import * as i0 from "@angular/core";
export declare class SortService {
    constructor();
    /**
     *  Sort an array of object by the given object property and sort direction
     * @param arr - the array of objects to be sorted
     * @param propertyName - the object property to sort by
     * @param isAsc - whether or not the sort direction is ascending
     * @returns - the sorted array
     */
    sortData(arr: any[], propertyName: string, isAsc: boolean, isDate?: boolean): any[];
    /**
     * Helper method to sort data
     * @param a - the object property to compare
     * @param b  - the object property to compare
     * @param isAsc - whether or not the sort direction is ascending
     */
    private compare;
    /**
     * Helper method to sort Dates
     * @param a - the object property to compare
     * @param b  - the object property to compare
     * @param isAsc - whether or not the sort direction is ascending
     */
    private compareDates;
    static ɵfac: i0.ɵɵFactoryDeclaration<SortService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<SortService>;
}