OrderBy & GroupBy in C#

Sorting with tie-breaks and grouping by computed keys.

var words = new[] { "fig", "apple", "cherry", "date", "banana" };

var byLength = words.OrderBy(w => w.Length).ThenBy(w => w);
Console.WriteLine(string.Join(",", byLength));

foreach (var group in words.GroupBy(w => w.Length))
{
    Console.WriteLine($"{group.Key}: {string.Join(",", group)}");
}

How it works

1. OrderBy(...).ThenBy(...) sorts by length, then alphabetically.
2. GroupBy yields one group per key, each iterable on its own.
3. group.Key is the value the group was formed around.

Keywords and builtins used here

• foreach
• group
• in
• new
• string
• var

The run, in numbers

Lines

9

Characters to type

292

Tokens

80

Three-star pace

90 tpm

At the three-star pace of 90 tokens a minute, this run takes about 53 seconds.

Type this snippet

Step 2 of 3 in LINQ, step 23 of 29 in Language basics.

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