How Can I Convert String Arrays to Integer Arrays in C# Using LINQ or Array.ConvertAll?

Convert an array of strings to an array of integers using LINQ or Array.ConvertAll

When processing data in programming, you often need to convert an array of strings into an array of integers. This can be achieved using the Array.ConvertAll method or LINQ's Select and ToArray functions.

Array.ConvertAll method

The

Array.ConvertAll method allows you to apply a transformation operation to each element of an array and return the result as a new array. To convert an array of strings to an array of integers, you can use the following syntax:

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

Here, the lambda expression s => int.Parse(s) is passed as a parameter to the ConvertAll method. This lambda expression takes a string s, parses it into an integer, and returns the converted integer. The resulting array of integers is stored in the myInts variable.

LINQ solution

Alternatively, you can use LINQ's Select and ToArray functions to convert an array of strings to an array of integers. The Select method applies the transformation operation to each element of the array, returning a new array containing the transformed values. The ToArray function converts the generated IEnumerable collection into an array. The syntax for this LINQ solution is as follows:

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

In this case, the Select method uses a lambda expression int.Parse to parse each element of the arr array and return the converted integer. The resulting ToArray collection is then converted into an array of integers using the IEnumerable function, and the result is stored in the myInts variable.

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