How Can LINQ Simplify Data Pivoting for Enhanced Readability?

Pivot Data with LINQ Simplicity

Transforming data into a more user-friendly format is often necessary. A common approach is pivoting, where data is restructured to display it in a grid-like manner. Imagine having a collection of items with an Enum and a User object. To visualize it in a grid, you need to flatten it.

LINQ provides an elegant solution for such scenarios. Let's start by grouping the data based on the Enum value, effectively creating columns.

var grps = from d in data
          group d by d.Foo
          into grp
          select new {
              Foo = grp.Key,
              Bars = grp.Select(d2 => d2.Bar).ToArray()
          };

Next, determine the total number of rows based on the maximum number of items in any column.

int rows = grps.Max(grp => grp.Bars.Length);

Finally, iterate through the columns and rows to construct the desired output.

foreach (var grp in grps) {
    Console.Write(grp.Foo + "\t");
}
Console.WriteLine();
for (int i = 0; i < rows; i++) {
    foreach (var grp in grps) {
        Console.Write((i < grp.Bars.Length ? grp.Bars[i] : null) + "\t");
    }
    Console.WriteLine();
}

This LINQ-based approach provides a concise and efficient way to pivot data, making it easy to display it in a more organized and informative manner.

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