占位符

[BEN13459290037]

function curry(fn, params, hole) {
let fnLen = fn.length;
params = params || [];
return function (...p) {
for (let i = 0; i < params.length && p.length; i++) {
if (params[i] === hole) {
params[i] = p.shift();
}
}
let paramsAll = [...params, ...p];

if (paramsAll.filter((v) => v !== hole).length < fnLen) {
  return curry.call(this, fn, paramsAll, hole);
} else {
  return fn.apply(this, paramsAll);
}

};
}