JavaScript 在一个对象中只乘以特定的值

比方说，以下是我们的对象 –

var employee =
   [
      { name: "John", amount: 800 },
      { name: "David", amount: 500 },
      { name: "Bob", amount: 450 }
   ]

我们需要将 “金额 “值乘以2，只有当金额大于500时，即预期输出应该是 −

[
   { name：'John'，amount：16001600 },
  { name: 'David', amount:500 },
  { name: 'Bob', amount:900 }
]

示例

下面是对象值相乘的例子:

var employee =
   [
      { name: "John", amount: 800 },
      { name: "David", amount: 500 },
      { name: "Bob", amount: 450 }
   ]
console.log("Before multiplying the result=")
console.log(employee)
for (var index = 0; index < employee.length; index++) {
   if (employee[index].amount > 500) {
      employee[index].amount = employee[index].amount * 2;
   }
}
console.log("After multiplying the result=")
console.log(employee)

要运行上述程序，你需要使用以下命令 −

node fileName.js.

在这里，我的文件名是demo257.js。

输出

这将在控制台产生以下输出 –

PS C:\Users\Amit\javascript-code> node demo257.js
Before multiplying the result=
[
   { name: 'John', amount: 800 },
   { name: 'David', amount: 500 },
   { name: 'Bob', amount: 450 }
]
After multiplying the result=
[
   { name: 'John', amount: 1600 },
   { name: 'David', amount: 500 },
   { name: 'Bob', amount: 900 }
]