如何从Nodejs中的列表动态获取键名

Question

How to get the key name dynamically from the list and push it to an array using NodeJS.

This is my string { PRICE: '12', TYPE: 'Electronics' }

I want to push the key name PRICE , TYPE to an array like below:

const myArray = ["PRICE", "MyOrg::PRICE", "TYPE", "MyOrg::TYPE"]

I don't know how to get the key name dynamically from the list and push it to an array - can someone pls help me with this. Thanks.

Sample code:

const test = async () => {

        const myList =  { TYPE: '12', REGION: 'Electronics' }

        // Execpted array like below
        const myArray = ["PRICE", "MyOrg::PRICE", "TYPE", "MyOrg::TYPE"]


  };
  
  test();

Answer 1

You could simply do Array.concat with Object.keys

 const myList = { TYPE: '12', REGION: 'Electronics' }; let myArray = ['PRICE', 'MyOrg::PRICE']; myArray = myArray.concat(Object.keys(myList)); console.log(myArray);

Answer 2

Question doesn't really make sense. The following code generates the output that you are asking for, but it doesn't seem useful.

 const myList = { "PRICE": 12, "TYPE": "Electronic" }; const myArray = []; Object.keys(myList).forEach( function (key) { // Loop through all the keys myArray.push(key) myArray.push("MyOrg::"+key) }) console.log(myArray) // Expected output // myArray == ["PRICE", "MyOrg::PRICE", "TYPE", "MyOrg::TYPE"]

Answer 3

You just need variable substitution in your code, that you get by enclosing variable with curly braces like this ${variable} .

 const myList = { TYPE: '12', REGION: 'Electronics' } array = Object.keys(myList) myArray = [] for (let element of array){ myArray.push(element, `MyOrg::${element}`) } console.log(myArray)