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Why should a developer copy existing code instead of starting new code from scratch?

A developer must copy existing, working code instead of building new code from scratch. Existing code already includes many design decisions and user experience refinements.

By Pawan Nayar · from the LLOS AI Learning record

The rule

A developer must copy existing, working code instead of building new code from scratch.

Existing code already includes many design decisions and user experience refinements.

Starting with existing code saves time. Existing code has already been tested. It includes many small improvements for the user. New code lacks these important details.

A developer needs to create a new puzzle page. The developer copies an existing puzzle page that works well. The developer changes only the puzzle data. This ensures the new page has good design and features from the start.

Questions people ask

More from the same record, pulled by shared topic — not written new for this page.

How should a developer create new blog pages?

A developer should always use the existing component library. The library is located at llos/blog/.

How should an AI model handle many tasks at once?

An AI model should use fast methods for large tasks. The AI model should not ask for permission for individual steps.

How can an AI model help a user sort many items into two groups?

An AI model can use a binary toggle grid. This tool shows a user many items.

When should an AI model give an answer, even if the answer is not perfect?

An AI model should provide an answer as soon as possible. Waiting for a perfect answer can cause delays.

What to remember

A developer must copy existing, working code instead of building new code from scratch. Existing code already includes many design decisions and user experience refinements.