Compare sub strings in a List of strings

T K

11y1.3kLINQ

I have declared following List of strings-

List lstfruits= new List(){

{ "apple-2015.05.18.html" },
{ "apple-1997.01.11.html" },
{ "mango-2013.02.12.html" },
{ "peach-2015.04.12.html" },
{ "peach-1998.11.12.html" },
{ "other-2013.02.12.html" },

};

I need to match all records which contain 'apple'. Below are the results that I want-

"apple-2015.05.18.html"

"apple-1997.01.11.html"

I wrote below , but it returns zero results-

var items = lstfruits.Where(pp => pp.Substring(0, pp.IndexOf('-')) == "apple");

Please help where I am wrong.

8 Replies

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T K11y ago
Thanks all for your replies. However, have achieved using below-

List items = lstfruits.Where
(pp => System.IO.Path.GetFileNameWithoutExtension(pp).Substring(0, System.IO.Path.GetFileNameWithoutExtension(pp).IndexOf('-')) == "apple").ToList();
0
Upendra Pratap Shahi11y ago
Use this code

public void ListSeperation()
{
List lstfruitName = new List();
List lstfruits = new List(){
{ "apple-2015.05.18.html" },
{ "apple123-1997.01.11.html" },
{ "apple-1997.01.11.html" },
{ "mango-2013.02.12.html" },
{ "peach-2015.04.12.html" },
{ "peach-1998.11.12.html" },
{ "other-2013.02.12.html" },
};
string distinctby = "apple";
lstfruits = lstfruits.Where(diff => diff.Contains(distinctby)).ToList();
foreach (var item in lstfruits)
{
if (item.Split('-')[0].Length == distinctby.Length)
{
lstfruitName.Add(item);
}
}
string replaced = "";
replaced = "'" + string.Join(",", lstfruits.ToArray()).Replace(",", "','") + "'";
lbltest.Text = replaced;
}

0
Saroj Kumar Sahu11y ago
Then you can use

List items = lstfruits.Where(pp => pp.Substring(0, pp.IndexOf('-')).Equals("apple")).ToList();

Or

List items = lstfruits.FindAll(x => x.Contains("apple-"));
+1
Sreekanth Reddy11y ago
Foreach(var a in lstfruits)
{
if(a.SubString(0,a.IndexOf("-")=="apple")
{
console.writeline(a);
}
}
0
Bhushan Bhasme11y ago
hi T.k
If Ia m Not Misunderstood You need To do like this something
List lstfruitName = new List();
List lstfruits = new List(){

{ "apple-2015.05.18.html" },
{ "apple123-1997.01.11.html" },
{ "apple-1997.01.11.html" },
{ "mango-2013.02.12.html" },
{ "peach-2015.04.12.html" },
{ "peach-1998.11.12.html" },
{ "other-2013.02.12.html" },

};
string a = "apple";
lstfruits = lstfruits.Where(m => m.Contains(a)).ToList();
foreach (var item in lstfruits)
{
if (item.Split('-')[0].Length == a.Length)
{
lstfruitName.Add(item);
}
}
//--------------------OR-----
lstfruits = lstfruits.Where(m => m.Contains(a)).ToList();
foreach (var item in lstfruits)
{
if(item.Substring(0,item.IndexOf('-'))=="apple")
{
lstfruitName.Add(item);

}
}
//===============OR------------
lstfruits = lstfruits.Where(m => m.Substring(0,m.IndexOf('-'))=="apple").ToList();
}
Hope This Will Help You
0
T K11y ago
I need an exact match, hence cannot use 'contains'. The lstfruits can contain itmes like "appleAA-2015.05.18.html". I do not want such a result !!
0
Saroj Kumar Sahu11y ago
Hi,
There is no wrong with your code.this is working. if not try the below code:

List items = lstfruits.Where(pp => pp.Substring(0, pp.IndexOf('-')) == "apple").ToList();
OR
List items = lstfruits.FindAll(x => x.Contains("apple"));

0
Sreekanth Reddy11y ago
use foreach for passing through all items.
Foreach(var a in lstfruits)
{
   if(a.contains("apple")
   {
      console.writeline(a);
   }
}
0