790af3842c
updates updates updates updates updates updates better updates array of updates updates updates updates Signed-off-by: Jess Frazelle <github@jessfraz.com>
48 lines
38 KiB
Markdown
48 lines
38 KiB
Markdown
---
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title: "arrayReduce"
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excerpt: "Take a starting value. Then, for each element of an array, calculate the next value,"
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layout: manual
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---
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Take a starting value. Then, for each element of an array, calculate the next value,
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using the previous value and the element.
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```js
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arrayReduce(array: [u64], start: Sketch, reduce_fn: FunctionParam) -> Sketch
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```
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### Arguments
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| Name | Type | Description | Required |
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|----------|------|-------------|----------|
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| `array` | `[u64]` | | Yes |
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| `start` | [`Sketch`](/docs/kcl/types/Sketch) | A sketch is a collection of paths. | Yes |
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| `reduce_fn` | `FunctionParam` | | Yes |
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### Returns
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[`Sketch`](/docs/kcl/types/Sketch) - A sketch is a collection of paths.
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### Examples
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```js
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fn decagon = (radius) => {
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let step = 1 / 10 * tau()
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let sketch001 = startSketchAt([cos(0) * radius, sin(0) * radius])
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return arrayReduce([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], sketch001, (i, sg) => {
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let x = cos(step * i) * radius
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let y = sin(step * i) * radius
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return lineTo([x, y], sg)
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})
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}
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decagon(5.0)
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|> close(%)
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```
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