如何在JavaScript中按概率组合对象数组？

// 定义对象数组，每个对象包含选项和概率
var options = [
  { option: "A", probability: 0.3 },
  { option: "B", probability: 0.2 },
  { option: "C", probability: 0.5 }
];

// 计算总概率
var totalProbability = options.reduce(function(sum, option) {
  return sum + option.probability;
}, 0);

// 生成随机数
var randomNumber = Math.random() * totalProbability;

// 按概率组合对象数组
var accumulatedProbability = 0;
var selectedOption = null;
for (var i = 0; i < options.length; i++) {
  accumulatedProbability += options[i].probability;
  if (randomNumber <= accumulatedProbability) {
    selectedOption = options[i];
    break;
  }
}

// 输出结果
console.log("选中的选项是：" + selectedOption.option);