How do I read a stack trace?

What is a stack trace and why is it important?

A stack trace is a report of the active stack frames at a certain point in time during the execution of a program. It's important for debugging because it shows the sequence of function calls that led to an error.

How can I read a stack trace to find the source of an error?

To read a stack trace, start from the top, which usually indicates the most recent call. Look for the error message and trace back through the function calls to identify where the issue originated.

Can you give me an example of a stack trace?

Sure! Here's a simple example:

TypeError: Cannot read property 'foo' of undefined
    at bar (app.js:10)
    at baz (app.js:5)
    at main (app.js:1)

In this case, the error occurred in the bar function, which was called by baz, and so on.

What tools can help me analyze stack traces?

You can use debugging tools like Chrome DevTools for JavaScript, or IDEs like Visual Studio and PyCharm, which provide features to analyze stack traces effectively.