import { type DifferenceType } from './types.js';
/**
 * Get the unknown value type as a string
 * @param unknownValue - A value of unknown type
 * @returns The unknown value type as a string
 */
export declare function getTypeOfUnknown(unknownValue: unknown): 'array' | 'boolean' | 'date' | 'function' | 'null' | 'number' | 'object' | 'string' | 'symbol' | 'undefined';
/**
 * Check if the unknown value is blank, which means its either an empty string, undefined or null
 * @param potentialBlank - A value of unknown type
 * @returns True if the value is blank, false otherwise
 */
export declare function isBlank(potentialBlank: unknown): boolean;
/**
 * Check if the unknown value is a simple value, which means its either a boolean, number or string
 * @param potentialValue - A value of unknown type
 * @returns True if the value is a simple value, false otherwise
 */
export declare function isValue(potentialValue: unknown): potentialValue is boolean | number | string;
/**
 * Check if the unknown value is an array
 * @param potentialArray - A value of unknown type
 * @returns True if the value is an array, false otherwise
 */
export declare function isArray(potentialArray: unknown): potentialArray is unknown[];
/**
 * Check if the unknown value is a function
 * @param potentialFunction - A value of unknown type
 * @returns True if the value is a function, false otherwise
 */
export declare function isFunction(potentialFunction: unknown): potentialFunction is Function;
/**
 * Check if the unknown value is a symbol
 * @param potentialSymbol - A value of unknown type
 * @returns True if the value is a symbol, false otherwise
 */
export declare function isSymbol(potentialSymbol: unknown): potentialSymbol is symbol;
/**
 * Check if the unknown value is an object, which means it's not a simple value, array, date, function or symbol
 * @param potentialObject - A value of unknown type
 * @returns True if the value is an object, false otherwise
 */
export declare function isObject(potentialObject: unknown): potentialObject is object;
export declare function getDifferenceType(valueFrom: unknown, valueTo: unknown): DifferenceType;