38 lines
1.1 KiB
JavaScript
38 lines
1.1 KiB
JavaScript
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import { Subscriber } from '../Subscriber';
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export function map(project, thisArg) {
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return function mapOperation(source) {
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if (typeof project !== 'function') {
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throw new TypeError('argument is not a function. Are you looking for `mapTo()`?');
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}
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return source.lift(new MapOperator(project, thisArg));
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};
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}
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export class MapOperator {
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constructor(project, thisArg) {
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this.project = project;
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this.thisArg = thisArg;
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}
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call(subscriber, source) {
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return source.subscribe(new MapSubscriber(subscriber, this.project, this.thisArg));
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}
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}
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class MapSubscriber extends Subscriber {
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constructor(destination, project, thisArg) {
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super(destination);
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this.project = project;
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this.count = 0;
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this.thisArg = thisArg || this;
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}
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_next(value) {
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let result;
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try {
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result = this.project.call(this.thisArg, value, this.count++);
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}
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catch (err) {
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this.destination.error(err);
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return;
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}
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this.destination.next(result);
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}
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}
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//# sourceMappingURL=map.js.map
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