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// Repeats each item in a list in-place by a corresponding length.
import {input, templateCompositeFrom} from '#composite';
import {repeat, stitchArrays} from '#sugar';
import {isNumber, validateArrayItems} from '#validators';
export default templateCompositeFrom({
annotation: `withStretchedList`,
inputs: {
list: input({type: 'array'}),
lengths: input({
validate: validateArrayItems(isNumber),
}),
},
outputs: ['#stretchedList'],
steps: () => [
{
dependencies: [input('list'), input('lengths')],
compute: (continuation, {
[input('list')]: list,
[input('lengths')]: lengths,
}) => continuation({
['#stretchedList']:
stitchArrays({
item: list,
length: lengths,
}).map(({item, length}) => repeat(length, [item]))
.flat(),
}),
},
],
});
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