[Bug] Basic Data Structures: Check if an Object has a Property

Describe your problem and how to reproduce it: Found from this PR https://github.com/freeCodeCamp/freeCodeCamp/pull/19367 The tests are only checking if all the properties exists and another check is done after deleting all the properties so code like:

function isEveryoneHere(obj) {
  return users.hasOwnProperty('Alan', 'Jeff', 'Sarah', 'Ryan'); //shouldnt pass since .hasOwnProperty() doesnt take more than 1 parameter but would only check the first one.
}

and

function isEveryoneHere(obj) {
  return obj.hasOwnProperty("Alan");
}

Passes the challenge whereas they shouldn’t.

This can be resolved by adding checks after deleting each property or randomly deleting one and then checking. Add a Link to the page with the problem: https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-data-structures/check-if-an-object-has-a-property/

Tell us about your browser and operating system:

• Browser Name: Chrome
• Browser Version: 69
• Operating System: 10

[RandellDawson]

@wudifeixue I completely agree with you, so I just created PR https://github.com/freeCodeCamp/freeCodeCamp/pull/36125 which adds two valid solutions to the article.

Keep in mind, even when the PR is merged, you will not see the Guide updated until the current master branch has been deployed to production.

[RandellDawson]

@razzlestorm It has been fix but not deployed to production.