@angular/core/esm2020/src/change_detection/change_detection_util.mjs

/**
 * @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 { getSymbolIterator } from '../util/symbol';
export function devModeEqual(a, b) {
    const isListLikeIterableA = isListLikeIterable(a);
    const isListLikeIterableB = isListLikeIterable(b);
    if (isListLikeIterableA && isListLikeIterableB) {
        return areIterablesEqual(a, b, devModeEqual);
    }
    else {
        const isAObject = a && (typeof a === 'object' || typeof a === 'function');
        const isBObject = b && (typeof b === 'object' || typeof b === 'function');
        if (!isListLikeIterableA && isAObject && !isListLikeIterableB && isBObject) {
            return true;
        }
        else {
            return Object.is(a, b);
        }
    }
}
export function isListLikeIterable(obj) {
    if (!isJsObject(obj))
        return false;
    return Array.isArray(obj) ||
        (!(obj instanceof Map) && // JS Map are iterables but return entries as [k, v]
            getSymbolIterator() in obj); // JS Iterable have a Symbol.iterator prop
}
export function areIterablesEqual(a, b, comparator) {
    const iterator1 = a[getSymbolIterator()]();
    const iterator2 = b[getSymbolIterator()]();
    while (true) {
        const item1 = iterator1.next();
        const item2 = iterator2.next();
        if (item1.done && item2.done)
            return true;
        if (item1.done || item2.done)
            return false;
        if (!comparator(item1.value, item2.value))
            return false;
    }
}
export function iterateListLike(obj, fn) {
    if (Array.isArray(obj)) {
        for (let i = 0; i < obj.length; i++) {
            fn(obj[i]);
        }
    }
    else {
        const iterator = obj[getSymbolIterator()]();
        let item;
        while (!((item = iterator.next()).done)) {
            fn(item.value);
        }
    }
}
export function isJsObject(o) {
    return o !== null && (typeof o === 'function' || typeof o === 'object');
}
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