Reduce in Visual Basic .NET

In Visual Basic .NET, we can reduce an array to a single value using the Aggregate function. The Aggregate function applies an accumulator function to each element of an array and produces a single result.

Here's an example of reducing an array of integers to find its sum:

``vb.net Dim numbers() As Integer = {1, 2, 3, 4, 5}


Dim sum As Integer = numbers.Aggregate(Function(acc, n) acc + n)
Console.WriteLine("Sum: " & sum)

Output:



Sum: 15

In this example, the Aggregate function takes two arguments: an accumulator function and an optional seed value. In this case, the accumulator function is a lambda expression (Function(acc, n) acc + n) that adds the accumulator (acc) to the current element (n), and the seed value is not provided, so the first element of the array is used as the initial value of the accumulator.
We can also use the Aggregate function to find other values, such as the maximum:

vb.net

Dim numbers() As Integer = {1, 2, 3, 4, 5}
Dim max As Integer = numbers.Aggregate(Function(acc, n) If(n > acc, n, acc))
Console.WriteLine("Max: " & max)

Output:



Max: 5



In this example, the accumulator function is a lambda expression

(Function(acc, n) If(n > acc, n, acc)) that returns the maximum of the accumulator (acc) and the current element (n`), and the seed value is not provided, so the first element of the array is used as the initial value of the accumulator.

Reduce in Visual Basic .NET

See this concept in other languages