@tsdotnet/collection-base/dist-esm/ReadOnlyCollectionBase.js

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/*!
 * @author electricessence / https://github.com/electricessence/
 * @license MIT
 */
import areEqual from '@tsdotnet/compare/dist/areEqual';
import IterableCollectionBase from './IterableCollectionBase';
/**
 * Base class for implementing an internally modifiable, eternally read-only collection.
 */
export default class ReadOnlyCollectionBase extends IterableCollectionBase {
    constructor(_equalityComparer = areEqual) {
        super();
        this._equalityComparer = _equalityComparer;
    }
    /**
     * Returns the current number of entries.
     * @returns {number}
     */
    get count() {
        return this.getCount();
    }
    /**
     * Returns true if the equality comparer resolves true on any element in the collection.
     * @param entry
     * @returns {boolean}
     */
    contains(entry) {
        for (const e of this) {
            if (this._equalityComparer(e, entry))
                return true;
        }
        return false;
    }
}
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