2011/9/16 Roel van Dijk
Hello everyone,
I would like to announce the release of the numerals and numerals-base packages.
* Numerals
The numerals package contains functions to convert numbers to number words in a number of languages. For now the package only supports cardinal numbers.
Cool! Are you familiar with the Grammatical Framework [1]? It is a Haskell library and language for natural language parsing and translation -- If you need to do a lot of translation or string localization, you should take a look at it as much of the complexity has been addressed there. That said, the numeral libraries for GF are somewhat limited (and/or somewhat undocumented) so there is probably a lot your experience and library could bring to that project. [1] http://www.grammaticalframework.org --Rogan
Example:
import qualified Text.Numeral.Language.EN as EN EN.uk_cardinal 123 :: Maybe String Just "one hundred and twenty-three"
You can also inspect the underlying structure of a number word:
import Text.Numerals EN.shortScaleStruct 123 :: Exp Add (Mul (Lit 1) (Lit 100)) (Add (Mul (Lit 2) (Lit 10)) (Lit 3))
Compare this structure with the number word: 1 (one) * 100 (hundred) + (and) 2 (twen) * 10 (ty) + 3 (three)
The package also comes with a test suite:
cabal configure --enable-tests cabal build ./dist/build/test-numerals/test-numerals --hide-successes
I recommend the "--hide-successes" option of test-framework (>=0.4) because there are many tests (3383).
* Numerals-base
The numerals-base package contains all the machinery upon which numerals is build. Using this package you can write conversion functions for your own language(s). It is documented, although the documentation can be improved. For now the numerals package is probably the best documentation.
* Resources:
Hackage: http://hackage.haskell.org/package/numerals http://hackage.haskell.org/package/numerals-base
Github: http://github.com/roelvandijk/numerals http://github.com/roelvandijk/numerals-base
* Help wanted
Currently I support 24 languages. But I only have some experience with 4 of them. The rest is scraped together with information I found online. For most languages I can find online how to form the first 100 cardinal numbers. But after that information is sparse. You can help by checking and expanding the test suite. This is very simple because the test suite consists only of numbers combined with the expected cardinal number word.
Regards, Roel van Dijk
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