binary-data

问题 I need to do the following in JavaScript and so far been unable to find solutions to do it seamlessly: Grab two integers in a specific order and pack them like Python's struct module. This packed value, (bonus for supporting different endianness than host) will be turned into a 64 bit float (double). They must be arbitrary thus I might get an exponent representation of the integer (say, they could be 0xdeadbeef and 500): In exp form: 1.0883076389305e-311 1.0883076389305000 * 10 ^ - 311 I need

问题 In Swift 3.x, we usually handle binary data using Data ; from it you can generate most other important types, and there are useful functions on it. But how do I create a Data from an InputStream ? Is there a nice way? 回答1: I could not find a nice way. We can create a nice-ish wrapper around the unsafe stuff: extension Data { init(reading input: InputStream) throws { self.init() input.open() defer { input.close() } let bufferSize = 1024 let buffer = UnsafeMutablePointer<UInt8>.allocate

问题 Well i have a byte array, and i know its a xml serilized object in the byte array is there any way to get the encoding from it? Im not going to deserilize it but im saving it in a xml field on a sql server... so i need to convert it to a string? 回答1: You could look at the first 40-ish bytes 1 . They should contain the document declaration (assuming it has an document declaration) which should either contain the encoding or you can assume it's UTF-8 or UTF-16, which should should be obvious

问题 This question already has answers here : Generate a dummy-variable (16 answers) Closed 2 years ago . I have a medium large dataframe, for which I want to transform one column with categories to binary columns, one for each category. At the same time, I want to keep the rest of the columns in the dataframe. What would be the easiest way to achieve this? Here is an example of what I want to do: d<-data.frame(ID=c("a","b","c","d"), Gender=c("male", "male", "female","female"), Age =c(23,45,18,11)

问题 We are looking for an algorithm with the following criteria. Input is an arbitrary positive integer ( n ), that represents the length of the compare subsequences. We search the longest binary sequence, which contains no equal n-length subsequences. Matched equal sequences can be overlapped (also an interesting problem when matches must be disjoint). Output will be this sequence of bits. For example, if n = 3 : 10111010 is invalid because of the repeating 101 subsequences. 01010 is also

问题 I created code for converting binary data to pdf my aim is to show error message when date is not avalable in sql otherwise it should pdf file can anyone help me how to do. 回答1: If you want to show the message on pdf itself then Using sdr As SqlDataReader = cmd.ExecuteReader() if sdr.hasrows then sdr.Read() pdf = DirectCast(sdr("BinaryData"), Byte()) ID = sdr("RunId").ToString() else pdf = DirectCast("No Data Found", Byte()) end if 回答2: You might wanna try this Dim csname1 As String =

问题 So I have binary FRX files, from which I need to extract strings into Java. I wrote this into my Java program like so: FileInputStream ReadFRX = null ; FileOutputStream TempCapt = null ; try{ // refNum is hex number on end of VB form property converted to decimal, ex: $"frmResidency.frx":0134 int refNum = Integer.parseInt(line.substring(line.length() - 4, line.length()), 16); // FRXtemp.txt is created, to temporarily write FRX captions onto to be read from. PrintWriter writer = new

问题 I am trying to execute a binary wrapped inside my own assembly code, there are reasons like i want to do some init and see how the binary behaves, however i am unable to execute the binary even without any such init, no output on uart, lcd (I am running an arm cortexa-8 based qsd8250b chipset powering a mdp[mobile development platform]) I know the wrapped binary runs perfectly on my board since i have used it earlier (less than a day ago). Problem is, i am unsure/info is not available

问题 I am working on a project that requires a client to de-crypt binary data received from the server. The scenario is that a server has binary data in a compressed and encrypted form. The browser needs to receive this data (files), decrypt and decompress them and then download them to a user-specified location on the local machine. I understand that their are several limitations of doing this in the browser - Does Javascript have access to the local storage. Can I write/stream multiple files to

问题 We are storing some video files as binary in NoSQl database, NoSQL database exposes Rest API to read data from database. We are able to receive the binary data (with no file extension) from RestAPI, but web browser starts to download the file instead of playing it in the browser. I want to play the binary data as video on web browser instead of downloading. 来源： https://stackoverflow.com/questions/41256777/how-to-play-binary-data-video-file-on-web-browser-which-is-received-from-resta