Return index of undecodable element in dynamic.list DecodeError path #628
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johtso
commented
Jun 9, 2024
src/gleam/list.gleam
Outdated
| [x, ..xs] -> | ||
| case fun(x) { | ||
| Ok(y) -> do_try_map_with_index(xs, fun, [y, ..acc], i + 1) | ||
| Error(error) -> Error(#(i, error)) |
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Is a tuple a reasonable data structure to use?
johtso
commented
Jun 9, 2024
src/gleam/list.gleam
Outdated
| /// try_map([[1], [], [2]], first) | ||
| /// // -> Error(#(1, Nil)) | ||
| /// ``` | ||
| pub fn try_map_with_index( |
lpil
reviewed
Jun 12, 2024
|
@lpil something like that? |
lpil
reviewed
Jun 17, 2024
src/gleam/dynamic.gleam
Outdated
Comment on lines
354
to
359
| let result = try_map_with_index(list, decoder_type) | ||
| case result { | ||
| Ok(values) -> Ok(values) | ||
| Error(#(index, errors)) -> | ||
| Error(list.map(errors, push_path(_, int.to_string(index)))) | ||
| } |
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Let's make the helper function specific
Suggested change
| let result = try_map_with_index(list, decoder_type) | |
| case result { | |
| Ok(values) -> Ok(values) | |
| Error(#(index, errors)) -> | |
| Error(list.map(errors, push_path(_, int.to_string(index)))) | |
| } | |
| let result = decode_list(list, decoder_type, 0, []) | |
| case result { | |
| Ok(values) -> Ok(values) | |
| Error(#(index, errors)) -> | |
| Error(list.map(errors, push_path(_, index))) | |
| } |
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You want it to be typed to take a Decoder rather than just an a -> b function? We already have a function called decode_list.
If you have an idea for a name that doesn't conflict with the existing decode_list..
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@lpil do you think it's alright as it is now?
lpil
reviewed
Jul 8, 2024
| with fun: fn(a) -> Result(b, e), | ||
| ) -> Result(List(b), #(Int, e)) { | ||
| do_try_map_with_index(list, fun, [], 0) | ||
| } |
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These generic functions are still here, please remove them
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Closes #627
I'm new to Gleam, so fully prepared for what I'm doing here to be unidiomatic or otherwise distasteful for some reason, but thought it would be worth having a crack at it!