CODEWITHSUNDEEP
c#
thersch
thersch

Reputation: 1396

How to convert an array to a double so big array?

I have an element type:

public class FieldInfo
{
  public string Label { get; set; }
  public string Value { get; set; }
}

And I have an array filled with FieldInfo objects.

FieldInfo[] infos = new FieldInfo[]
                      {
                        new FieldInfo{Label = "label1", Value = "value1"},
                        new FieldInfo{Label = "label2", Value = "value2"}
                      };

Now I want to convert that array to a new one that contains following values:

string[] wantThatArray = new string[] {"label1", "value1", "label2", "value2"};

Is there a short way to do the conversion from an array like infos to an array like wantThatArray?
Maybe with LINQ's Select?

Upvotes: 2

Views: 160

Answers (5)

Arthis
Arthis

Reputation: 2293

another variant:

string[] yourarray = infos.Select(x => string.Format("{0},{1}", x.Label, x.Value))
                          .Aggregate((x, y) => string.Format("{0},{1}", x, y))
                          .Split(',');

mhh but not nice.. :( compared to the others !

Upvotes: 0

Andrei
Andrei

Reputation: 56688

string[] wantThatArray = infos
    .SelectMany(f => new[] {f.Label, f.Value})
    .ToArray();

Upvotes: 10

Olivier Jacot-Descombes
Olivier Jacot-Descombes

Reputation: 112372

A slightly different variant to Marc Gravell's solution

string[] wantThatArray = new string[infos.Length * 2];
for (int i = 0, k = 0; i < infos.Length; i++, k += 2) {
   wantThatArray[k] = infos[i].Label;
   wantThatArray[k + 1] = infos[i].Value;
}

Upvotes: 2

Vishal Suthar
Vishal Suthar

Reputation: 17194

FieldInfo[,] infos = new FieldInfo[,]{
                    new FieldInfo{"label1", "value1"},
                    new FieldInfo{"label2", "value2"}
                  };

string[] to = infos.Cast<FieldInfo>().ToArray();

Now you can simply convert to to infos.

Upvotes: -1

Marc Gravell
Marc Gravell

Reputation: 1062865

I would keep it simple:

string[] wantThatArray = new string[infos.Length * 2];
for(int i = 0 ; i < infos.Length ; i++) {
   wantThatArray[i*2] = infos[i].Label;
   wantThatArray[i*2 + 1] = infos[i].Value;
}

Upvotes: 8

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