Question

i need your help on this one.

lets say:

public class myProduct
{
    public string Tags {get;set;} // Comma seperated values
}

List<myProduct> myProducts = WhatEver // Feeding the list products

List<long> capacity = WhatEverAlso // Feed the list long values from somewhere

now, what i want to do is order the myProducts list by capacity.

so , if a myProduct.Tags = “89,3,6”
and capacity = “1,2,3,4,5,6”

first will appear products with 1 in them, then 2 etc.

the problem is not ordering them, the problem actually is that some Tags do not contain capacity values.

EDIT:
for example, a products.tags could be “89,16,99”
so it does not contain any of the capacity values.
EDIT2:
I do not need to filter the products, just to order them.

EDIT3:
i started to with var foo = myProducts.OrderBy(p => p.Tags.Split(',').Intersect(capacity).OrderBy(c => capacity).Any());
and i feel that im close, but i cant figure out the rest. 🙁

hope you understood my question, my expression in english is not that good :\
feel free to ask me for any additional information.

Answer 1

The question isn’t entirely clear, but does this get you on the right track?

var ordered = 
    from p in myProducts
    let tags = p.Tags.Split(',').Select(long.Parse)
    let capIndices = 
        tags.Select(t => capacity.IndexOf(t))
        .Where(i => i >= 0)
    where capIndices.Any() // filter out products without capacity
    let capIndex = capIndices.Min()
    orderby capIndex
    select p;

This orders the products by the earliest location of any of its tags in the capacity list. If none of its tags are in the capacity list, a product is not included in the final results.