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- {"ast":null,"code":"import { OuterSubscriber } from '../OuterSubscriber';\nimport { subscribeToResult } from '../util/subscribeToResult';\nexport function withLatestFrom(...args) {\n return source => {\n let project;\n if (typeof args[args.length - 1] === 'function') {\n project = args.pop();\n }\n const observables = args;\n return source.lift(new WithLatestFromOperator(observables, project));\n };\n}\nclass WithLatestFromOperator {\n constructor(observables, project) {\n this.observables = observables;\n this.project = project;\n }\n call(subscriber, source) {\n return source.subscribe(new WithLatestFromSubscriber(subscriber, this.observables, this.project));\n }\n}\nclass WithLatestFromSubscriber extends OuterSubscriber {\n constructor(destination, observables, project) {\n super(destination);\n this.observables = observables;\n this.project = project;\n this.toRespond = [];\n const len = observables.length;\n this.values = new Array(len);\n for (let i = 0; i < len; i++) {\n this.toRespond.push(i);\n }\n for (let i = 0; i < len; i++) {\n let observable = observables[i];\n this.add(subscribeToResult(this, observable, observable, i));\n }\n }\n notifyNext(outerValue, innerValue, outerIndex, innerIndex, innerSub) {\n this.values[outerIndex] = innerValue;\n const toRespond = this.toRespond;\n if (toRespond.length > 0) {\n const found = toRespond.indexOf(outerIndex);\n if (found !== -1) {\n toRespond.splice(found, 1);\n }\n }\n }\n notifyComplete() {}\n _next(value) {\n if (this.toRespond.length === 0) {\n const args = [value, ...this.values];\n if (this.project) {\n this._tryProject(args);\n } else {\n this.destination.next(args);\n }\n }\n }\n _tryProject(args) {\n let result;\n try {\n result = this.project.apply(this, args);\n } catch (err) {\n this.destination.error(err);\n return;\n }\n this.destination.next(result);\n }\n}\n//# sourceMappingURL=withLatestFrom.js.map","map":null,"metadata":{},"sourceType":"module","externalDependencies":[]}
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