Timeline for What are the functional equivalents of imperative break statements and other loop checks?
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| Jan 4, 2018 at 10:30 | comment | added | nilern | @Jules I think returning Left does not prevent the fold from visiting the entire list (or other sequence). Not intimately familiar with Haskell standard library internals though. | |
| Jan 4, 2018 at 10:26 | comment | added | Jules |
Re using error monads in Haskell, I don't believe there is any real performance penalty here. They tend to get thought of along the lines of exception handling, but they don't work the same way and there isn't any stack walking required, so really shouldn't be a problem if used this way. Also, even if there's a cultural reason not to use something like MonadError, the basically-equivalent Either has no such bias towards only error handling, so can easily be used as a substitute.
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| Jan 4, 2018 at 10:13 | review | First posts | |||
| Jan 4, 2018 at 13:16 | |||||
| Jan 4, 2018 at 10:13 | history | answered | nilern | CC BY-SA 3.0 |