Thanks for all the input. Honestly I was expecting to be curtly told to go and RTFM. So very pleasantly surprised thank you. On 2020-10-17 6:18 p.m., Henning Thielemann wrote:
On Sat, 17 Oct 2020, Jack Kelly via Haskell-Cafe wrote:
3. At this stage, we have a parsing problem. We want a function like `parseEntry :: Text -> Either Text Entry`, where the `Left` side would be an error message (if that line fails to parse), or the `Entry` describing that line. I can see a couple of ways to attack this:
a) Use Text.words and continue with ad-hoc parsing. You may find yourself reinventing wheels that are in the library ecosystem, but for learning that might be fine? b) Use a library like megaparsec and write a full-blown parser. You will get more for free, but the learning curve may be steeper.
The text file looks like space-separated values. Thus, the cassava library may help parsing stuff into the data type.