| import _arity from "./internal/_arity.js"; |
| import _pipe from "./internal/_pipe.js"; |
| import reduce from "./reduce.js"; |
| import tail from "./tail.js"; |
| /** |
| * Performs left-to-right function composition. The first argument may have |
| * any arity; the remaining arguments must be unary. |
| * |
| * In some libraries this function is named `sequence`. |
| * |
| * **Note:** The result of pipe is not automatically curried. |
| * |
| * @func |
| * @memberOf R |
| * @since v0.1.0 |
| * @category Function |
| * @sig (((a, b, ..., n) -> o), (o -> p), ..., (x -> y), (y -> z)) -> ((a, b, ..., n) -> z) |
| * @param {...Function} functions |
| * @return {Function} |
| * @see R.compose |
| * @example |
| * |
| * const f = R.pipe(Math.pow, R.negate, R.inc); |
| * |
| * f(3, 4); // -(3^4) + 1 |
| * @symb R.pipe(f, g, h)(a, b) = h(g(f(a, b))) |
| */ |
| |
| export default function pipe() { |
| if (arguments.length === 0) { |
| throw new Error('pipe requires at least one argument'); |
| } |
| |
| return _arity(arguments[0].length, reduce(_pipe, arguments[0], tail(arguments))); |
| } |