_curryN.js•1.16 kB
var _arity = require('./_arity');
var _isPlaceholder = require('./_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.
*/
module.exports = 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));
};
};