I\'m reading the paper Typed Logical Variables in Haskell, but I\'m failing to understand the details of the ultimate implementation. In particular, the backtracking state transformer introduced in se
Suppose that I have开发者_如何学Go the following (PostgreSQL) table definition: CREATE TABLE books (
I am not quite sure how to use the postgresqlConnect function in module Database.HaskellDB.HDBC.PostgreSQL to connect to a PostgreSQL database. The Haddock documentation page only states the type sign
I have a question about tuples and lists in Haskell. I know how to add input into a tuple a specific number of times. Now I want to add tuples into a list an unknown number of times; it\'s up to the u
I want to take something like 1/7 (0.142857142857...)开发者_如何学运维 and convert it to \"0.142857142857\" or \"142857142857\" [1,4,2,8,5,7,1,4,2,8,5,7]. Using
With hammar\'s help I have made a template Haskell bit which compiles $(zModP 5) to newtype Z5 = Z5 Int
I define my own version of concat, myConcat: module Eh where myConcat []= [] myConcat ([]:os)= myConcat os
Given that Perl 5 does not conform to BNF, I\'m at a loss as to how to think about this problem. Could someone offer some advice to set me off in the right way 开发者_如何学JAVAthinking about this pro
There are (de facto) standard web server interfaces for programming languages e.g. WSGI for Python, Rack for Ruby. Is there the equivalent thing for Haskell? I found two trials, Hack and HSGI, but am
I implemented a simple state machine in Python: import time def a(): print \"a()\" return b def b(): print \"b()\"
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