32 lines
870 B
JavaScript
32 lines
870 B
JavaScript
/**
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* Composes single-argument functions from right to left. The rightmost
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* function can take multiple arguments as it provides the signature for
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* the resulting composite function.
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*
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* @param {...Function} funcs The functions to compose.
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* @returns {Function} A function obtained by composing the argument functions
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* from right to left. For example, compose(f, g, h) is identical to doing
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* (...args) => f(g(h(...args))).
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*/
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export default function compose() {
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for (var _len = arguments.length, funcs = Array(_len), _key = 0; _key < _len; _key++) {
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funcs[_key] = arguments[_key];
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}
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if (funcs.length === 0) {
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return function (arg) {
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return arg;
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};
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}
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if (funcs.length === 1) {
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return funcs[0];
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}
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return funcs.reduce(function (a, b) {
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return function () {
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return a(b.apply(undefined, arguments));
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};
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});
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} |