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Chop chop (#1078)

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* failing test

* support chopping chops
This commit is contained in:
Alex McLean 2024-06-24 17:19:22 +01:00 committed by GitHub
parent 283a071c86
commit a4bd0ae100
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2 changed files with 12 additions and 1 deletions
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10
packages/core/pattern.mjs
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@ -2804,8 +2804,16 @@ export const s_tour = function (pat, ...many) {
export const chop = register('chop', function (n, pat) {
const slices = Array.from({ length: n }, (x, i) => i);
const slice_objects = slices.map((i) => ({ begin: i / n, end: (i + 1) / n }));
const merge = function (a, b) {
if ('begin' in a && 'end' in a && a.begin !== undefined && a.end !== undefined) {
const d = a.end - a.begin;
b = { begin: a.begin + b.begin * d, end: a.begin + b.end * d };
}
// return a;
return Object.assign({}, a, b);
};
const func = function (o) {
return sequence(slice_objects.map((slice_o) => Object.assign({}, o, slice_o)));
return sequence(slice_objects.map((slice_o) => merge(o, slice_o)));
};
return pat.squeezeBind(func).setTactus(__tactus ? Fraction(n).mulmaybe(pat.tactus) : undefined);
});

3
packages/core/test/pattern.test.mjs
View File

@ -937,6 +937,9 @@ describe('Pattern', () => {
.firstCycle(),
);
});
it('Can chop chops', () => {
expect(pure({ s: 'bev' }).chop(2).chop(2).firstCycle()).toStrictEqual(pure({ s: 'bev' }).chop(4).firstCycle());
});
});
describe('range', () => {
it('Can be patterned', () => {