從Javascript記錄數組中選擇隨機項並將其轉換為數組

Question

我如何從以下Javascript記錄數組中隨機選擇一個項目，然后將結果轉換為數組，然后從中選擇一個隨機項目？

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，如果選擇了第二項，那么我要從“區域”字段中選擇"Brickfields, Central Bletchley, Fenny Stratford, Water Eaton"並將其分配給變量。

Answer 1

獲取最小值，最大值（包括最小值）的隨機整數的函數

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

從傳遞的變量plot查找隨機值的函數

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];
}

並像這樣使用

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))