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This reverts commit 8e1e40d75b3ab15c194b6bf9570f3edc46e2de58. This reverts commit f073c490f9fd7c5abc033af4857df92229877de7. This reverts commit f187d2d7e01a54823f3e979af9bbd148b398e7e9. This reverts commit bc272862a73cfce1b118586ca39d3a377d841f1b. This reverts commit 30a397513f8890a3406dc7ab91c6e067e3bbfbbb. This reverts commit 4fc6856fb50d88c20a0f533392ca606641c5f38f. Conflicts: urb/urbit.pill urb/zod/base/lib/drum.hoon
72 lines
1.4 KiB
Markdown
72 lines
1.4 KiB
Markdown
[centis, `%=`, %cnts](#cnts)
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============================
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Evaluate with changes
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`%=` is a natural hoon thatevaluates `p` with the changes specified in
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`q`. `%=` is used to change a batch of [wing]()s inside a [`++wing`]()
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all at once, ensuring that the product is type checked.
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See also
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--------
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`%_`
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Produces
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--------
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Twig: `[%cnts p=wing q=tram]`
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Sample
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------
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`p` is a [++wing](). `q` is a [++tram]().
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Tall form
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---------
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%= p
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p.i.q q.i.q
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p.i.t.q q.i.t.q
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==
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Wide form
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---------
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%=(p p.i.q q.i.q, p.i.t.q q.i.t.q)
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Irregular form
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--------------
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p(p.i.q q.i.q, p.i.t.q q.i.t.q)
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Examples
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--------
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/~zod/try=> =+ a=[p=5 q=6]
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a(p 2)
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[p=2 q=6]
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In this example we are using the irregular form of `%=` to replace `p`
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in `a`.
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/~zod/try=> =+ a=[p=1 q=2 r=3 s=4]
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a(p 5, q 6, r 7, s 8)
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[p=5 q=6 r=7 s=8]
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Here we show how you can replace multiple faces at once. We start with a
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new `a` and replace all of its values with the irregular form of `%=`.
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/~zod/try=> =+ step=0
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=+ leng=10
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=+ valu=0
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|-
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?: =(step leng)
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valu
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$(valu (mul 2 valu), step +(step))
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1.024
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In this case we create a simple loop, using [`|-`](). To recurse, we use
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`%=` with [`$`](), the empty name — our `|-` — replacing our `valu` with
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`(mul 2 valu)` and `step` with `+(step)`.
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