source: trip-planner-front/node_modules/@angular/router/esm2015/src/utils/collection.js@ 76712b2

/**
 * @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 { ɵisObservable as isObservable, ɵisPromise as isPromise } from '@angular/core';
import { from, 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 ? Object.keys(a) : undefined;
    const k2 = b ? Object.keys(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;
}
/**
 * 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;
    }
}
/**
 * Flattens single-level nested arrays.
 */
export function flatten(arr) {
    return Array.prototype.concat.apply([], arr);
}
/**
 * Return the last element of an array.
 */
export function last(a) {
    return a.length > 0 ? a[a.length - 1] : null;
}
/**
 * Verifys all booleans in an array are `true`.
 */
export function and(bools) {
    return !bools.some(v => !v);
}
export function forEach(map, callback) {
    for (const prop in map) {
        if (map.hasOwnProperty(prop)) {
            callback(map[prop], prop);
        }
    }
}
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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