, then casts the product back to the type of p.

%* Evaluates p from a door q with changes r.Terminated by ==.


Pull the empty arm $, similar to calling a function:

%- slams a core with one argument.

%+ slams a core with two arguments.

%^ slams a core with three arguments.