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4.5 KiB
{"version":3,"file":"map.js","sourceRoot":"","sources":["../../src/operators/map.ts"],"names":[],"mappings":";;;;;;AACA,2BAA2B,eAAe,CAAC,CAAA;AAI3C;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;GAgCG;AACH,aAA0B,OAAuC,EAAE,OAAa;IAC9E,MAAM,CAAC,sBAAsB,MAAqB;QAChD,EAAE,CAAC,CAAC,OAAO,OAAO,KAAK,UAAU,CAAC,CAAC,CAAC;YAClC,MAAM,IAAI,SAAS,CAAC,4DAA4D,CAAC,CAAC;QACpF,CAAC;QACD,MAAM,CAAC,MAAM,CAAC,IAAI,CAAC,IAAI,WAAW,CAAC,OAAO,EAAE,OAAO,CAAC,CAAC,CAAC;IACxD,CAAC,CAAC;AACJ,CAAC;AAPe,WAAG,MAOlB,CAAA;AAED;IACE,qBAAoB,OAAuC,EAAU,OAAY;QAA7D,YAAO,GAAP,OAAO,CAAgC;QAAU,YAAO,GAAP,OAAO,CAAK;IACjF,CAAC;IAED,0BAAI,GAAJ,UAAK,UAAyB,EAAE,MAAW;QACzC,MAAM,CAAC,MAAM,CAAC,SAAS,CAAC,IAAI,aAAa,CAAC,UAAU,EAAE,IAAI,CAAC,OAAO,EAAE,IAAI,CAAC,OAAO,CAAC,CAAC,CAAC;IACrF,CAAC;IACH,kBAAC;AAAD,CAAC,AAPD,IAOC;AAPY,mBAAW,cAOvB,CAAA;AAED;;;;GAIG;AACH;IAAkC,iCAAa;IAI7C,uBAAY,WAA0B,EAClB,OAAuC,EAC/C,OAAY;QACtB,kBAAM,WAAW,CAAC,CAAC;QAFD,YAAO,GAAP,OAAO,CAAgC;QAJ3D,UAAK,GAAW,CAAC,CAAC;QAOhB,IAAI,CAAC,OAAO,GAAG,OAAO,IAAI,IAAI,CAAC;IACjC,CAAC;IAED,mEAAmE;IACnE,iCAAiC;IACvB,6BAAK,GAAf,UAAgB,KAAQ;QACtB,IAAI,MAAW,CAAC;QAChB,IAAI,CAAC;YACH,MAAM,GAAG,IAAI,CAAC,OAAO,CAAC,IAAI,CAAC,IAAI,CAAC,OAAO,EAAE,KAAK,EAAE,IAAI,CAAC,KAAK,EAAE,CAAC,CAAC;QAChE,CAAE;QAAA,KAAK,CAAC,CAAC,GAAG,CAAC,CAAC,CAAC;YACb,IAAI,CAAC,WAAW,CAAC,KAAK,CAAC,GAAG,CAAC,CAAC;YAC5B,MAAM,CAAC;QACT,CAAC;QACD,IAAI,CAAC,WAAW,CAAC,IAAI,CAAC,MAAM,CAAC,CAAC;IAChC,CAAC;IACH,oBAAC;AAAD,CAAC,AAvBD,CAAkC,uBAAU,GAuB3C","sourcesContent":["import { Operator } from '../Operator';\nimport { Subscriber } from '../Subscriber';\nimport { Observable } from '../Observable';\nimport { OperatorFunction } from '../interfaces';\n\n/**\n * Applies a given `project` function to each value emitted by the source\n * Observable, and emits the resulting values as an Observable.\n *\n * <span class=\"informal\">Like [Array.prototype.map()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map),\n * it passes each source value through a transformation function to get\n * corresponding output values.</span>\n *\n * <img src=\"./img/map.png\" width=\"100%\">\n *\n * Similar to the well known `Array.prototype.map` function, this operator\n * applies a projection to each value and emits that projection in the output\n * Observable.\n *\n * @example <caption>Map every click to the clientX position of that click</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var positions = clicks.map(ev => ev.clientX);\n * positions.subscribe(x => console.log(x));\n *\n * @see {@link mapTo}\n * @see {@link pluck}\n *\n * @param {function(value: T, index: number): R} project The function to apply\n * to each `value` emitted by the source Observable. The `index` parameter is\n * the number `i` for the i-th emission that has happened since the\n * subscription, starting from the number `0`.\n * @param {any} [thisArg] An optional argument to define what `this` is in the\n * `project` function.\n * @return {Observable<R>} An Observable that emits the values from the source\n * Observable transformed by the given `project` function.\n * @method map\n * @owner Observable\n */\nexport function map<T, R>(project: (value: T, index: number) => R, thisArg?: any): OperatorFunction<T, R> {\n return function mapOperation(source: Observable<T>): Observable<R> {\n if (typeof project !== 'function') {\n throw new TypeError('argument is not a function. Are you looking for `mapTo()`?');\n }\n return source.lift(new MapOperator(project, thisArg));\n };\n}\n\nexport class MapOperator<T, R> implements Operator<T, R> {\n constructor(private project: (value: T, index: number) => R, private thisArg: any) {\n }\n\n call(subscriber: Subscriber<R>, source: any): any {\n return source.subscribe(new MapSubscriber(subscriber, this.project, this.thisArg));\n }\n}\n\n/**\n * We need this JSDoc comment for affecting ESDoc.\n * @ignore\n * @extends {Ignored}\n */\nclass MapSubscriber<T, R> extends Subscriber<T> {\n count: number = 0;\n private thisArg: any;\n\n constructor(destination: Subscriber<R>,\n private project: (value: T, index: number) => R,\n thisArg: any) {\n super(destination);\n this.thisArg = thisArg || this;\n }\n\n // NOTE: This looks unoptimized, but it's actually purposefully NOT\n // using try/catch optimizations.\n protected _next(value: T) {\n let result: any;\n try {\n result = this.project.call(this.thisArg, value, this.count++);\n } catch (err) {\n this.destination.error(err);\n return;\n }\n this.destination.next(result);\n }\n}\n"]} |