Question

I’m trying to make a small parser which receives the json string and the path to get:

var args = process.argv;
var jsonToBeParsed = args[2];
var path = args[3];

var result = JSON.parse(jsonToBeParsed);

console.log(result);
console.log(result.path);

I’m calling this with

node parser.js '{"asd":"123", "qwe":"312"}' 'asd'

It gives me undefined

I think it has to be done with some eval function but I don’t have too much experience with node/JS.
How can I resolve this?, I need to get the result from the command line.

Edit: I’m expecting “123” in the second log. Thanks @Esailija, the question wasn’t too clear …

Answer 1

I think you are trying to use dynamic property, you cannot use .path, because that literally means .path property.

Try this:

console.log(result);
console.log(result[path]);

if path === "asd", then it will work, which is statically equivalent to result["asd"] or result.asd