小编Fop*_*tin的帖子

我可以在Eclipse的Android模拟器中将它连接到我的localhost Web服务器页面http://localhost或在http://127.0.0.1？

我已经尝试过了,但是仿真器仍然像Google搜索localhost一样接受我的请求,或者更糟糕的是它说我的网络服务器正常运行时没有找到该页面.

是否有一个函数来连接列表的元素与分隔符？例如:

> foobar " " ["is","there","such","a","function","?"]
["is there such a function ?"]

谢谢你的回复!

我开发了一个内核模块和一些函数.现在我需要在用户空间中开发一个程序并调用内核模块中的一些函数.

我还需要访问我的程序在用户空间的内核模块中的一些全局变量.

在我的一个学校项目中,我被要求创建一个不使用STL的程序.
在程序中我使用了很多

Pointer* = new Something;
if (Pointer == NULL) throw AllocationError();

我的问题是关于分配错误:
1.当分配失败时,是否有新的自动异常？
2.如果是这样,如果我没有使用STL( 3 #include "exception.h)我怎么能抓住它？是否
正在使用NULL测试？

谢谢.
我在Windows 7上使用eclipseCDT(C++)和MinGW.

我尝试haddock通过运行以下命令来安装,cabal install haddock但我遇到了以下问题.

leonzo@lion:~/opt$ cabal install haddock
Resolving dependencies...
Configuring haddock-2.11.0...
Building haddock-2.11.0...
Preprocessing library haddock-2.11.0...
unused terminals: 1
[ 1 of 31] Compiling Haddock.Backends.HaddockDB ( src/Haddock/Backends/HaddockDB.hs, dist/build/Haddock/Backends/HaddockDB.o )
[ 2 of 31] Compiling Haddock.Backends.Xhtml.Types ( src/Haddock/Backends/Xhtml/Types.hs, dist/build/Haddock/Backends/Xhtml/Types.o )
[ 3 of 31] Compiling Haddock.Convert  ( src/Haddock/Convert.hs, dist/build/Haddock/Convert.o )
[ 4 of 31] Compiling Paths_haddock    ( dist/build/autogen/Paths_haddock.hs,     dist/build/Paths_haddock.o )
[ 5 of 31] Compiling Haddock.GhcUtils ( src/Haddock/GhcUtils.hs, dist/build/Haddock/GhcUtils.o )
[ 6 of 31] Compiling Haddock.Version  ( …

下面是我想要在论文中包含的情节.问题是我的情节宽度很小(这使得x-axix根本不可读)

这是ggplot2代码myCode.r:

require("ggplot2")

all <- read.csv(file="benchmark/bench.query.csv", head=TRUE, sep=";")

w <- subset(all, query %in% c("sort.q1", "sort.q2", "sort.q3", "sort.q4", "sort.q5"))

w$rtime <- as.numeric(sub(",", ".", w$rtime, fixed=TRUE))

p <- ggplot(data=w, aes(x=query, y=rtime, colour=triplestore, shape=triplestore))
p <- p + scale_shape_manual(values = 0:length(unique(w$triplestore)))
p <- p + geom_point(size=4)
p <- p + geom_line(size=1,aes(group=triplestore))
p <- p + labs(x = "Requêtes", y = "Temps d'exécution (log10(ms))")
p <- p + scale_fill_continuous(guide = guide_legend(title = NULL))
p <- p + facet_grid(trace~type)
p <- p + …

标准前置函数中是否存在实现联合和集合的交集？

union      :: (Eq a) => [a] -> [a] -> [a]
intersect  :: (Eq a) => [a] -> [a] -> [a]

如果不是,有人可以说如果我的实现是有效的,(充分利用懒惰和前奏功能)

unionSet :: (Eq a) => [a] -> [a] -> [a]
unionSet as bs = foldl (\xs y -> if elem y xs then xs else xs ++ [y]) as bs

intersectSet :: (Eq a) => [a] -> [a] -> [a]
intersectSet as bs = let ns = [ a | a <- as, elem a bs] in [ …

我从haskell并行性开始,我已经成功地学会了如何使用一些策略:r0, rseq, rdeepseq, parList, parMap.现在我正在寻求更高的效率.所以这是我的问题:parList和之间有什么区别parBuffer？在哪些情况下,每个策略都有效？

我必须解析一个文件,确实必须先读取它,这是我的程序:

import qualified Data.ByteString.Char8 as B
import System.Environment    

main = do
 args      <- getArgs
 let path  =  args !! 0
 content   <- B.readFile path
 let lines = B.lines content
 foobar lines 

 foobar :: [B.ByteString] -> IO()
 foobar _ = return ()

但是,在汇编之后

> ghc --make -O2 tmp.hs 

使用7Gigabyte文件调用时执行会发生以下错误.

> ./tmp  big_big_file.dat
> tmp: {handle: big_big_file.dat}: hGet: illegal ByteString size (-1501792951): illegal operation

谢谢你的回复!

我在ubuntu 12.0.4上的postgresql中运行此查询:

SELECT t2.p AS prop, t2.o AS obj, COUNT(t2.o) AS num 
FROM "class_Event" AS t1, 
  ((SELECT s,p,o FROM "prop_sliceHasAnomaly")  
   UNION (SELECT s,p,o FROM "prop_eventHasDuration")  
   UNION (SELECT s,p,o FROM "prop_sliceHasEndEvent")  
   UNION (SELECT s,p,o FROM "prop_eventPrecedeInCPU")  
   UNION (SELECT s,p,o FROM "prop_eventFollowInTask")  
   UNION (SELECT s,p,o FROM "prop_topObjectProperty")  
   UNION (SELECT s,p,o FROM "prop_eventDetails")  
   UNION (SELECT s,p,o FROM "prop_switchTo")  
   UNION (SELECT s,p,o FROM "prop_eventIsExecutedOn")  
   UNION (SELECT s,p,o FROM "prop_runningAction")  
   UNION (SELECT s,p,o FROM "prop_anomalyHasSlice")  
   UNION (SELECT s,p,o FROM "prop_eventPrecedeInTrace")  
   UNION (SELECT s,p,o FROM "prop_sliceHasStartEvent") …