Typescript:给定一个函数表，创建一个函数，该函数采用表中的键和表中函数的第二个参数

type FunctionTable<T> = {
  [key: string]: (arg: T) => void;
};

function createFunction<T>(table: FunctionTable<T>): (key: string, arg: T) => void {
  return (key: string, arg: T) => {
    const func = table[key];
    if (func) {
      func(arg);
    } else {
      throw new Error(`Function with key '${key}' not found in the table.`);
    }
  };
}

// 示例用法
const table: FunctionTable<number> = {
  add: (num: number) => {
    console.log(num + 1);
  },
  multiply: (num: number) => {
    console.log(num * 2);
  }
};

const executeFunction = createFunction(table);
executeFunction('add', 5); // 输出：6
executeFunction('multiply', 3); // 输出：6
executeFunction('subtract', 10); // 抛出错误：Function with key 'subtract' not found in the table.