byte

问题 Please take a look at below example i cant understand the relation between char and byte byte b = 1; char c = 2; c = b; // line 1 Give me compilation Error because c is type of char and b is type of byte so casting is must in such condition but now the tweest here is when i run below code final byte b = 1; char c = 2; c = b; // line 2 line 2 compile successfully it doesn't need any casting at all so my question is why char c behave different when i use final access modifier with byte 回答1:

问题 I'm trying to convert a network image into a file and the first part of that is to convert it into a Uint8List. Here is how I'm doing this with 1 of my asset images... final ByteData bytes = await rootBundle.load('assests/logo'); final Uint8List list = bytes.buffer.asUint8List(); final tempDir = await getTemporaryDirectory(); final file = await new File('${tempDir.path}/image.jpg').create(); file.writeAsBytesSync(list); How can I do this with Image.network(imageUrl.com/image) 回答1: void

问题 SignalR loses many messages when I transfer chunks of bytes from client over server to client (or client to server; or server to client). I read the file into a stream and sent it over a hub or persistent connection to other client. This runs very fast, but there are always messages dropped or lost. How can I transfer large files (in chunks or not) from client to client without losing messages? 回答1: As @dfowler points out, it's not the right technology for the job. What I would recommend

问题 How can I read a file to bytes in Java? It is important to note that all the bytes need to be positive, i.e. the negative range cannot be used. Can this be done in Java, and if yes, how? I need to be able to multiply the contents of a file by a constant. I was assuming that I can read the bytes into a BigInteger and then multiply, however since some of the bytes are negative I am ending up with 12 13 15 -12 etc and get stuck. 回答1: Well, Java doesn't have the concept of unsigned bytes... the

问题 I'm trying to load dll libraries during runtime using the following code so that I don't have to provide the user with lot of dll files along with the main executable file. I have inlude all the dll files as an embedded resource and also in the reference part I have include them and have set the CopyLocal property to false. But the problems here are: 1. All the dll are getting copied to Bin\Debug folder 2. I'm getting FileNotFoundException . I did lot of searches to get these things resolved

问题 I've been a programmer for a few years now, but I've never had to understand low-level operations involving bytes. It interests me however, and I would like to understand more about working with bytes. In the below code I'm reading a text file that contains only the words "hi there". FileStream fileStream = new FileStream(@"C:\myfile.txt", FileMode.Open); byte[] mybyte = new byte[fileStream.Length]; fileStream.Read(mybyte, 0, (int)fileStream.Length); foreach(byte b in mybyte) Console.Write(b)

问题 I've been a programmer for a few years now, but I've never had to understand low-level operations involving bytes. It interests me however, and I would like to understand more about working with bytes. In the below code I'm reading a text file that contains only the words "hi there". FileStream fileStream = new FileStream(@"C:\myfile.txt", FileMode.Open); byte[] mybyte = new byte[fileStream.Length]; fileStream.Read(mybyte, 0, (int)fileStream.Length); foreach(byte b in mybyte) Console.Write(b)

问题 This is for a modern cryptography class that I am currently taking. The challenge is the cryptopals challenge 3: Single-Byte XOR Cipher, and I am trying to use python 3 to help complete this. I know that I am supposed to XOR the string and converted to English. The hex string is "1b37373331363f78151b7f2b783431333d78397828372d363c78373e783a393b3736" which converts to "806748453371902409051174291875458592743800337585421566549206796642836053682239286" in decimal form. I have XOR'd this against

问题 I want to allow a user to enter a file size, using any of the standard suffixes (such as TB, MB, GB) I'd like to get the value in a way that i can compare them to a folder size. The idea is to have a program that'll warn if a folder gets above a certain size, with the size dictated by a user-inputted string. Is there anything built into the .net framework that allows me to parse strings such as 1.5TB , 400GB , 1.9GB and 0.5KB ? 回答1: This is a good candidate for a simple Interpreter. Code like

问题 I'm just beginning to learn about file compression and I've run into a bit of a roadblock. I have an application that will encode a string such as "program" as a compressed binary representation "010100111111011000" (note this is still stored as a String). Encoding g 111 r 10 a 110 p 010 o 011 m 00 Now I need to write this to the file system using a FileOutputStream , the problem I'm having is, how can I convert the string "010100111111011000" to a byte[] / byte s to be written to the file