随性绘图

Question

我在 js 中有这样的对象：

    const Obj = [ {
     propability: 0.5, 
      name: 'Item with propability 0.5%'
     }, {
    propability: 1, 
    name: 'Item with propability 1%'
   }
];

有人知道如何为此创建算法吗？只是简单的代码。

我想return他的概率物品

Answer 1

如果我没理解错的话，你想要这样的东西：

const Obj = [ 
    {
        propability: 0.5, 
        name: 'Item with propability 0.5%'
    }, 
    {
        propability: 5, 
        name: 'Item with propability 5%'
    }, 
    {
        propability: 10, 
        name: 'Item with propability 10%'
    }, 
    {
        propability: 0.0001, 
        name: 'Item with propability 0.0001%'
    }
];

// get total probability
var total = 0;
for(let j in Obj){
    total += Obj[j].propability;
}

//choose random obj
console.log(pick_random());

function pick_random(){
    var pick = Math.random()*total;
    for(let j in Obj){
        pick -= Obj[j].propability;
        if(pick <= 0){
            return Obj[j];
        }
    }
}

随性绘图

Drawing with propalibity

javascript

algorithm

probability