How do I combine two array into cohesive objects using Linq?

Question

I have the following two arrays

var employeeIds = new [] {1, 2, 3, 4};

var employeeNames = new [] {"Sarah", "Connor", "Julia", "Igor" };

I need to Zip them so I can combine the above to array such that the employeeId at index n is combined with employeeName at index n. So I can get anonymous objects like the following

combinedArrays.Select(items => new {Id = items.Item0, Name = items.Item1 });

How do I do that in Linq? If I could get Index in Linq, that would've done it but IEnumerable is not an ordered collection so there is no indexes.

Marco Fatica · Accepted Answer · 2015-11-13 18:11:28Z

6

You mentioned Zip - why not use that?

employeeNames.Zip(employeeIds, (name, id) => new { Id = id, Name = name });

MSDN for Enumerable.Zip: https://msdn.microsoft.com/library/dd267698(v=vs.100).aspx

Also, because you mentioned it you can access the index with the Select method if needed:

var employeeNames = new [] {"Sarah", "Connor", "Julia", "Igor" };
var indices = employeeNames.Select( (name, index) => index );

edited Nov 13, 2015 at 18:11

answered Nov 13, 2015 at 18:03

Marco Fatica

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3 Comments

fahadash Over a year ago

Damnit, there is a Zip in Linq to Enumerables?

Marco Fatica Over a year ago

@fahadash there sure is

Marco Fatica Over a year ago

@fahadash also because you mentioned it you can access the index with Select if needed. i edited my answer to show

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