I use languages with REPL support since 1995. A REPL helps interactive developme... | Hacker News

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pjmlp on Dec 4, 2013 | parent | context | favorite | on: Why Scala is the best language available today

I use languages with REPL support since 1995.

A REPL helps interactive development a lot, but it is by no means a substitute for testing enterprise class applications.

You cannot cover all use cases of your code. Specially when other departments using your libraries make assumptions about your code behavior.

yogthos on Dec 4, 2013 [–]

I didn't say it was a substitute for testing. My point was that it lets you know what the code is doing immediately. This doesn't remove the need for tests, but it means that you don't have to run tests every time you make a change.

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