[英]How to subtract value from one array to another and create a new Array?
我有 2 個長度相同的 arrays A和B ,我想從A到B減去“余額”和“總計”,並創建一個新數組“ C ”,減去值............ ..................................................... ………………………………………………………………………………
A = [
{
"ID": 1,
"balance": 100,
"total": 1000,
"date": "10/24/2019",
},
{
"ID": 2,
"balance": 200,
"total": 2000,
"date": "10/24/2019",
}
]
B =[
{
"ID": 1,
"balance": 80,
"total": 800,
"date": "10/23/2019",
},
{
"ID": 2,
"balance": 90,
"total": 900,
"date": "10/23/2019",
}
]
新陣列(A - B = C)
C = [
{
"ID": 1,
"balance": 20,
"total": 200,
},
{
"ID": 2,
"balance": 110,
"total": 1100,
}
]
數組包含對象
var C=[];
for (i=0;i<a.length;i++){
result={};
result.ID=A[i].ID;
result.balance=A[i].balance-B[i].balance;
result.total=A[i].total-B[i].total;//if it makes sense
C.push(result);
}
console.log(C);
如果您確定 arrays 的長度和 position 您可以遍歷其中一個的長度:
const A = [];
const B = [];
const C = A.map((item, index) => ({
ID: item.ID,
balance: item.balance - B[index].total,
total: item.total - B[index].total
}))
}
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