What does “to stub” mean in programming?

Question

For example, what does it mean in this quote?

Integrating with an external API is almost a guarantee in any modern web app. To effectively test such i

Answer 1

"Stubbing-out a function means you'll write only enough to show that the function was called, leaving the details for later when you have more time."

From: SAMS Teach yourself C++, Jesse Liberty and Bradley Jones