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import _arity from './_arity';import _isPlaceholder from './_isPlaceholder';

/** * Internal curryN function. * * @private * @category Function * @param {Number} length The arity of the curried function. * @param {Array} received An array of arguments received thus far. * @param {Function} fn The function to curry. * @return {Function} The curried function. */export default function _curryN(length, received, fn) {  return function() {    var combined = [];    var argsIdx = 0;    var left = length;    var combinedIdx = 0;    while (combinedIdx < received.length || argsIdx < arguments.length) {      var result;      if (combinedIdx < received.length &&          (!_isPlaceholder(received[combinedIdx]) ||           argsIdx >= arguments.length)) {        result = received[combinedIdx];      } else {        result = arguments[argsIdx];        argsIdx += 1;      }      combined[combinedIdx] = result;      if (!_isPlaceholder(result)) {        left -= 1;      }      combinedIdx += 1;    }    return left <= 0      ? fn.apply(this, combined)      : _arity(left, _curryN(length, combined, fn));  };}