[RESOLVED] LINQ, oh the joy.

Code:

---

               
                private IEnumerable<string> GetAllInterfaces(Type[] interfaces)
                {
                        // Todo:
                        // The GetAllInterfaces method of the TypeWriter class returns a strongly
                        //  typed IEnumerable of strings containing the Name property of each of the
                        //  interfaces types contained in the interfaces parameter.
            return from interfaces in typeof(string).GetProperties()
                  where interfaces.Name == typeof(string)
                  select interfaces;
                }

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VS2008, 3.5.

I took a crack at the Todo and am completely off. Guidance please?

I would do it this way...

Code:

---

private IEnumerable<string> GetAllInterfaces(Type[] interfaces)
{
        return from i in interfaces select i.Name;
}

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I'm also new to LINQ so forgive me if it is wrong...:)

Quote:

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Originally Posted by nelo

I would do it this way...

Code:

---

private IEnumerable<string> GetAllInterfaces(Type[] interfaces)
{
        return from i in interfaces select i.Name;
}

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I'm also new to LINQ so forgive me if it is wrong...:)

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Aha! I came up with something similar, but now I am trying to do a little more complex LINQ statement and now am REALLY stuck.

Code:

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                private IEnumerable<string> GetAllMembers(Type type)
                {
                        // Todo:
                        // The GetAllMembers method of the TypeWriter class returns a strongly typed
                        //  IEnumerable of concatenated strings, one for each member of the type
                        //  parameter. Each string contains the member type and signature of the
                        //  related member, separated by a single space. The list is sorted first by
                        //  the member type, then by the name.
            return from MemberInfo items in type.GetMembers()
                  orderby items.GetType
                  select items.GetType + " ";
                        // Hint:
                        // You can get all the members of any type by calling the GetMembers
                        //  method of the Type class.

                        // Hint:
                        // You can obtain a member's signature by calling the ToString method
                        //  of the MemberInfo class.
                }

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That's what I have so far. What am I supposed to do about the memberinfo? Typecast? (confused)

Quote:

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Originally Posted by jgshojr

Aha! I came up with something similar, but now I am trying to do a little more complex LINQ statement and now am REALLY stuck.

Code:

---

                private IEnumerable<string> GetAllMembers(Type type)
                {
                        // Todo:
                        // The GetAllMembers method of the TypeWriter class returns a strongly typed
                        //  IEnumerable of concatenated strings, one for each member of the type
                        //  parameter. Each string contains the member type and signature of the
                        //  related member, separated by a single space. The list is sorted first by
                        //  the member type, then by the name.
            return from MemberInfo items in type.GetMembers()
                  orderby items.GetType
                  select items.GetType + " ";
                        // Hint:
                        // You can get all the members of any type by calling the GetMembers
                        //  method of the Type class.

                        // Hint:
                        // You can obtain a member's signature by calling the ToString method
                        //  of the MemberInfo class.
                }

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That's what I have so far. What am I supposed to do about the memberinfo? Typecast? (confused)

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Nevermind, items IS MemberInfo, thus items.ToString() works. DUH.

I would do it like this..

Code:

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private IEnumerable<string> GetAllMembers(Type type)
{
  from memberInfo in type.GetMembers()
  order by memberInfo.GetType().ToString()
  select String.Format("{0} {1}", memberInfo.GetType().ToString(), memberInfo.ToString())
}

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The description could have been clearer. I'm not sure if they member signature and member name mean the same thing...

I saw your post after I'd put mine. I don't need the GetType().ToString() after all...I'm glad you figured it out.