Re: [Haskell-cafe] ANNOUNCE: vector-bytestring-0.0.0.0

17 Oct 2011

      On 15 October 2011 23:18, Ivan Lazar Miljenovic
 wrote:
...
On 16 October 2011 01:15, Bas van Dijk  wrote:
...
I agree that you shouldn't use ByteStrings or Vectors of Word8s for
Unicode strings. However I can imagine that for quick sessions in ghci
it can be quite handy if they are shown as strings. For example,
currently we have:
...
import Network.HTTP.Enumerator
simpleHttp "http://code.haskell.org/~basvandijk/"
Chunk "<html>\n<head><title>Bas van
Dijk</title></head>\n<body>\n<h1>Bas van Dijk</h1>\n\n<p>Email: v.dijk.bas@gmail.com</a></p>\n\n<p>Nick
on IRC: <tt>basvandijk</tt></p>\n\nhttp://www.haskellers.com/user/basvandijk/\">\n  http://www.haskellers.com/static/badge.png\" \n       alt=\"I'm
a Haskeller\"\n       border=\"0\">\n</a>\n\n<p>See my https://github.com/basvandijk\">GitHub</a> page for a list of
projects I work on.</p>\n\n</body>\n</html>\n" Empty
If ByteStrings were not shown as strings this would look like:
Chunk ( fromList
[60,104,116,109,108,62,10,60,104,101,97,100,62,60,116,105,116,108,101,62,66,97,115,32,118,97,110,32,68,105,106,107,60,47,116,105,116,108,101,62,60,47,104,101,97,100,62,10,60,98,111,100,121,62,10,60,104,49,62,66,97,115,32,118,97,110,32,68,105,106,107,60,47,104,49,62,10,10,60,112,62,69,109,97,105,108,58,32,60,97,32,104,114,101,102,61,34,109,97,105,108,116,111,58,47,47,118,46,100,105,106,107,46,98,97,115,64,103,109,97,105,108,46,99,111,109,34,62,118,46,100,105,106,107,46,98,97,115,64,103,109,97,105,108,46,99,111,109,60,47,97,62,60,47,112,62,10,10,60,112,62,78,105,99,107,32,111,110,32,73,82,67,58,32,60,116,116,62,98,97,115,118,97,110,100,105,106,107,60,47,116,116,62,60,47,112,62,10,10,60,97,32,104,114,101,102,61,34,104,116,116,112,58,47,47,119,119,119,46,104,97,115,107,101,108,108,101,114,115,46,99,111,109,47,117,115,101,114,47,98,97,115,118,97,110,100,105,106,107,47,34,62,10,32,32,60,105,109,103,32,115,114,99,61,34,104,116,116,112,58,47,47,119,119,119,46,104,97,115,107,101,108,108,101,114,115,46,99,111,109,47,115,116,97,116,105,99,47,98,97,100,103,101,46,112,110,103,34,32,10,32,32,32,32,32,32,32,97,108,116,61,34,73,39,109,32,97,32,72,97,115,107,101,108,108,101,114,34,10,32,32,32,32,32,32,32,98,111,114,100,101,114,61,34,48,34,62,10,60,47,97,62,10,10,60,112,62,83,101,101,32,109,121,32,60,97,32,104,114,101,102,61,34,104,116,116,112,115,58,47,47,103,105,116,104,117,98,46,99,111,109,47,98,97,115,118,97,110,100,105,106,107,34,62,71,105,116,72,117,98,60,47,97,62,32,112,97,103,101,32,102,111,114,32,97,32,108,105,115,116,32,111,102,32,112,114,111,106,101,99,116,115,32,73,32,119,111,114,107,32,111,110,46,60,47,112,62,10,10,60,47,98,111,100,121,62,10,60,47,104,116,109,108,62,10])
Empty
Personally, I don't work in ghci that often so I don't care that much
if we have or don't have specialized Show instances for Vectors of
Word8s.
So what do other people think about this?
Actually, for my current use case of Bytestrings (binary encoding of
graphs using existing encoding schemes), I would prefer this
[Word8]-based Show instance as it would help with my debugging, since
the output looks along the lines of: Chunk (fromList
[3,2,3,0,3,1,3,0,2,2,1,0]).  I am the first to admit that my use case
is probably different from others though.
And I often work with mixed text/binary data (eg. text annotations in
video streams). I'd want the Show/Read instances to be in the form of
a hexdump with char representation alongside (like xxd or od -xc
output). It roundtrips well, so why not? :-)

Conrad.

Re: [Haskell-cafe] ANNOUNCE: vector-bytestring-0.0.0.0

Conrad Parker