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ssv445

Lorem Ipsum MCP Server

by ssv445
random.js1.84 kB
import * as Chunk from "../Chunk.js"; import * as Context from "../Context.js"; import { pipe } from "../Function.js"; import * as Hash from "../Hash.js"; import * as PCGRandom from "../Utils.js"; import * as core from "./core.js"; /** @internal */ const RandomSymbolKey = "effect/Random"; /** @internal */ export const RandomTypeId = /*#__PURE__*/Symbol.for(RandomSymbolKey); /** @internal */ export const randomTag = /*#__PURE__*/Context.GenericTag("effect/Random"); /** @internal */ class RandomImpl { seed; [RandomTypeId] = RandomTypeId; PRNG; constructor(seed) { this.seed = seed; this.PRNG = new PCGRandom.PCGRandom(seed); } get next() { return core.sync(() => this.PRNG.number()); } get nextBoolean() { return core.map(this.next, n => n > 0.5); } get nextInt() { return core.sync(() => this.PRNG.integer(Number.MAX_SAFE_INTEGER)); } nextRange(min, max) { return core.map(this.next, n => (max - min) * n + min); } nextIntBetween(min, max) { return core.sync(() => this.PRNG.integer(max - min) + min); } shuffle(elements) { return shuffleWith(elements, n => this.nextIntBetween(0, n)); } } const shuffleWith = (elements, nextIntBounded) => { return core.suspend(() => pipe(core.sync(() => Array.from(elements)), core.flatMap(buffer => { const numbers = []; for (let i = buffer.length; i >= 2; i = i - 1) { numbers.push(i); } return pipe(numbers, core.forEachSequentialDiscard(n => pipe(nextIntBounded(n), core.map(k => swap(buffer, n - 1, k)))), core.as(Chunk.fromIterable(buffer))); }))); }; const swap = (buffer, index1, index2) => { const tmp = buffer[index1]; buffer[index1] = buffer[index2]; buffer[index2] = tmp; return buffer; }; export const make = seed => new RandomImpl(Hash.hash(seed)); //# sourceMappingURL=random.js.map

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