1
0
mirror of https://github.com/ilyakooo0/urbit.git synced 2024-12-24 07:26:51 +03:00
urbit/base/pub/doc/hoon/runes/cn/cncl.md
2015-04-29 18:48:45 -04:00

56 lines
1.1 KiB
Markdown

[cencol, `%:`, %cncl](#cncl)
============================
Slam, one argument
`%:` is a synthetic rune that that [pull]()s [`$`]() from the [door]()
`p` with its sample set to `q`. `%:` in the most common case simply
[slam]()s `p` with `q`, similar to a function call with one argument.
Unlike its close relative `%-`, `%:` is designed for [gate]()s who take
a single value as their sample.
Produces
--------
Twig: `[%cncl p=twig q=twig]`
Sample
------
`p` is a [twig](), most commonly a [gate]() `q` is a [twig]()
Tall form
---------
%: p
q
Wide form
---------
%:(p q)
Irregular form
--------------
None
Examples
--------
/~zod/try=> %:(dec 42)
41
Here we use `%:` in its most straightforward form, to call an arm that
takes one argument.
/~zod/try=> %: dec
%+ add 2
%+ mul 2 20
41
Here we call [`++dec`]() with the sum of `2` and the product of `2` and
`20` using `%:`. As you can see, `%:` is most useful for code
organization, when you need to compute intermediate products for your
final result