mirror of
https://github.com/ilyakooo0/urbit.git
synced 2024-12-26 00:12:28 +03:00
72 lines
1.4 KiB
Markdown
72 lines
1.4 KiB
Markdown
|
[centis, `%=`, %cnts](#cnts)
|
||
|
|
============================
|
||
|
|
|
||
|
|
Evaluate with changes
|
||
|
|
|
||
|
|
`%=` is a natural hoon thatevaluates `p` with the changes specified in
|
||
|
|
`q`. `%=` is used to change a batch of [wing]()s inside a [`++wing`]()
|
||
|
|
all at once, ensuring that the product is type checked.
|
||
|
|
|
||
|
|
See also
|
||
|
|
--------
|
||
|
|
|
||
|
|
`%_`
|
||
|
|
|
||
|
|
Produces
|
||
|
|
--------
|
||
|
|
|
||
|
|
Twig: `[%cnts p=wing q=tram]`
|
||
|
|
|
||
|
|
Sample
|
||
|
|
------
|
||
|
|
|
||
|
|
`p` is a [++wing](). `q` is a [++tram]().
|
||
|
|
|
||
|
|
Tall form
|
||
|
|
---------
|
||
|
|
|
||
|
|
%= p
|
||
|
|
p.i.q q.i.q
|
||
|
|
p.i.t.q q.i.t.q
|
||
|
|
==
|
||
|
|
|
||
|
|
Wide form
|
||
|
|
---------
|
||
|
|
|
||
|
|
%=(p p.i.q q.i.q, p.i.t.q q.i.t.q)
|
||
|
|
|
||
|
|
Irregular form
|
||
|
|
--------------
|
||
|
|
|
||
|
|
p(p.i.q q.i.q, p.i.t.q q.i.t.q)
|
||
|
|
|
||
|
|
Examples
|
||
|
|
--------
|
||
|
|
|
||
|
|
/~zod/try=> =+ a=[p=5 q=6]
|
||
|
|
a(p 2)
|
||
|
|
[p=2 q=6]
|
||
|
|
|
||
|
|
In this example we are using the irregular form of `%=` to replace `p`
|
||
|
|
in `a`.
|
||
|
|
|
||
|
|
/~zod/try=> =+ a=[p=1 q=2 r=3 s=4]
|
||
|
|
a(p 5, q 6, r 7, s 8)
|
||
|
|
[p=5 q=6 r=7 s=8]
|
||
|
|
|
||
|
|
Here we show how you can replace multiple faces at once. We start with a
|
||
|
|
new `a` and replace all of its values with the irregular form of `%=`.
|
||
|
|
|
||
|
|
/~zod/try=> =+ step=0
|
||
|
|
=+ leng=10
|
||
|
|
=+ valu=0
|
||
|
|
|-
|
||
|
|
?: =(step leng)
|
||
|
|
valu
|
||
|
|
$(valu (mul 2 valu), step +(step))
|
||
|
|
1.024
|
||
|
|
|
||
|
|
In this case we create a simple loop, using [`|-`](). To recurse, we use
|
||
|
|
`%=` with [`$`](), the empty name — our `|-` — replacing our `valu` with
|
||
|
|
`(mul 2 valu)` and `step` with `+(step)`.
|