The JSON.stringify method may not accurately reflect the original object that was converted into a string

Working on a Connect Four app for my school project has been an interesting challenge. At the moment, I am grappling with JSON.stringify and trying to encode an object that holds a two-dimensional array of "hole" objects to eventually send it to the server. This process will help in broadcasting the game state updates to two clients simultaneously, ensuring both players are on the same page.

Prior to applying JSON.stringify on holeObjArray, I took a peek into its contents using console.log and was pleased to see the updated game state reflected within.

Pre-stringify object view

In particular, I observed the significance of holeObjArray[5][6] featuring 'p1' = 1, aligning perfectly with the ongoing game state (pictured on the right).

However, upon execution of JSON.stringify as seen below:

function sendGrid()
{
  console.log(holeObjArray);
  JSONStr = JSON.stringify(holeObjArray);
  console.log(JSONStr);
  //ws.send(JSONStr);
}

The resultant output of JSONStr was rather perplexing:

Post-stringify object view

Evidently, the stringified object failed to capture the current game state accurately. Instead, it seemed stuck at representing the board state from the previous play onwards. This inconsistency post JSON.stringify action raises questions over its behavior and why it fails to reflect the most recent changes. Any insights or guidance on this matter would be highly appreciated.

Thank you,

Alex

Answer №1

When you open an object in the console, it displays the property values of the object at that specific moment, rather than when it was initially logged to the console. Therefore, using JSON.stringify to log an object is the accurate method for capturing the current values at the time of logging.

Answer №2

Apologies for the incomplete response, but I have an idea on where you can begin troubleshooting this issue.

JavaScript's handling of scope can sometimes lead to unexpected outcomes. It seems like the JSON.stringify() method might be getting hoisted in this situation, causing it to assign a string to the JSONStr variable earlier than anticipated.

You could try the following approach instead:

const sendGrid = function(wholeObjArray) {
  console.log(holeObjArray);
  let JSONStr = JSON.stringify(wholeObjArray);
  return JSONStr;
}
// assuming gamestate is equal to wholeObjArray
console.log(sendGrid(gameState));
ws.send(sendGrid(gameState));

By implementing this change, you'll delay the stringification of the JSON object until it's actually required.

Feel free to reach out if this solution proves helpful!

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