从注册表中读取键值

Question

我正在从注册表中读取键值。它会返回一个javascript对象，如下所示，

我无法访问该值。

I tried to print the value as 
path="HKLM\\System\\CurrentControlSet\\Control\\Session Manager\\Environment";
console .log(result.path.values.USERNAME);//prints undefined

Answer 1

尝试以下代码：

result[path].values.USERNAME // array syntax

在JavaScript中，当您使用“常规对象语法”时，将变量用作Object的属性名称没有用，它将返回undefined（如果它没有具有与您的变量的确切名称相同的属性）：< / p>

const obj = {
  key1: 'value1',
  key2: 'value2'
}

let prop = 'key1'

// this returns undefined,
// as obj doesn't have a prop1 property
console.log('obj.prop:', obj.prop)

// this display value1, because an Object
// is an Array (under the hood), so you can
// call it's keys in an array syntax
console.log('obj[prop]:', obj[prop])

// if the prop variable gets a new value, then
// it will return a value from obj according to
// prop's new value

prop = 'key2'
console.log('prop = \'key2\':', obj[prop])

// you can use the array syntax for listing out
// the property values of an Object:
for (let key in obj) {
  console.log('iteration ' + key + ':', obj[key])
}