Generics is used to create “Type safe” collections like List, Map etc. It means that we can add only known/expected types to collections in order to avoid storing different data in one collection. For e.g //without generics ArrayList list = new ArrayList(); list.add(new Object()); list.add(new Interger()); list.add(new String()); //with generics ArrayList<String> list = new ArrayList<String>(); … Read more
Try the Random.NextBytes method https://docs.microsoft.com/en-us/dotnet/api/system.random.nextbytes?view=netframework-4.7.2 private byte[] GetByteArray(int sizeInKb) { Random rnd = new Random(); byte[] b = new byte[sizeInKb * 1024]; // convert kb to byte rnd.NextBytes(b); return b; } If you need cryptographically safe random bytes, use System.Security.Cryptography.RNGCryptoServiceProvider instead. 7 solved How to create byte array and fill it with random data [duplicate]
When arrays are passed into functions, they undergo array-to-pointer conversion. This means an array of type T[N] will simply decay into T*. Notice how the size information has been lost. All that remains is a pointer to the first element of the array. Here is a quote from the Standard: 4.2 Array-to-pointer conversion An lvalue … Read more
I edited my answer as it didn’t provide enough clarity as pointed out by a moderator as the source link I mentioned could run the risk of being deleted. If you need further clarity, the link will be in this explanation. Ok the a work around was using the guide of this user from here … Read more
Although this is not a Matrix class but rather a simple Vector2 class that accepts floats this class demonstrates how you can overload the operators. class Vector2 { public: union { float _f2[2]; struct { float _x; float _y; }; }; inline Vector2(); inline Vector2( float x, float y); inline Vector2( float *pfv ); // … Read more
You can’t do it in a completely portable way. Rather than dealing with int64_t, let us consider int8_t. The principle is almost exactly the same, but the numbers are much easier to deal with. I8_MAX will be 127, and I8_MIN will be -128. Negating I8_MIN will give 128, and there is no way to store … Read more
There is no difference what file you are reading opened in binary mode, there is only difference is how you should interpret the data you get from the file. It’s significantly better to take ready to use library like e.g. libjpeg or whatever. There are plenty of them. But If you really want to do … Read more
As explained in MSDN: Directory.CreateDirectory: You can create a directory on a remote computer, on a share that you have write access to. UNC paths are supported; Keyword here being “UNC paths”, which take the following form: \\server-name\share-name\[subdirectory-names\] So: Directory.CreateDirectory(@”\\server-name\share-name\NewFolder1″); 0 solved How to create folder on server pc in C# [duplicate]
Need to continuously send telemetry data over a network. Don’t really care who is going to get it, just need to send it out. Well, your sender need to know WHERE to send data to. Typically, a receiver would first send a request to your sender so it knows the receiver exists, and then your … Read more
I got the solution, I made a mistake in my INSERT query. It should be like this. string query=”INSERT INTO Company_Info2 VALUES (@UserName,@Cmp_Name,@Comm_Country, @Commercial_RegNo,@Cmp_DocPath, @Cmp_EstablishDate,@Cmp_Address,@IsAddress)”; solved Must declare the scalar variable “@lblCmpUserName”
It’s in your value assignment. An int of 00 always has value 0. If you want to always show two digits, you need to apply a format to your ToString() call int num = 00; string s= num.ToString(“D2”); That should do the trick. 1 solved How to convert an integer to its string representation adding … Read more
There are other possible characters after ‘z’ and below ‘a’ (ascii table), so it’s necessary to do both upper and lower bounds checks with &&. If you used the || operator then the statement could execute if the character were any value, because ALL characters are greater than ‘a’ or less than ‘z’. solved Can … Read more
I’ve read Your answers, search in books and changed whole idea of reading-writing 🙂 Now when I write I use: int stringSize=text.length()*sizeof(char); file.write(reinterpret_cast<char*>(&stringSize),sizeof(stringSize)); file.write(text.c_str(),stringSize); And when I read I use: int stringSize=0; string text; plik.read(reinterpret_cast<char*>(&stringSize),sizeof(stringSize)); char * tempCharArray = new char[stringSize+1]{}; plik.read(tempCharArray,stringSize); text=tempCharArray; delete [] tempCharArray; No segmentation fault/access violation since then 🙂 I guess … Read more
Use .FirstOrDefault() to get the first element matching your Where(), or null when none match: var oCustomer = oCust.Where(x => x.CountryCode == “US”).FirstOrDefault(); also discuss how to solve the above scenario using auto mapper with sample code. You’ve done this under various of your questions: “Here is my question, oh and please explain this related … Read more
There is a good reason for the standard library to start internal names with two underscores: Such names are reserved for the implementation. Imagine you write the following code: #include <iostream> using namespace std; long square(long x) { return x*x; } int main() { cout << square(3) << endl; } I guess you would not … Read more