Parsing a JSON Stringified variable returns the value undefined?

Question

The code below is the entirety of my discord.js message event, I am using discord.js as well as node-wit. When wit identifies a message including a math expression, it will evaluate the value and send it back to the user.

It sends back data using JSON.stringify(). However when I try and parse it, everything I log only returns undefined.

client.on('message', (message) => {
 wClient
  .message(message.content, {})
  .then((data) => {
   const response = JSON.stringify(data, ['intents', 'name', 'confidence']);
   const responseParsed = JSON.parse(response);

   console.log(response);
   console.log(responseParsed);

   if (responseParsed.name == 'Math') {
    message.channel.send(eval(data));
   }
  })
  .catch(console.error);
});

The actual response of the console logs for the JSON.stringify() and then the JSON.parse() are listed below:

JSON.Stringify()

{"intents":[{"name":"Math","confidence":0.9945}]}

JSON.parse()

{ intents: [ { name: 'Math', confidence: 0.9945 } ] }

`responseParsed` does not have a `name` property... (and why use `eval`?) — CertainPerformance, Sep 08 '20 at 15:34
I tried that earlier, it returns `undefined`. I changed it back to not using the property so that I could show what it was returning as a whole. — StoneColdCoder, Sep 08 '20 at 15:35
I used eval because Wit returns the message with what is believes the intent is, it doesn't actually pick out the mathematical expression it detects, eval was the only way I could find to take a string and use it as a mathematical expression. — StoneColdCoder, Sep 08 '20 at 15:40
@DanielA.White I declared wClient as `const wClient = new Wit({accessToken: TOKEN})` — StoneColdCoder, Sep 08 '20 at 15:42

score 0 · Accepted Answer · answered Sep 08 '20 at 17:33

0

based on this structure

 { intents: [ { name: 'Math', confidence: 0.9945 } ] }

I assume that this is how it should be to try

 if (responseParsed.intents[0].name == 'Math') {
message.channel.send(eval(data));

}

answered Sep 08 '20 at 17:33

romanown

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Parsing a JSON Stringified variable returns the value undefined?

1 Answers1