logo
Tags down

shadow

Reading from stream to initialize a read-only variable


By : andreadale
Date : July 30 2020, 04:00 PM
With these it helps Unfortunately, what you are trying to do is not possible because of the limitations of the istream interface, which works with non-const references. The best way to "add const" to a variable after it is modified is to use a helper function (or lambda):
code :
template <typename T, typename CharT, typename Traits>
T read_from(std::basic_istream<CharT, Traits>& is)
{
    T value;
    is >> value;
    return value;
}
const auto token = read_from<std::string>(in);


Share : facebook icon twitter icon

C#: how to read a line from a stream and then start reading it from beginning?


By : user3396770
Date : March 29 2020, 07:55 AM
To fix the issue you can do I found the answer to my question here:
How can I read an Http response stream twice in C#?
code :
Stream responseStream = CopyAndClose(resp.GetResponseStream());
// Do something with the stream
responseStream.Position = 0;
// Do something with the stream again


private static Stream CopyAndClose(Stream inputStream)
{
const int readSize = 256;
byte[] buffer = new byte[readSize];
MemoryStream ms = new MemoryStream();

int count = inputStream.Read(buffer, 0, readSize);
while (count > 0)
{
    ms.Write(buffer, 0, count);
    count = inputStream.Read(buffer, 0, readSize);
}
ms.Position = 0;
inputStream.Close();
return ms;
}

c# - how using buffered stream is different than reading same number of bytes using read method on source stream?


By : Jerry
Date : March 29 2020, 07:55 AM
This might help you When reading from many data sources (such as files), the slowest part of the operation is often the execution of each individual read request. So the key is to reduce the number of requests saying 'give me N bytes of data from source XXX'.
In the case of file access, it's very likely to be more efficient to do 1 read of 10 MB than it is to do 10 reads of 1 MB.

C# - Stream.Read reading null bytes


By : jedd
Date : March 29 2020, 07:55 AM
Hope that helps The 0x00 bytes were not actually received, they were never written to.
Stream.Read() returns the number of bytes actually read, which is in your case often less than BufferSize. Small amounts of data typically arrive in a single message, in which case the problem does not occur.
code :
int remaining = ContentLength;
int offset = 0;  
while (remaining > 0)
{
    int bytes = _Stream.Read(ByteArray, offset, remaining);
    if (bytes == 0)
    {
        throw new ApplicationException("Server disconnected before the expected amount of data was received");
    }

    offset += bytes;
    remaining -= bytes;
}

Node.js read stream not reading properly from file


By : Jirka Pecka
Date : March 29 2020, 07:55 AM
hope this fix your issue It is the contents of your file, just in byte notation. Try this to get it back:
code :
file_stream.on('readable', () => {
  var buf = file_stream.read()
  if (buf != null) {
    console.log('readable:', buf.toString());
  }
});

Reading A stream through stream.read instead of using a StreamReader


By : Robert Yang
Date : March 29 2020, 07:55 AM
Any of those help That's because you haven't created the byte array that you try to use.
Related Posts Related Posts :
  • How can I store all data the user inputs and then show them if they want to see all of them
  • Use depth texture in compute shader
  • error: conflicting declaration using universal references
  • Using std::optional instead of own structure
  • Is it necessary to make pointer Null when there is no use of it at the end in c++
  • How are std::array's compared in C++?
  • Herb Sutter's article on making virtual functions private
  • Interaction between copy-and-swap idiom and move operations
  • Problems using overloaded extraction operator in C++
  • segmentation fault on reading certain files, seems to be unrelated to filesize
  • Protected members of base classes inaccessible to friends of derived classes
  • Constructing smart pointer from stack allocated raw pointer
  • Array Index Overload Bug
  • Why I'm getting " void value not ignored as it ought to be"?
  • Need help converting a string to a char in c++ ---- ERROR A value of type "const char *" cannot be used to ini
  • What means put preprocessor in std::string?
  • Is it possible to compare an array elements with a hard-coded initializer list without loop?
  • Complexity of an specific algorithm with 3 for?
  • Character converting funtion std::isupper() & std::islower() C++17
  • Hide method taking template parameter reference in cpp file
  • Disable the std::initializer_list constructor
  • What does "static_cast<double>(123)" mean in C++?
  • How to use libraries (*.a files) in C++ when using cmake
  • Use class name for conditional macro expansion
  • C++ variable names (can declare main as variable however same is not true for other functions name)
  • error: ‘nullptr’ was not declared in this scope
  • Why is the z coordinate flipped after multiplying with a matrix in GLSL - OpenGL
  • QML use C ++ function with parameters
  • How can I convert a character from a string into a integer variable using C++
  • Can range-v3 contains work on initializer list?
  • How would I calculate the runtime of this function?
  • Is there a way to produce random numbers simultaneously in c++? If not, is there a work around?
  • How do you create a dynamic array for struct elements of different variable types for c++?
  • Subclass address equal to virtual base class address?
  • _mm_xor_pd fails with product = 0
  • I got a stack overflow error in my int main()
  • Why does imwrite on BMP image gets stuck / does not return?
  • Why program throws runtime error while iterating over an emtpy vector in c++
  • Unknown error while debugging a QT-application with Visual Studio Code and CMake-Tools
  • Is `string.assign(string.data(), 5)` well-defined or UB?
  • Modern way to have a map that can point-to or reference data of different types that has been allocated on the stack
  • Why does my recursive function print in descending order and then in ascending order?
  • Fill vector with true value
  • Automate "yes" to Popen SSH command
  • warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
  • What is wrong in this C++ code snippet with template<class Vector>
  • Printing hollow square with array
  • Overload -> arrow operator in shared_ptr<interface> instance with no pure virtual destructor in interface
  • Run thread with derived method from base class without using templates
  • Issues with template class conversion - unable to deduce function called
  • How is memory deallocated in c++
  • is it possible to reduce delete code size with templates in C++
  • How to resolve Ninja c++ build and execution
  • Trying to control multithreaded access to array using std::atomic
  • Checking which object called the other's object method
  • How do we run a single test using Google bazel
  • Should I add other files to git except .cpp?
  • Idiom for handling size_t underflow in loop condition
  • What is Kotlin for C++ push_back() and pop_back() on a string?
  • Tree implementation in C++: Cannot convert Node to int* Ask Question
  • shadow
    Privacy Policy - Terms - Contact Us © voile276.org