Using an array of named tuples in LINQ

Question

I'm trying to use an array of named tuples in a LINQ (LINQ-to-object) query like this:

(int from, int to)[] inputRanges = { (1,2), (3,4) };

var result = from range in inputRanges
             select Enumerable.Range(range.from, range.to - range.from + 1);
return result.SelectMany(x => x);

However, I receive a compiler error, telling me that range has no member from and it instead expected a comma , instead of .from.

What am I doing wrong? Are named tuples and LINQ-to-objects not combinable?

If I use .Item1 and .Item2 instead it works - are named tuples a problem for LINQ? Why? — D.R.
– D.R., Commented Nov 15, 2018 at 18:35

Gilad Green · Accepted Answer · 2018-11-15 18:51:03Z

4

The problem is that from is a keyword used by linq for iterating the items of the collection (from item in collection ...).

To solve it use @from in the linq:

var result = from range in inputRanges
             select Enumerable.Range(range.@from, range.to - range.@from + 1);

For more about the @ see: C# prefixing parameter names with @ . IMO the use of the property name from in this case is ok, but I do think in general this would be a bad practice.

answered Nov 15, 2018 at 18:51

Gilad Green

37.3k7 gold badges67 silver badges99 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

D.R. Over a year ago

Oh boy...hahaha, thanks. I would have looked for another year without realizing it :D

Gilad Green Over a year ago

@D.R. - :) glad it helped you

Collectives™ on Stack Overflow

Using an array of named tuples in LINQ

1 Answer 1

2 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related