说几率的几率? [英] Percentage chance of saying something?

问题描述

我如何做到..

• 80％的时间会说sendMessage("hi");
• 5％的时间会说sendMessage("bye");
• 以及15％的时间会说sendMessage("Test");

• 80% of the time it will say sendMessage("hi");
• 5 % of the time it will say sendMessage("bye");
• and 15% of the time it will say sendMessage("Test");

它必须与Math.random()做些事情吗? 像

Does it have to do something with Math.random()? like

if (Math.random() * 100 < 80) {
sendMessage("hi");
}
else if (Math.random() * 100 < 5) {
sendMessage("bye");
}

推荐答案

是的，Math.random()是实现此目的的绝佳方法.您要做的是计算一个随机数，然后根据该数字做出决定:

Yes, Math.random() is an excellent way to accomplish this. What you want to do is compute a single random number, and then make decisions based on that:

var d = Math.random();
if (d < 0.5)
    // 50% chance of being here
else if (d < 0.7)
    // 20% chance of being here
else
    // 30% chance of being here

这样，您就不会错过任何可能性.

That way you don't miss any possibilities.

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