import { DeviceType, Conjunction } from './utils-types';
export declare function format(first: string | undefined, middle: string | undefined, last: string | undefined): string;
export declare function hasMultipleTrueValues<T>(arr: T[], key: keyof T): boolean;
export declare function extractValuesByKey<T>(objects: T[], key: keyof T): Array<T[keyof T]>;
export declare function organizeObjectKeys(data: any[], columns: string[]): any[];
export declare function removeObjectsBySpecificKey<T>(objects: T[], key: keyof T, value: boolean | 'true'): [T[], T[]];
/**
 * Takes an input value and determines whether or not it is a number.
 *
 * @param {string | number} value - The value you would like to test against.
 *
 * @returns {boolean}
 */
export declare function isNumber(value: string | number): boolean;
export declare function isEmpty(str: string | undefined | null): boolean;
/**
 * Takes a string value of "true" and converts it to boolean true.
 *
 * All other values are converted to boolean false.
 *
 * Has advantages over the built in JavaScript Boolean() constructor / function.
 *
 * Using Boolean() could lead to unexpected results.
 *
 * e.g. Boolean("false") evaluates to a boolean value of true.
 *
 * @param {string} value - The value you would like to convert to a boolean.
 *
 * @returns {boolean}
 */
export declare function convertStringToBoolean(value: string): boolean;
/**
 * Retrieves the keys from an enum and lists them in an array.
 *
 * @param {object} enumObject - The enum you wish to get the keys of.
 *
 * @returns {string[]}
 */
export declare function retrieveEnumKeys(enumObject: object): string[];
/**
 * Prints an array as a comma delimited list, with the last element being preceded by a conjunction.
 * As per ontario.ca content guidelines, there is no Oxford comma.
 *
 * @param {Array<any>} arr - The array that you wish to print.
 * @param {Conjunction} conjunctionType - Whether you want the sentence to end with 'and value.' or 'or value.'
 *
 * @returns {string}
 */
export declare function printArray(arr: Array<any>, conjunctionType?: Conjunction): string;
/**
 * Grabs the HTML element of the page.
 *
 * More targetted than document.documentElement as the documentElement could
 * in theory be any element that is the top level. e.g. <div> if the page is not
 * set up to be semantically correct.
 *
 * @returns {HTMLElement}
 */
export declare function getRootHTMLElement(): HTMLElement;
/**
 * Determines the device type based on screen breakpoints.
 *
 * @returns {DeviceType}
 */
export declare function determineDeviceType(): DeviceType;