How to Convert a String Array to an Int Array in C# Using LINQ in One Line?

One line of C# code to convert a string array into an integer array using LINQ

In programming, manipulating data in different formats is crucial. Here we have a situation: you have an array of integers stored as strings and need to convert it to a real array of integers for further processing.

LINQ (Language Integrated Query) provides a neat solution for this task. The Select method in LINQ allows you to transform each element in an array using a specified function. By using the int.Parse function, you can convert each string to its corresponding integer:

int[] myInts = arr.Select(int.Parse).ToArray();

This line of code completes the conversion in one line. It iterates over the array, parses each string into an int, and stores the result in a new array of integers.

There is an alternative using the ConvertAll method:

int[] myInts = Array.ConvertAll(arr, int.Parse);

This method works specifically with arrays and performs a similar conversion, but it requires an explicit lambda expression as the conversion function.

Finally, you can handle potential conversion errors gracefully using the int.TryParse function:

int[] myInts = Array.ConvertAll(arr,
    s =>
    {
        int j;
        return Int32.TryParse(s, out j) ? j : 0;
    });

This method ensures that any invalid string elements are replaced with a default value (0 in this case).

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