92 lines
4.5 KiB
JavaScript
92 lines
4.5 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.shuffle = exports.nextRange = exports.nextIntBetween = exports.nextInt = exports.nextBoolean = exports.next = exports.live = exports.Tag = exports.TRandomTypeId = void 0;
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var Context = _interopRequireWildcard(require("../../Context.js"));
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var _Function = require("../../Function.js");
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var Layer = _interopRequireWildcard(require("../../Layer.js"));
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var Random = _interopRequireWildcard(require("../../Utils.js"));
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var core = _interopRequireWildcard(require("./core.js"));
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var stm = _interopRequireWildcard(require("./stm.js"));
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var tArray = _interopRequireWildcard(require("./tArray.js"));
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var tRef = _interopRequireWildcard(require("./tRef.js"));
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function _interopRequireWildcard(e, t) { if ("function" == typeof WeakMap) var r = new WeakMap(), n = new WeakMap(); return (_interopRequireWildcard = function (e, t) { if (!t && e && e.__esModule) return e; var o, i, f = { __proto__: null, default: e }; if (null === e || "object" != typeof e && "function" != typeof e) return f; if (o = t ? n : r) { if (o.has(e)) return o.get(e); o.set(e, f); } for (const t in e) "default" !== t && {}.hasOwnProperty.call(e, t) && ((i = (o = Object.defineProperty) && Object.getOwnPropertyDescriptor(e, t)) && (i.get || i.set) ? o(f, t, i) : f[t] = e[t]); return f; })(e, t); }
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const TRandomSymbolKey = "effect/TRandom";
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/** @internal */
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const TRandomTypeId = exports.TRandomTypeId = /*#__PURE__*/Symbol.for(TRandomSymbolKey);
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const randomInteger = state => {
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const prng = new Random.PCGRandom();
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prng.setState(state);
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return [prng.integer(0), prng.getState()];
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};
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const randomIntegerBetween = (low, high) => {
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return state => {
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const prng = new Random.PCGRandom();
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prng.setState(state);
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return [prng.integer(high - low) + low, prng.getState()];
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};
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};
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const randomNumber = state => {
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const prng = new Random.PCGRandom();
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prng.setState(state);
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return [prng.number(), prng.getState()];
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};
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const withState = (state, f) => {
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return (0, _Function.pipe)(state, tRef.modify(f));
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};
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const shuffleWith = (iterable, nextIntBounded) => {
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const swap = (buffer, index1, index2) => (0, _Function.pipe)(buffer, tArray.get(index1), core.flatMap(tmp => (0, _Function.pipe)(buffer, tArray.updateSTM(index1, () => (0, _Function.pipe)(buffer, tArray.get(index2))), core.zipRight((0, _Function.pipe)(buffer, tArray.update(index2, () => tmp))))));
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return (0, _Function.pipe)(tArray.fromIterable(iterable), core.flatMap(buffer => {
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const array = [];
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for (let i = array.length; i >= 2; i = i - 1) {
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array.push(i);
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}
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return (0, _Function.pipe)(array, stm.forEach(n => (0, _Function.pipe)(nextIntBounded(n), core.flatMap(k => swap(buffer, n - 1, k))), {
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discard: true
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}), core.zipRight(tArray.toArray(buffer)));
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}));
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};
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/** @internal */
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const Tag = exports.Tag = /*#__PURE__*/Context.GenericTag("effect/TRandom");
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class TRandomImpl {
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state;
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[TRandomTypeId] = TRandomTypeId;
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constructor(state) {
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this.state = state;
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this.next = withState(this.state, randomNumber);
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this.nextBoolean = core.flatMap(this.next, n => core.succeed(n > 0.5));
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this.nextInt = withState(this.state, randomInteger);
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}
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next;
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nextBoolean;
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nextInt;
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nextRange(min, max) {
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return core.flatMap(this.next, n => core.succeed((max - min) * n + min));
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}
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nextIntBetween(low, high) {
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return withState(this.state, randomIntegerBetween(low, high));
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}
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shuffle(elements) {
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return shuffleWith(elements, n => this.nextIntBetween(0, n));
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}
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}
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/** @internal */
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const live = exports.live = /*#__PURE__*/Layer.effect(Tag, /*#__PURE__*/(0, _Function.pipe)(/*#__PURE__*/tRef.make(/*#__PURE__*/new Random.PCGRandom(Math.random() * 4294967296 >>> 0).getState()), /*#__PURE__*/core.map(seed => new TRandomImpl(seed)), core.commit));
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/** @internal */
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const next = exports.next = /*#__PURE__*/core.flatMap(Tag, random => random.next);
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/** @internal */
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const nextBoolean = exports.nextBoolean = /*#__PURE__*/core.flatMap(Tag, random => random.nextBoolean);
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/** @internal */
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const nextInt = exports.nextInt = /*#__PURE__*/core.flatMap(Tag, random => random.nextInt);
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/** @internal */
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const nextIntBetween = (low, high) => core.flatMap(Tag, random => random.nextIntBetween(low, high));
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/** @internal */
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exports.nextIntBetween = nextIntBetween;
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const nextRange = (min, max) => core.flatMap(Tag, random => random.nextRange(min, max));
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/** @internal */
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exports.nextRange = nextRange;
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const shuffle = elements => core.flatMap(Tag, random => random.shuffle(elements));
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exports.shuffle = shuffle;
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//# sourceMappingURL=tRandom.js.map
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