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/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
import { ɵisPromise as isPromise } from '@angular/core';
import { from, isObservable, of } from 'rxjs';
export function shallowEqualArrays(a, b) {
    if (a.length !== b.length)
        return false;
    for (let i = 0; i < a.length; ++i) {
        if (!shallowEqual(a[i], b[i]))
            return false;
    }
    return true;
}
export function shallowEqual(a, b) {
    // While `undefined` should never be possible, it would sometimes be the case in IE 11
    // and pre-chromium Edge. The check below accounts for this edge case.
    const k1 = a ? getDataKeys(a) : undefined;
    const k2 = b ? getDataKeys(b) : undefined;
    if (!k1 || !k2 || k1.length != k2.length) {
        return false;
    }
    let key;
    for (let i = 0; i < k1.length; i++) {
        key = k1[i];
        if (!equalArraysOrString(a[key], b[key])) {
            return false;
        }
    }
    return true;
}
/**
 * Gets the keys of an object, including `symbol` keys.
 */
export function getDataKeys(obj) {
    return [...Object.keys(obj), ...Object.getOwnPropertySymbols(obj)];
}
/**
 * Test equality for arrays of strings or a string.
 */
export function equalArraysOrString(a, b) {
    if (Array.isArray(a) && Array.isArray(b)) {
        if (a.length !== b.length)
            return false;
        const aSorted = [...a].sort();
        const bSorted = [...b].sort();
        return aSorted.every((val, index) => bSorted[index] === val);
    }
    else {
        return a === b;
    }
}
/**
 * Return the last element of an array.
 */
export function last(a) {
    return a.length > 0 ? a[a.length - 1] : null;
}
export function wrapIntoObservable(value) {
    if (isObservable(value)) {
        return value;
    }
    if (isPromise(value)) {
        // Use `Promise.resolve()` to wrap promise-like instances.
        // Required ie when a Resolver returns a AngularJS `$q` promise to correctly trigger the
        // change detection.
        return from(Promise.resolve(value));
    }
    return of(value);
}
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