节点JS字符串在花括号内

Question

  // My input String
  // Could be on : true, on : false, bri : 255, etc, etc
  var inputString = 'on : true'
  console.log(inputString);
  var wrongResult = { inputString }
  console.log(wrongResult);

  // The result that I am trying to achieve
  var desiredResult = {
    on : true
  }
  console.log(desiredResult);

Run it: https://repl.it/LCDt/4

I created the above code snippet to demonstrate the problem that I am experiencing. I have an input string that I receive that could be "on : true", "on : false", "bri : 250", "sat : 13", etc. When posting this data to a server, the format that works is seen above as the "desireResult".

But, when taking a string, such as 'on : true', in a variable, and placing it inside {}, it always seems to create a dictionary with the variable name as the key and the string itself as the value.

Can someone explain why this is and how to get around it?

Answer 1

Can someone explain why this is

Because the syntax { foo } means "Create an object, give it a property called foo , give that property the value of the foo variable.

how to get around it

Parse the data. Assign it explicitly.

Start by splitting the string on : . Then remove the white space. Then test is the second value is a number or a keyword. And so on.

---

This would be easier if the data you were receiving was in a standard format. Then you could use an existing parser. If you have control over the input: Change it to be valid JSON and then use JSON.parse .

Answer 2

You could use JSON.parse for that but you need to feed him valid JSON. You need to have an string in form of:

    {"on":true}

using JSON.parse('{"on":true}') will return you the desired object.