97 lines
2.5 KiB
JavaScript
97 lines
2.5 KiB
JavaScript
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import _curry2 from "./internal/_curry2.js";
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/**
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* Wraps a function of any arity (including nullary) in a function that accepts
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* exactly `n` parameters. Any extraneous parameters will not be passed to the
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* supplied function.
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*
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* @func
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* @memberOf R
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* @since v0.1.0
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* @category Function
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* @sig Number -> (* -> a) -> (* -> a)
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* @param {Number} n The desired arity of the new function.
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* @param {Function} fn The function to wrap.
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* @return {Function} A new function wrapping `fn`. The new function is guaranteed to be of
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* arity `n`.
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* @see R.binary, R.unary
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* @example
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*
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* const takesTwoArgs = (a, b) => [a, b];
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*
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* takesTwoArgs.length; //=> 2
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* takesTwoArgs(1, 2); //=> [1, 2]
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*
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* const takesOneArg = R.nAry(1, takesTwoArgs);
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* takesOneArg.length; //=> 1
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* // Only `n` arguments are passed to the wrapped function
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* takesOneArg(1, 2); //=> [1, undefined]
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* @symb R.nAry(0, f)(a, b) = f()
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* @symb R.nAry(1, f)(a, b) = f(a)
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* @symb R.nAry(2, f)(a, b) = f(a, b)
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*/
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var nAry =
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/*#__PURE__*/
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_curry2(function nAry(n, fn) {
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switch (n) {
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case 0:
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return function () {
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return fn.call(this);
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};
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case 1:
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return function (a0) {
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return fn.call(this, a0);
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};
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case 2:
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return function (a0, a1) {
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return fn.call(this, a0, a1);
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};
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case 3:
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return function (a0, a1, a2) {
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return fn.call(this, a0, a1, a2);
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};
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case 4:
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return function (a0, a1, a2, a3) {
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return fn.call(this, a0, a1, a2, a3);
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};
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case 5:
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return function (a0, a1, a2, a3, a4) {
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return fn.call(this, a0, a1, a2, a3, a4);
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};
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case 6:
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return function (a0, a1, a2, a3, a4, a5) {
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return fn.call(this, a0, a1, a2, a3, a4, a5);
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};
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case 7:
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return function (a0, a1, a2, a3, a4, a5, a6) {
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return fn.call(this, a0, a1, a2, a3, a4, a5, a6);
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};
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case 8:
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return function (a0, a1, a2, a3, a4, a5, a6, a7) {
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return fn.call(this, a0, a1, a2, a3, a4, a5, a6, a7);
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};
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case 9:
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return function (a0, a1, a2, a3, a4, a5, a6, a7, a8) {
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return fn.call(this, a0, a1, a2, a3, a4, a5, a6, a7, a8);
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};
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case 10:
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return function (a0, a1, a2, a3, a4, a5, a6, a7, a8, a9) {
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return fn.call(this, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9);
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};
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default:
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throw new Error('First argument to nAry must be a non-negative integer no greater than ten');
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}
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});
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export default nAry;
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