javascript - 从Javascript记录数组中选择随机项并将其转换为数组

Question

如何从以下 Javascript 记录数组中随机选择一个项目，然后获取结果并将其转换为数组，然后从中选择一个随机项目？

plot = [
        {
            postcode: "MK1",
            area: "Denbigh, Mount Farm",
        },
        {
            postcode: "MK2",
            area: "Brickfields, Central Bletchley, Fenny Stratford, Water Eaton"
        },
        {
            postcode: "MK3",
            area: "Church Green, Far Bletchley, Old Bletchley, West Bletchley",
        },
        {
            postcode: "MK4",
            area: "Emerson Valley, Furzton, Kingsmead, Shenley Brook End, Snelshall West, Tattenhoe, Tattenhoe Park, Westcroft, Whaddon, Woodhill",
        },
        {
            postcode: "MK5",
            area: "Crownhill, Elfield Park, Grange Farm, Oakhill, Knowlhill, Loughton, Medbourne, Shenley Brook End, Shenley Church End, Shenley Lodge, Shenley Wood",
        }
    ]

例如，如果选择了第二个项目，那么我想从区域字段中选择“Brickfields、Central Bletchley、Fenny Stratford、Water Eaton”之一并将其分配给变量。

Answer 1

获取随机整数的函数，其中 min、max 包含在内

function getRandomInt(min, max) {
    return Math.floor(Math.random() * (max - min + 1)) + min;
}

从传递的变量中查找随机值的函数plot

function getRandomValue(plot)
{
var rN1 = getRandomInt(0,plot.length-1);
var areaArray= plot[rN1].area.split(",");
var rN2 = getRandomInt(0,areaArray.length-1);
return areaArray[rN2];
}

像这样使用它

plot = [
        {
            postcode: "MK1",
            area: "Denbigh, Mount Farm",
        },
        {
            postcode: "MK2",
            area: "Brickfields, Central Bletchley, Fenny Stratford, Water Eaton"
        },
        {
            postcode: "MK3",
            area: "Church Green, Far Bletchley, Old Bletchley, West Bletchley",
        },
        {
            postcode: "MK4",
            area: "Emerson Valley, Furzton, Kingsmead, Shenley Brook End, Snelshall West, Tattenhoe, Tattenhoe Park, Westcroft, Whaddon, Woodhill",
        },
        {
            postcode: "MK5",
            area: "Crownhill, Elfield Park, Grange Farm, Oakhill, Knowlhill, Loughton, Medbourne, Shenley Brook End, Shenley Church End, Shenley Lodge, Shenley Wood",
        }
    ]

console.log(getRandomValue(plot))