javascript - JS数组合并求和

Question

我有数组

{"BS-WHITE":3,"BS-BOX":1}//input value
{"BS-WHITE":2,"BS-BOX":0,"BS-WHITE-1":1}//output value

我想合并它们以得到像这样的数组:

[["BS-WHITE",3,2],["BS-BOX",1,0],["BS-WHITE-1",0,1]]

如果值不存在应该为 0。

Answer 1

不清楚你是想要输出对象还是数组。

无论如何..你可以试试下面的方法。

如果你需要一个输出数组。

a = {"BS-WHITE":3,"BS-BOX":1}//input value
b = {"BS-WHITE":2,"BS-BOX":0,"BS-WHITE-1":1}

c = [...new Set([...Object.keys(a), ...Object.keys(b)])];

result = c.map((key) => {
   return  {
        [key]: [(a[key] || 0), (b[key] || 0)] 
    }   
});

console.log(result);

如果你需要一个输出对象。

a = {"BS-WHITE":3,"BS-BOX":1}//input value
b = {"BS-WHITE":2,"BS-BOX":0,"BS-WHITE-1":1}

c = [...new Set([...Object.keys(a), ...Object.keys(b)])];

result = c.reduce((acc,key) => {
        acc[key] = [(a[key] || 0), (b[key] || 0)] 
        return acc;
  
}, {});

console.log(result);

如果你需要数组的数组

a = {"BS-WHITE":3,"BS-BOX":1}//input value
b = {"BS-WHITE":2,"BS-BOX":0,"BS-WHITE-1":1}

c = [...new Set([...Object.keys(a), ...Object.keys(b)])];

result = c.map(key => {
        return [key , (a[key] || 0), (b[key] || 0)]
  
});

console.log(result);