Re: [Haskell-beginners] Help with enumerator pipeline

Actually, you can use fromValue[1] to get a Builder. [1] http://hackage.haskell.org/packages/archive/aeson/0.3.2.11/doc/html/Data-Aes... On Thu, Sep 1, 2011 at 6:33 PM, Michael Xavier wrote:

I've been meaning to take a look at blaze-builder anyways, but there is a specific reason to use lazy ByteStrings. I'm using the Aeson library for parsing/encoding JSON data. The encode function in that library chose lazy ByteStrings as the output format. While performance on this project is a factor, I'm reimplementing a project done in Ruby, so it won't be too hard to best it in that dimension in Haskell, regardless of the output format ;)

On Thu, Sep 1, 2011 at 7:27 AM, Ertugrul Soeylemez wrote:

...

Michael Xavier wrote:

...

I've just recently started learning how to use the enumerator library. I'm designing a utility that parses a file where each line is a JSON object.  I've designed it to look like:

source enumerator (enumHandle pretty much) -> chunk by lines (enumeratee) -> parse a line into an Object (enumeratee) -> filter objects based on a criteria (enumeratee) -> limit some keys from each object (enumeratee) -> encode the object into a lazy bytestring (enumeratee) -> output the file to stdout (iteratee)

If there is no specific reason to use lazy ByteStrings, I would suggest that you use a concept complementary to iteratees, the blaze-builder library for efficient stream output.

Greets, Ertugrul

-- nightmare = unsafePerformIO (getWrongWife >>= sex) http://ertes.de/

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