bytearray

问题 I have two byte arrays - array1 and array2 . My aim is to copy the bytes from 1st array to second with respect to the start index of each array and fill the non filled bytes with a specific byte. byte[] array1 = new byte[5] The data is as follows: 11,22,00,33,44; byte[] array2 = new byte[10]; I need to copy the bytes from array1 to array2. The data needs to be copied from position 3 in array2 and fill the rest of the empty positions with value ff. ie my result in array2 would be {ff,ff,ff,11

问题 I am using Naudio and I have a stream which I need to read as array and then when I have found maximum I need to multiply each value with ( 1/ biggest ) and then I should have values in my array as [-1,1]. 回答1: I don't see really what you mean by "convert", but instead of the code you wrote you could just do: var bytes = stream.ToArray(); var biggest = (float)bytes.Max(); var floats = bytes.Select(b => b / biggest).ToArray(); This will result with floats between 0 and 1, since bytes are

问题 Greetings Overflowers, I love the flexibility of memory mapped files in that you can read/write any value type. Is there a way to do the same with byte arrays without having to copy them into for e.g. a memory map buffers ? Regards 回答1: You can use the BitConverter class to convert between base data types and byte arrays. You can read values directly from the array: int value = BitConverter.ToInt32(data, pos); To write data you convert it to a byte array, and copy it into the data:

问题 I'm trying to create a method that outputs MIDI information to a virtual client using CoreMIDI. The "action" method is MIDIReceived, which sends midi data in the form of MIDI packets to a virtual client. Below, I've created a method that accepts a MIDI byte as a parameter, which the method should add to a MIDI Packet List which is then sent to a virtual client with MIDIReceived. It doesn't work. I've tested this code without trying to use a custom method-- that is, manually inputing midi byte

问题 I am programming a socket server in Java for an MMORPG in AS3. I have some problems with strange behaviour of HashMap.get(byte[]). What things could cause the following problem? I don't use any serialization system, I send bytes and both client and server knows what to do with what bytes of the received bytes. The first request the client makes is asking the server to create a playing session. The server will generate a random session token as byte[] with 8 entries and adds the token to the

问题 today I am dealing with issue how to save byte array to SQLite database. When I am saving base[] to databse, it's looks like that property holding that array, but actually it is not save to database, when I restart application on device. Maybe I have to convert byte[] to base 64 before putting it to database? If yes, how I can do that? Also maybe there are another way save to sqlite database , without converting to base64? This is my object class: public class Unit { [PrimaryKey,

问题 I have a question about sending byte array in Android. i previous tried to use Android httpclient file upload data corruption and timeout issues but, i didn't really understand how to use it...... In my project, I previously used list of NameValuePair to send String type of data to Apache server such as In post method (DB_Packet is string variable) List nameValuePair = new ArrayList(2); nameValuePair.add(new BasicNameValuePair("content", DB_Packet)); nameValuePair.add(new BasicNameValuePair(

问题 I've developed an application to capture and save images to a database, but I'm having an issue with memory usage. On my domain object I have 3 properties: Image - Byte array, contents are a jpg RealImageThumb - The byte array converted to a BitmapImage and shrunk, displayed to the user in a gridview with other thumbnails RealImage - Has no setter, the byte array converted to a bitmap source, this is shown in a tooltip when the user hovers over it. The issue I have is that if a user hovers

问题 I just find in an experence share presentation from infoq. It claims that if you convert the String to byte[] in servlet, it will increase the QPS (Queries per Second?). The code example shows the comparison: Before private static String content = “…94k…”; protected doGet(…){ response.getWrite().print(content); } After private static String content = “…94k…”; Private static byte[] bytes = content.getBytes(); protected doGet(…){ response.getOutputStream().write(bytes); } Result before page

问题 I'm building an AngularJS Application, for Service I'm using .NET C# for coding purpose. I'm retrieving Images from SQL Server as Byte Array and I'm sending the Byte Array to AngularJS and it displays the Image in the HTML. I followed the same as like in the post Load image from C# Byte array and place image in html tag using AngularJS But I'm facing the performance issue in my data. My database contains the byte array size is approx. 2 to 3 MB. So, based on Internet Bandwidth its struggling