You may not need a Builder

transcript

The Builder pattern is famous. Every interview asks about it. In Python and JavaScript, you often skip it. The language already does the job. Here is why.

A builder names each value, one call at a time. Then build checks the rules. Keyword arguments name each value in one call. The constructor checks the rules.

Python has keyword arguments with defaults, and a frozen dataclass. JavaScript passes one options object. Java has no named arguments, so a record with withers.

To change one value, make a new request. Python calls it replace. The constructor checks it again, and the original stays as it was.

No named arguments, and many options. An object built in steps, from different places in the code. Or one builder reused as a template.

Name each value, and check the rules. Use the smallest tool that does both. Often that is no Builder at all.

Full breakdown in the lecture.