initial commit: scaffolding

1 files changed, 62 insertions, 0 deletions

diff --git a/node_modules/rxjs/dist/esm/internal/observable/combineLatest.js b/node_modules/rxjs/dist/esm/internal/observable/combineLatest.js
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+++ b/node_modules/rxjs/dist/esm/internal/observable/combineLatest.js
@@ -0,0 +1,62 @@
+import { Observable } from '../Observable';
+import { argsArgArrayOrObject } from '../util/argsArgArrayOrObject';
+import { from } from './from';
+import { identity } from '../util/identity';
+import { mapOneOrManyArgs } from '../util/mapOneOrManyArgs';
+import { popResultSelector, popScheduler } from '../util/args';
+import { createObject } from '../util/createObject';
+import { createOperatorSubscriber } from '../operators/OperatorSubscriber';
+import { executeSchedule } from '../util/executeSchedule';
+export function combineLatest(...args) {
+    const scheduler = popScheduler(args);
+    const resultSelector = popResultSelector(args);
+    const { args: observables, keys } = argsArgArrayOrObject(args);
+    if (observables.length === 0) {
+        return from([], scheduler);
+    }
+    const result = new Observable(combineLatestInit(observables, scheduler, keys
+        ?
+            (values) => createObject(keys, values)
+        :
+            identity));
+    return resultSelector ? result.pipe(mapOneOrManyArgs(resultSelector)) : result;
+}
+export function combineLatestInit(observables, scheduler, valueTransform = identity) {
+    return (subscriber) => {
+        maybeSchedule(scheduler, () => {
+            const { length } = observables;
+            const values = new Array(length);
+            let active = length;
+            let remainingFirstValues = length;
+            for (let i = 0; i < length; i++) {
+                maybeSchedule(scheduler, () => {
+                    const source = from(observables[i], scheduler);
+                    let hasFirstValue = false;
+                    source.subscribe(createOperatorSubscriber(subscriber, (value) => {
+                        values[i] = value;
+                        if (!hasFirstValue) {
+                            hasFirstValue = true;
+                            remainingFirstValues--;
+                        }
+                        if (!remainingFirstValues) {
+                            subscriber.next(valueTransform(values.slice()));
+                        }
+                    }, () => {
+                        if (!--active) {
+                            subscriber.complete();
+                        }
+                    }));
+                }, subscriber);
+            }
+        }, subscriber);
+    };
+}
+function maybeSchedule(scheduler, execute, subscription) {
+    if (scheduler) {
+        executeSchedule(subscription, scheduler, execute);
+    }
+    else {
+        execute();
+    }
+}
+//# sourceMappingURL=combineLatest.js.map
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