| 1 | {"version":3,"sources":["asynciterable/scanright.ts"],"names":[],"mappings":"AAAA,OAAO,EAAE,cAAc,EAAE,MAAM,kBAAkB,CAAC;AAClD,OAAO,EAAE,OAAO,EAAE,MAAM,WAAW,CAAC;AAEpC,MAAM,OAAO,sBAA6B,SAAQ,cAAiB;IAMjE,YACE,MAAwB,EACxB,EAAmD,EACnD,IAAS;QAET,KAAK,EAAE,CAAC;QACR,IAAI,CAAC,OAAO,GAAG,MAAM,CAAC;QACtB,IAAI,CAAC,GAAG,GAAG,EAAE,CAAC;QACd,IAAI,CAAC,QAAQ,GAAG,IAAI,CAAC,MAAM,KAAK,CAAC,CAAC;QAClC,IAAI,CAAC,KAAK,GAAG,IAAI,CAAC,CAAC,CAAC,CAAC;IACvB,CAAC;IAED,KAAK,CAAC,CAAC,CAAC,MAAM,CAAC,aAAa,CAAC;QAC3B,IAAI,QAAQ,GAAG,KAAK,EAClB,GAAG,GAAG,IAAI,CAAC,KAAK,CAAC;QACnB,MAAM,MAAM,GAAG,MAAM,OAAO,CAAC,IAAI,CAAC,OAAO,CAAC,CAAC;QAC3C,KAAK,IAAI,MAAM,GAAG,MAAM,CAAC,MAAM,GAAG,CAAC,EAAE,MAAM,IAAI,CAAC,EAAE,MAAM,EAAE,EAAE;YAC1D,MAAM,IAAI,GAAG,MAAM,CAAC,MAAM,CAAC,CAAC;YAC5B,IAAI,QAAQ,IAAI,CAAC,QAAQ,GAAG,IAAI,CAAC,QAAQ,CAAC,EAAE;gBAC1C,GAAG,GAAG,MAAM,IAAI,CAAC,GAAG,CAAI,GAAG,EAAE,IAAI,EAAE,MAAM,CAAC,CAAC;gBAC3C,MAAM,GAAG,CAAC;aACX;iBAAM;gBACL,GAAG,GAAG,IAAI,CAAC;gBACX,QAAQ,GAAG,IAAI,CAAC;aACjB;SACF;IACH,CAAC;CACF;AAYD,MAAM,UAAU,SAAS,CACvB,MAAwB,EACxB,WAAwF,EACxF,GAAG,IAAS;IAEZ,OAAO,IAAI,sBAAsB,CAAC,MAAM,EAAE,WAAW,EAAE,IAAI,CAAC,CAAC;AAC/D,CAAC","file":"scanright.js","sourcesContent":["import { AsyncIterableX } from './asynciterablex';\nimport { toArray } from './toarray';\n\nexport class ScanRightAsyncIterable<T, R> extends AsyncIterableX<R> {\n private _source: AsyncIterable<T>;\n private _fn: (acc: R, x: T, index: number) => R | Promise<R>;\n private _seed?: T | R;\n private _hasSeed: boolean;\n\n constructor(\n source: AsyncIterable<T>,\n fn: (acc: R, x: T, index: number) => R | Promise<R>,\n seed: R[]\n ) {\n super();\n this._source = source;\n this._fn = fn;\n this._hasSeed = seed.length === 1;\n this._seed = seed[0];\n }\n\n async *[Symbol.asyncIterator]() {\n let hasValue = false,\n acc = this._seed;\n const source = await toArray(this._source);\n for (let offset = source.length - 1; offset >= 0; offset--) {\n const item = source[offset];\n if (hasValue || (hasValue = this._hasSeed)) {\n acc = await this._fn(<R>acc, item, offset);\n yield acc;\n } else {\n acc = item;\n hasValue = true;\n }\n }\n }\n}\n\nexport function scanRight<T, R = T>(\n source: AsyncIterable<T>,\n accumulator: (previousValue: R, currentValue: T, currentIndex: number) => R | Promise<R>,\n seed?: never[]\n): AsyncIterableX<R>;\nexport function scanRight<T, R = T>(\n source: AsyncIterable<T>,\n accumulator: (previousValue: R, currentValue: T, currentIndex: number) => R | Promise<R>,\n seed?: R\n): AsyncIterableX<R>;\nexport function scanRight<T, R = T>(\n source: AsyncIterable<T>,\n accumulator: (previousValue: R, currentValue: T, currentIndex: number) => R | Promise<R>,\n ...seed: R[]\n): AsyncIterableX<R> {\n return new ScanRightAsyncIterable(source, accumulator, seed);\n}\n"]} |