import { Mapper } from './types';
/**
 * Scales value from [{@link inputA}, {@link inputB}] range to [{@link a}, {@link b}] range.
 *
 * @example
 * scale(0, 1, 50, 100)(75);
 * // ⮕ 0.5
 *
 * scale(50, 100)(0.5);
 * // ⮕ 75
 *
 * @param a The minimum value of output range.
 * @param b The maximum value of output range.
 * @param inputA The minimum value of input range.
 * @param inputB The maximum value of input range.
 * @returns Mapper that handles the input value scaling.
 * @group Algebra
 */
export declare function scale(a: number, b: number, inputA?: number, inputB?: number): Mapper<number>;