mirror of https://github.com/waku-org/js-waku.git
chore: move `random_subset.ts` to `@waku/utils` (#1191)
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@ -1,4 +1,4 @@
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import { getPseudoRandomSubset } from "./random_subset.js";
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import { getPseudoRandomSubset } from "@waku/utils";
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export const DefaultWantedNumber = 1;
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@ -1,7 +1,6 @@
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import { getPseudoRandomSubset } from "@waku/utils";
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import { expect } from "chai";
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import { getPseudoRandomSubset } from "./random_subset.js";
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describe("Discovery", () => {
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it("returns all values when wanted number matches available values", function () {
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const values = ["a", "b", "c"];
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@ -1,30 +0,0 @@
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/**
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* Return pseudo random subset of the input.
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*/
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export function getPseudoRandomSubset<T>(
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values: T[],
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wantedNumber: number
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): T[] {
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if (values.length <= wantedNumber || values.length <= 1) {
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return values;
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}
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return shuffle(values).slice(0, wantedNumber);
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}
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function shuffle<T>(arr: T[]): T[] {
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if (arr.length <= 1) {
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return arr;
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}
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const randInt = (): number => {
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return Math.floor(Math.random() * Math.floor(arr.length));
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};
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for (let i = 0; i < arr.length; i++) {
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const j = randInt();
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const tmp = arr[i];
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arr[i] = arr[j];
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arr[j] = tmp;
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}
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return arr;
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}
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@ -0,0 +1 @@
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export * from "./random_subset.js";
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@ -1,2 +1,3 @@
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export * from "./bytes/index.js";
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export * from "./libp2p/index.js";
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export * from "./common/index.js";
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