![]() We use a stackalloc array to minimize memory allocations. To generate bool values, we provide an array containing all possible boolean values, along with a destination Span with length 1. The GetItems() accepts a ReadOnlySpan of possible values and then fills a Span with randomly selected items from it. NET/C# content and get paid? > JOIN US! << Wanna join Code Maze Team, help us produce more awesome. However, this time, we utilize the GetItems() method. The structure of the GetItemsGenerator class mirrors that of the previous NextDoubleGenerator and NextIntegerGenerator. Since it’s a generic method, it can also generate bool values: public class GetItemsGenerator(IRandomGenerator randomGenerator) : IBooleanGenerator ![]() Our next method in the toolbox is the GetItems() method, capable of generating an array of various types of elements. Generating a Random Boolean Using GetItems In this case, only the SystemRandomGenerator is suitable, as the CryptographyRandomGenerator does not implement the NextDouble() method. We are again implementing the IBooleanGenerator interface which accepts a random generator that implements the IRandomGenerator interface. Public bool NextBool() => randomGenerator.NextDouble() > 0.5 Therefore, we can return true if the generated number is greater than 0.5: public class NextDoubleGenerator(IRandomGenerator randomGenerator) : IBooleanGenerator The original generator always produces numbers between 0.0 and 1.0. We can apply a similar concept to floating-point numbers. Generating a Random Boolean Using Doubles The NextBool() method calls the underlying generator to produce an int, either 0 or 1, and from that, it constructs the bool value. This implementation of the IBooleanGenerator interface takes one of the random generators we discussed earlier as a parameter. NET/C# content and get paid? > JOIN US! randomGenerator.NextInteger(0, 2) = 0 Different classes will implement different algorithms, but they will implement the same interface: Implementing the same interface is advantageous for consistency and ease of comparison. NET built-in random generators, we’ve determined that the Random class offers the best performance in terms of speed. Generating Random Booleansīy measuring the speed of. Therefore, if cryptographic precision isn’t necessary for our task, it’s unsuitable for our purposes. RandomNumberGenerator proves to be more than 20 times slower in heavy usage scenarios. | CryptographyRandomGenerator | 1000 | 46.283 us | ![]() | SystemRandomGenerator | 1000 | 2.017 us | The results are clear and unmistakable: | Method | NumberOfIntegers | Mean | We do that using the RandomNumberGenerator and Random classes, and the implementation can be found by clicking on both links. Next, we need to create a concrete implementation of this interface. This interface will encompass all the methods required for various algorithms to generate random boolean values. Void GetItems(ReadOnlySpan choices, Span destination) Long NextLong(long fromInclusive, long toExclusive) Int NextInteger(int fromInclusive, int toExclusive) Let’s define the IRandomGenerator interface before proceeding: public interface IRandomGenerator We’ll demonstrate creating bool values from int, long, double, byte, and boolean array. However, they do provide a general-purpose method for generating an array of various values, including booleans. NET, random generators don’t offer a specific method for generating random boolean values. However, it’s worth noting that RandomNumberGenerator tends to be significantly slower than the Random generator. While cryptographically secure randomness might not be necessary in every scenario, it’s advisable to prioritize security whenever possible. We have explored the RandomNumberGenerator in greater detail in our Create Cryptographic Numbers With RandomNumberGenerator article. However, when dealing with security or cryptographic requirements, using the appropriate random generator, usually RandomNumberGenerator, is crucial. For most everyday programming tasks, we rely on the Random class.
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