Pairing up two arrays (the zip operation)

This lesson covers pairing two arrays with VB.NET's Zip method, with the aim of handling related data together.

Zip() pairs the elements at matching positions in two arrays or lists to build a new list. It is handy when two pieces of data correspond — an array of names and an array of scores.

The sample code pairs the elements at matching positions of names and scores with names.Zip(scores, Function(n, s) $"({n}, {s})"), assembling a readable form with the $"..." interpolation.

A common early stumble is what happens when the two arrays are different lengths. Zip() stops at the shorter one, so anything left over is simply not in the result.

In professional work, a Zip-like operation is used constantly for processing related lists together — product names with prices, labels with values.

📖 Reference code

Dim names() As String = {"Alice", "Bob", "Charlie"}
Dim scores() As Integer = {88, 95, 72}

Dim pairs = names.Zip(scores, Function(n, s) $"({n}, {s})")
Console.WriteLine(String.Join(", ", pairs))

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