Whereas one approach is to implement the ICloneable interface (described here, so I won’t regurgitate), here’s a nice deep clone object copier I found on The Code Project a while ago and incorporated it into our code. As mentioned elsewhere, it requires your objects to be serializable. using System; using System.IO; using System.Runtime.Serialization; using System.Runtime.Serialization.Formatters.Binary; … Read more
TL;DR int *sieve = (int *) malloc(sizeof(int) * length); has two problems. The cast and that you’re using the type instead of variable as argument for sizeof. Instead, do like this: int *sieve = malloc(sizeof *sieve * length); Long version No; you don’t cast the result, since: It is unnecessary, as void * is automatically … Read more
C# language version history: These are the versions of C# known about at the time of this writing: C# 1.0 released with .NET 1.0 and VS2002 (January 2002) C# 1.2 (bizarrely enough); released with .NET 1.1 and VS2003 (April 2003). First version to call Dispose on IEnumerators which implemented IDisposable. A few other small features. … Read more
What differs is the locations in which the preprocessor searches for the file to be included. #include <filename> The preprocessor searches in an implementation-defined manner, normally in directories pre-designated by the compiler/IDE. This method is normally used to include header files for the C standard library and other header files associated with the target … Read more
static_cast is the first cast you should attempt to use. It does things like implicit conversions between types (such as int to float, or pointer to void*), and it can also call explicit conversion functions (or implicit ones). In many cases, explicitly stating static_cast isn’t necessary, but it’s important to note that the T(something) syntax … Read more
Setting a bit Use the bitwise OR operator (|) to set a bit. number |= 1UL << n; That will set the nth bit of number. n should be zero, if you want to set the 1st bit and so on upto n-1, if you want to set the nth bit. Use 1ULL if number … Read more
foreach(KeyValuePair<string, string> entry in myDictionary) { // do something with entry.Value or entry.Key }
Consider two libraries called Foo and Bar: using namespace foo; using namespace bar; Everything works fine, and you can call Blah() from Foo and Quux() from Bar without problems. But one day you upgrade to a new version of Foo 2.0, which now offers a function called Quux(). Now you’ve got a conflict: Both Foo … Read more
Several tips: Put inserts/updates in a transaction. For older versions of SQLite – Consider a less paranoid journal mode (pragma journal_mode). There is NORMAL, and then there is OFF, which can significantly increase insert speed if you’re not too worried about the database possibly getting corrupted if the OS crashes. If your application crashes the … Read more
You could use the String.IndexOf Method and pass StringComparison.OrdinalIgnoreCase as the type of search to use: string title = “STRING”; bool contains = title.IndexOf(“string”, StringComparison.OrdinalIgnoreCase) >= 0; Even better is defining a new extension method for string: public static class StringExtensions { public static bool Contains(this string source, string toCheck, StringComparison comp) { return source?.IndexOf(toCheck, … Read more