@reactivex/ix-esnext-esm
Version:
The Interactive Extensions for JavaScript
1 lines • 2.7 kB
Source Map (JSON)
{"version":3,"sources":["iterable/operators/scan.ts"],"names":[],"mappings":"AAAA,OAAO,EAAE,SAAS,EAAE,MAAM,cAAc,CAAC;AAGzC,MAAM,OAAO,YAAmB,SAAQ,SAAY;IAMlD,YAAY,MAAmB,EAAE,EAAsC,EAAE,IAAS;QAChF,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,CAAC,CAAC,MAAM,CAAC,QAAQ,CAAC;QAChB,IAAI,CAAC,GAAG,CAAC,CAAC;QACV,IAAI,QAAQ,GAAG,KAAK,CAAC;QACrB,IAAI,GAAG,GAAG,IAAI,CAAC,KAAK,CAAC;QACrB,KAAK,MAAM,IAAI,IAAI,IAAI,CAAC,OAAO,EAAE;YAC/B,IAAI,QAAQ,IAAI,CAAC,QAAQ,GAAG,IAAI,CAAC,QAAQ,CAAC,EAAE;gBAC1C,GAAG,GAAG,IAAI,CAAC,GAAG,CAAI,GAAG,EAAE,IAAI,EAAE,CAAC,EAAE,CAAC,CAAC;gBAClC,MAAM,GAAG,CAAC;aACX;iBAAM;gBACL,GAAG,GAAG,IAAI,CAAC;gBACX,QAAQ,GAAG,IAAI,CAAC;gBAChB,CAAC,EAAE,CAAC;aACL;SACF;QACD,IAAI,CAAC,KAAK,CAAC,IAAI,CAAC,IAAI,CAAC,QAAQ,EAAE;YAC7B,MAAM,GAAQ,CAAC;SAChB;IACH,CAAC;CACF;AAUD,MAAM,UAAU,IAAI,CAClB,WAA2E,EAC3E,GAAG,IAAS;IAEZ,OAAO,SAAS,oBAAoB,CAAC,MAAmB;QACtD,OAAO,IAAI,YAAY,CAAC,MAAM,EAAE,WAAW,EAAE,IAAI,CAAC,CAAC;IACrD,CAAC,CAAC;AACJ,CAAC","file":"scan.js","sourcesContent":["import { IterableX } from '../iterablex';\nimport { OperatorFunction } from '../../interfaces';\n\nexport class ScanIterable<T, R> extends IterableX<R> {\n private _source: Iterable<T>;\n private _fn: (acc: R, x: T, index: number) => R;\n private _seed?: T | R;\n private _hasSeed: boolean;\n\n constructor(source: Iterable<T>, fn: (acc: R, x: T, index: number) => R, seed: R[]) {\n super();\n this._source = source;\n this._fn = fn;\n this._hasSeed = seed.length === 1;\n this._seed = seed[0];\n }\n\n *[Symbol.iterator]() {\n let i = 0;\n let hasValue = false;\n let acc = this._seed;\n for (const item of this._source) {\n if (hasValue || (hasValue = this._hasSeed)) {\n acc = this._fn(<R>acc, item, i++);\n yield acc;\n } else {\n acc = item;\n hasValue = true;\n i++;\n }\n }\n if (i === 1 && !this._hasSeed) {\n yield acc as R;\n }\n }\n}\n\nexport function scan<T, R = T>(\n accumulator: (previousValue: R, currentValue: T, currentIndex: number) => R,\n seed?: never[]\n): OperatorFunction<T, R>;\nexport function scan<T, R = T>(\n accumulator: (previousValue: R, currentValue: T, currentIndex: number) => R,\n seed?: R\n): OperatorFunction<T, R>;\nexport function scan<T, R = T>(\n accumulator: (previousValue: R, currentValue: T, currentIndex: number) => R,\n ...seed: R[]\n): OperatorFunction<T, R> {\n return function scanOperatorFunction(source: Iterable<T>): IterableX<R> {\n return new ScanIterable(source, accumulator, seed);\n };\n}\n"]}