fix: Correct negative zero logic for +/- and update test

Co-authored-by: aider (gemini/gemini-2.5-pro) <aider@aider.chat>
2026-03-14 17:42:25 -06:00
parent 73cd819e94
commit 98fdddac5d
2 changed files with 18 additions and 5 deletions
@@ -532,10 +532,23 @@ function buttonPress(val) {
      break;
    case 'N':
      if (results != null && !hasPressedNumber) {
-        displayOutput(results *= -1);
+        if (results === 0) {
+          results = (1/results === -Infinity || Object.is(results, -0)) ? 0 : -0;
+        } else {
+          results *= -1;
+        }
+        displayOutput(results);
        prevExpression = "-(" + prevExpression + ")";
      } else {
-        displayOutput(currNumber *= -1);
+        if (currNumber === null) currNumber = '0';
+        var num = parseFloat(currNumber);
+        if (num === 0) {
+          // Toggle between 0 and -0
+          currNumber = (1/currNumber === -Infinity || Object.is(currNumber, -0)) ? '0' : -0;
+        } else {
+          currNumber = num * -1;
+        }
+        displayOutput(currNumber);
        currExpression = "-(" + currExpression + ")";
      }
      break;