How Can I Auto-Populate C# Arrays with Non-Default Values?

Auto-Populating C# Arrays with Non-Default Values

In C#, uninitialized arrays of value types are automatically seeded with their respective default values (e.g., 0 for int, false for bool). However, is it possible to bypass this and set a custom seed value for all elements?

Using Array.Fill()

Java's Arrays.fill() method is not available in C#, so the iterative approach with a for loop remains the standard method. Iterating over the array might seem inefficient, but it's the optimal solution when directly manipulating the underlying memory.

Alternative Approach

Despite the lack of a built-in method, there's an alternative approach using LINQ (Language Integrated Query):

bool[] abValues = Enumerable.Repeat(true, 1000000).ToArray();

This approach leverages the Repeat() and ToArray() methods to generate a sequence of true values repeated 1,000,000 times and then convert it into an array. This method ensures that all elements are set to true before the array is initialized. It's worth noting that using LINQ may introduce additional overhead compared to the iterative approach.

Memory Allocation Considerations

As suspected, the default values are ingrained in C#'s memory allocation process for arrays. However, using the Repeat() method effectively circumvents this behavior by creating a new array with the desired values, bypassing the automatic initialization.

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