Finding values based on array index in List<string[]>

Question

I have an array structured like this:

{"nick", "sender", "message"}

arranged into a List<string[]>.

What I want to do, is to search the list using the 0 index value of the array (ie nick).

I tried using:

list.Find(i => i[0].Equals(nick))

but this doesn't seem to do anything.

How would I do this?

I have no idea what you mean.. why would you only want to search the first index position? Surely you would just do if(i[0] == nick) for that? — musefan
– musefan, Commented Oct 13, 2011 at 9:44
so I have a whole slew of values in this list, with lots of different nick values. this is for a memo system of sorts, so I want to retrieve every array from the list with the index 0 value equal to the nick i'm after. so, for example: {"sue", "bob", "dinner at 9"} {"joe", "bob", "park your car"} {"sue", "joe", "bob smells"} and I want the list to return the values which have the value "sue" in index 0 — Ephemeralis
– Ephemeralis, Commented Oct 13, 2011 at 9:45
What about using list.Where(i => i[0] == nick) then to get a list of string[] that contain nick at first index? — musefan
– musefan, Commented Oct 13, 2011 at 9:48
Your code works fine for me. (provided nick variable contains "nick"). — Joan Charmant
– Joan Charmant, Commented Oct 13, 2011 at 9:54

Jason Quinn · Accepted Answer · 2011-10-13 09:57:49Z

1

I think this what you want

list.Where(i => i[0] == "nick")

It will return a IEnumerable<string[]> where nick if the first element in each string[]

edited Oct 13, 2011 at 9:57

answered Oct 13, 2011 at 9:48

Jason Quinn

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Ephemeralis Over a year ago

This also works - though my original code turned out to be okay, displaying it elsewhere was the issue!

wiero · Accepted Answer · 2011-10-13 09:49:59Z

0

 list.Where(x => x[0].Equals(nick));

answered Oct 13, 2011 at 9:49

wiero

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wiero Over a year ago

@Gilad power of suggestion in question ;)

user159335 · Accepted Answer · 2011-10-13 09:56:34Z

I guess you're after:-

list.Find(i => i.Equals("nick"))

I'm also guessing that this isn't what you mean....

Perhaps you have something more like this:-

    static void Main(string[] args)
    {
        var test = new List<string[]>() {
                                            new String[3] { "a", "b", "b" }, 
                                            new String[3] { "a", "c", "c" }, 
                                            new String[3] { "b", "b", "c" }, 
                                            new String[3] { "a", "d", "d" }, 
                                            new String[3] { "x", "y", "z" } 
                                        };
        var foundFirst = test.Find(i => i[0].Equals("a"));
        var foundAll = test.Where(i => i[0].Equals("a"));
    }

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