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is it true that instanceof works for objects?
Yes, that's true. instanceof operator in JavaScript is used to check the type of an object at runtime. It returns true if the object is an instance of a particular class otherwise it returns false. Here's an example:
javascript Copy code
class Person {
constructor(name, age) {
this.name = name;
this.age = age;
}
}
const john = new Person('John', 25);
console.log(john instanceof Person); // true
console.log(john instanceof Object); // true (since Person is a type of Object)
In this example, we create a new instance of the Person class and use the instanceof operator to check if it's an instance of the Person class or not. The first console.log statement returns true since john is an instance of Person class which means it has name and age attributes defined in the Person constructor. The second console.log statement returns true since Person is a type of Object. Note that instanceof only works with objects not with primitive data types like string, boolean, etc.
is it true that instanceof works for primitives and returns true or false?
Yes, the instanceof operator in JavaScript can be used to determine whether an object is an instance of a particular class or constructor function. It can also be used with primitive values like strings, numbers, and booleans, as they are automatically converted to their corresponding object wrapper types (String, Number, and Boolean) when necessary.
However, it doesn't return a simple true/false value like you mentioned. Instead, it returns true if the specified object is an instance of the specified constructor, and false otherwise. Here's an example:
javascript Copy code
const str = 'Hello, world!';
console.log(str instanceof String); // logs false, because str is not a String object
console.log(new String(str) instanceof String); // logs true, because the new String() constructor returns a String object
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AI stands for Artificial Intelligence. AI bots are able to learn from conversations with users and expand their knowledge this way.
SheCodes Athena will help you with technical questions about your code using artificial intelligence to find the answer. Imagine a super powerful human who has memorized everything on the internet and can access that knowledge in a matter of seconds. 🤯
SheCodes Athena can answer most coding-related questions, even complicated ones! It can even find bugs in your code and tell you how to fix them in just a few seconds. Impressive, right?
Just remember we're still in testing mode so the AI may return strange or incorrect replies. Feel free to message us if this happens!
SheCodes Athena can only reply to coding-related technical questions. The same type of questions you would ask in the channels on Slack.
For questions that are not coding-related, write us here 😃
You should treat Athena like a SheCodes team member, so always be polite! 😊 Ask your questions as detailed as possible, just like you would do on Slack.
Here are some examples:
- Prettier isn't working on my VS Code. How do I fix this?
- How do I make bullet points with different colors using the list element?
- My code in Codesandbox is having some issues. Can you please tell me what the issue is? [Include the link to your Codesandbox]
For now, SheCodes Athena is limited to 5 questions per day for each student.
In that case, you can either ask SheCodes Athena a follow-up question, or you can post on the designated weekly channel on Slack!
Our technical assistants are still available on Slack and are always happy to help! 😍💪
Remember, questions are limited to 1000 characters.
- If you're working with an HTML file: Post a snippet of your code related to the issue you're having (just copy the code and paste it into the question box).
- If you're working with Codesandbox: Good news, you can just post the link to your Codesandbox and the AI Assistant will be able to view your code.
- If you have a longer question that would require an entire HTML file or more than 1000 characters, post it in the designated weekly channels on Slack! 😃
Athena was the Greek goddess of wisdom, among other elements. She received her name from the city of Athens, which she is known for protecting.
Much like the goddess Athena, SheCodes Athena is also incredibly wise and can solve complicated coding puzzles in a matter of seconds! 😍
Not likely. AI can automate tasks and make developers' jobs more efficient but it can't fully replace the human ability to deal with complex software. And AI will still require human developers to supervise and improve it further.
So developers may see their tasks change but they won't be replaced by AI. 👩💻🤝💻