shrub/pub/doc/hoon/runes/cn.md

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 ==.

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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.

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