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pipe.js
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pipe.js
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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)))
* @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))
);
}