bytestring

问题 I'm struggling with an easy task. At least it looks like it should be, at first sight. I have a TextBox that contains HEX strings. They are always two hex digits in length (e.g. AA ). I want to convert textbox3.Text to a Byte . Here's what I have so far: Dim checking As String = textbox3.Text Dim a = Convert.ToByte(checking) RichTextBox1.Text = a.ToString But it throws a SystemFormatException . 回答1: The Convert.ToByte method provides an overload which takes a string argument followed by a

问题 I'm experimenting with the http-conduit library and have this simple example: #!/usr/bin/env stack {- stack --resolver lts-7.12 --install-ghc runghc --package http-conduit -} {-# LANGUAGE OverloadedStrings #-} import Network.HTTP.Conduit import Data.ByteString.Lazy.Internal getUrl :: IO (Data.ByteString.Lazy.Internal.ByteString) ---eeew! getUrl = do resp <- simpleHttp "http://www.stackoverflow.com" return resp I understand from this post that I should prefer a response as a ByteString to a

问题 In Python (3) at least, if a binary value has an ASCII representation, it is shown instead of the hexadecimal value. For instance, the binary value of 67 which is ASCII C is show as follows: bytes([67]) # b'C' Whereas for binary values without ASCII representations, they are shown in hex. I.E. b'\x0f' Is there a way to force Python to show the binary values in their binary-hex form (if this is what it is called), even when there are ASCII representations? Edit: By this I mean, something that

问题 In Python (3) at least, if a binary value has an ASCII representation, it is shown instead of the hexadecimal value. For instance, the binary value of 67 which is ASCII C is show as follows: bytes([67]) # b'C' Whereas for binary values without ASCII representations, they are shown in hex. I.E. b'\x0f' Is there a way to force Python to show the binary values in their binary-hex form (if this is what it is called), even when there are ASCII representations? Edit: By this I mean, something that

问题 I have a c# program with some bitmap datatypes which i would like to upload to my web server with HTTP. So i am thinking of converting the bitmap to the datatype bytes and then post it as text to the server, the sever would then save it as a image file. How would i do this in PHP? I am guessing something like this? but then how would i specify the save path location? <?php $data = 'iVBORw0KGgoAAAANSUhEUgAAABwAAAASCAMAAAB/2U7WAAAABl' . 'BMVEUAAAD///+l2Z/dAAAASUlEQVR4XqWQUQoAIAxC2/0vXZDr' .

问题 Both Network.Socket.ByteString and Network.Socket.ByteString.Lazy have a send function. Network.Socket.ByteString has a sendTo function, but Network.Socket.ByteString.Lazy doesn't. How can I use Network.Socket.ByteString 's sendTo with a Lazy.ByteString or Network.Socket.ByteString.Lazy 's send function. (i.e. how do I tell it where to send the packet.) Can anyone recommend a good tutorial on Haskell's Strings, BytesStrings. Lazy.ByteStrings, etc. as I find them very confusing (coming from a

问题 This question already has an answer here : Converting python string into bytes directly without eval() (1 answer) Closed last year . I'm trying to figure out how one might convert a string representation of a byte-string into an actual byte-string type. I'm not very used to Python (just hacking on it to help a friend), so I'm not sure if there's some easy "casting" method (like my beloved Java has ;) ). Basically I have a text file, which has as it's contents a byte-string: b'\x03\xacgB\x16

问题 I'm a Haskell newbie, and having a bit of trouble figuring out how to pattern match a ByteString . The [Char] version of my function looks like: dropAB :: String -> String dropAB [] = [] dropAB (x:[]) = x:[] dropAB (x:y:xs) = if x=='a' && y=='b' then dropAB xs else x:(dropAB $ y:xs) As expected, this filters out all occurrences of "ab" from a string. However, I have problems trying to apply this to a ByteString . The naive version dropR :: BS.ByteString -> BS.ByteString dropR [] = [] dropR (x

问题 I'm a Haskell newbie, and having a bit of trouble figuring out how to pattern match a ByteString . The [Char] version of my function looks like: dropAB :: String -> String dropAB [] = [] dropAB (x:[]) = x:[] dropAB (x:y:xs) = if x=='a' && y=='b' then dropAB xs else x:(dropAB $ y:xs) As expected, this filters out all occurrences of "ab" from a string. However, I have problems trying to apply this to a ByteString . The naive version dropR :: BS.ByteString -> BS.ByteString dropR [] = [] dropR (x

问题 I am learing Haskell Lazy IO. I am looking for an elegant way to copy a large file (8Gb) while printing copy progress to console. Consider the following simple program that copies a file silently. module Main where import System import qualified Data.ByteString.Lazy as B main = do [from, to] <- getArgs body <- B.readFile from B.writeFile to body Imgine there is a callback function you want to use for reporting: onReadBytes :: Integer -> IO () onReadBytes count = putStrLn $ "Bytes read: " ++