CODEWITHSUNDEEP
c#hashset
user10432832
user10432832

Reputation:

Convert from IEnumerable to ISet

public override ISet<string> SetCellContents(string name)
{          
    HashSet<String> list = graph.GetDependents(name);
    return list;
}

Graph.getDependents(name) returns an IEnumerable of a HashSet<String>. I get an error:

"cannot convert from IEnumerable to ISet"

I am not sure what to do?

Upvotes: 2

Views: 1958

Answers (1)

Gilad Green
Gilad Green

Reputation: 37299

You should instantiate a new HashSet and pass it the graph.GetDependents(name) as input. In addition as GetDependents returns IEnumerable<HashSet<string>> then use SelectMany to flatten the inner collections before creating the new HashSet"

public override ISet<string> SetCellContents(string name)
{
    return new HashSet<string>(graph.GetDependents(name).SelectMany(hs => hs));
}

As a side note using the name list for something that is not a List<T> (or in general) is not a good practice. You could use something like dependenciesSet instead.

Upvotes: 5

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