C#•15mo ago

❔ Foreach on two different lists

Hey i would like to know how to do a foreach loop for these two different lists where it can print out "aBook" and "aAuthor" in the same line, something like Console.WriteLine(aBook + " by " aAuthor) thank you in advance!

10 Replies

Angius•15mo ago

Well, it would be best if you simply structured your code differently Make a class Book that has a Title and Author property Have a list of those objects And loop over that If you really want to iterate over two lists at the same time, though, you'll have to do it with a for loop And take precautions in case one list is shorter than the other

MyselOP•15mo ago

interesting i tried to make a class but i was struggling to get user input to add a book

Angius•15mo ago

It shouldn't be hard

// we can use record instead of a class for brevity
record Book(string Title, string Author)

// we can use record instead of a class for brevity
record Book(string Title, string Author)

Console.WriteLine("Enter title of the book");
var title = Console.ReadLine();
Console.WriteLine("Enter it's author");
var author = Console.ReadLine();
var book = new Book(title, author);

listOfBooks.Add(book);

Console.WriteLine("Enter title of the book");
var title = Console.ReadLine();
Console.WriteLine("Enter it's author");
var author = Console.ReadLine();
var book = new Book(title, author);

listOfBooks.Add(book);

SWR•15mo ago

https://learn.microsoft.com/en-us/dotnet/api/system.linq.enumerable.zip?view=net-7.0#system-linq-enumerable-zip-3(system-collections-generic-ienumerable((-0))-system-collections-generic-ienumerable((-1))-system-func((-0-1-2)))

Enumerable.Zip Method (System.Linq)

Applies a specified function to the corresponding elements of two sequences, producing a sequence of the results.

Angius•15mo ago

Well, sure, you can zip them But the proper way to handle related data is... objects

SWR•15mo ago

Just another way to do exactly what you asked for. But yes, do a structure if you can

Angius•15mo ago

Classes, structs, records, etc I'd say use a class or a record Structs are used rarely, and only when you know you actually need a struct

MyselOP•15mo ago

omg thank you very much 🙏

Pobiega•15mo ago

You can even put complex objects in other objects.

record Author(string Name, DateOnly DateOfBirth);
record Book(string Title, Author Author);

record Author(string Name, DateOnly DateOfBirth);
record Book(string Title, Author Author);

Accord•15mo ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ Foreach on two different lists