Intermediate Algorithm Scripting - Everything Be True

[TonyV]

It seems to me that I am doing the same thing as Solution 2, but I am getting false for all of my tests. I don’t see the difference.

  **Your code so far**

function truthCheck(collection, pre) {

return collection.every(truthTest); 

function truthTest(test) {
  return test.hasOwnProperty(pre) && !!test.pre;
}
}
/*
//Solution 2
function truthCheck(collection, pre) {
return collection.every(function (element) {
  return element.hasOwnProperty(pre) && Boolean(element[pre]);
});
}*/

truthCheck([{name: "Quincy", role: "Founder", isBot: false}, {name: "Naomi", role: "", isBot: false}, {name: "Camperbot", role: "Bot", isBot: true}], "isBot");

  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.36

Challenge: Intermediate Algorithm Scripting - Everything Be True

Link to the challenge:

freeCodeCamp.org

[prasadsaya]

@TonyV

return test.hasOwnProperty(pre) && !!test.pre;

In the above code snippet, the test.pre results in what?

[TonyV]

I thought test.pre was interchangeable with test[pre]. Apparently not. Why? It looks like all properties are single words names.

[colinthornton]

You can only use dot notation (test.pre) when you already know the name of the property. You’re trying to access a property literally named “pre”, but none exist.

test.pre is the same as test["pre"], but quite different from test[pre] (unless the variable pre has the string value "pre", in which case they’re the same).

[TonyV]

Wow! I am glad that was the only issue. That was a very good lesson to learn in a forum like this rather than when I am under the gun to get something real done.