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x/ramda/compose.js

:ram: Practical functional Javascript
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import pipe from './pipe';import reverse from './reverse';

/** * Performs right-to-left function composition. The rightmost function may have * any arity; the remaining functions must be unary. * * **Note:** The result of compose is not automatically curried. * * @func * @memberOf R * @since v0.1.0 * @category Function * @sig ((y -> z), (x -> y), ..., (o -> p), ((a, b, ..., n) -> o)) -> ((a, b, ..., n) -> z) * @param {...Function} ...functions The functions to compose * @return {Function} * @see R.pipe * @example * * const classyGreeting = (firstName, lastName) => "The name's " + lastName + ", " + firstName + " " + lastName * const yellGreeting = R.compose(R.toUpper, classyGreeting); * yellGreeting('James', 'Bond'); //=> "THE NAME'S BOND, JAMES BOND" * * R.compose(Math.abs, R.add(1), R.multiply(2))(-4) //=> 7 * * @symb R.compose(f, g, h)(a, b) = f(g(h(a, b))) */export default function compose() { if (arguments.length === 0) { throw new Error('compose requires at least one argument'); } return pipe.apply(this, reverse(arguments));}