I've got a list of strings called xyz the string has this structure iii//abcd, iii//efg. how can I loop through this list and remove only iii// ?
I have tried this but it remove everything. thanks
string mystring = "iii//";
xyz.RemoveAll(x=> x.Split ('//')[0].ToString().Equals (mystring));
Removing all the strings who start with iii//:
xyz.RemoveAll(x => x.StartsWith(#"iii//"));
Removing the iii// from all strings:
var newList = xyz.Select(x => x.Replace(#"iii//", string.Empty)).ToList();
You can try this also which will remove the string from list if it starts with "iii/" other wise not.
string mystring = "iii//";
xyz.RemoveAll(x=>x.StartsWith(mystring));
I believe OP wants something to remove iii// from all strings:
string prefix = "iii///";
List<string> xyz = ...;
var result = xyz.Select(x => x.Substring(prefix.Length)).ToList();
Note: this of course assumes that each string really starts with prefix.
Related
I have list of string
Like list1 contain 'pinky','smita','Rashmi','Srivani'
And string is like
String str = "pinky, Nandini'
I want to check if neither of str present in list1,proceed further.
how to do that?
If I understood correctly, you want to return false in the example case, so you can use Any method: Check if none of the elements of the list is already in the str, here is a one liner:
if (!list.Any(x=>str.Contains(x))) ....
You can use combination of .Any() with .Contains() with !,
var list1 = new List<string>(){ "pinky", "smita", "Rashmi", "Srivani" };
string str = "pinky, Nandini";
var list2 = str.Split(",");
var nameExists = list2.Any(x => list1.Contains(x));
if(!nameExists)
{
//Your code goes here.
}
As #Fildor said, you can use Intersect(). Elegant approach,
//All credit goes to #Fildor
var nameExists = list1.Intersect(list2).Any();
I have a list like so and I want to be able to search within this list for a substring coming from another string. Example:
List<string> list = new List<string>();
string srch = "There";
list.Add("1234 - Hello");
list.Add("4234 - There");
list.Add("2342 - World");
I want to search for "There" within my list and return "4234 - There". I've tried:
var mySearch = list.FindAll(S => s.substring(srch));
foreach(var temp in mySearch)
{
string result = temp;
}
With Linq, just retrieving the first result:
string result = list.FirstOrDefault(s => s.Contains(srch));
To do this w/o Linq (e.g. for earlier .NET version such as .NET 2.0) you can use List<T>'s FindAll method, which in this case would return all items in the list that contain the search term:
var resultList = list.FindAll(delegate(string s) { return s.Contains(srch); });
To return all th entries:
IEnumerable<string> result = list.Where(s => s.Contains(search));
Only the first one:
string result = list.FirstOrDefault(s => s.Contains(search));
What you've written causes the compile error
The best overloaded method match for 'string.Substring(int)' has some invalid arguments
Substring is used to get part of string using character position and/or length of the resultant string.
for example
srch.Substring(1, 3) returns the string "her"
As other have mentioned you should use Contains which tells you if one string occurs within another. If you wanted to know the actual position you'd use IndexOf
same problem i had to do.
You need this:
myList.Where(listStrinEntry => myString.IndexOf(listStringEntry) != -1)
Where:
myList is List<String> has the values
that myString has to contain at any position
So de facto you search if myString contains any of the entries from the list.
Hope this is what you wanted...
i like to use indexOf or contains
someString.IndexOf("this");
someString.Contains("this");
And for CaseSensitive use:
YourObj yourobj = list.FirstOrDefault(obj => obj.SomeString.ToLower().Contains("some substring"));
OR
YourObj yourobj = list.FirstOrDefault(obj => obj.SomeString.ToUpper().Contains("some substring"));
i have a list of string
Emails = new List<string>() { "R.Dun#domain.co.nz", "S.Dun#domain.co.nz" }
now i want to pass string.empty to first value of list
something like
policy.Emails = new List<string>(){string.Empty};
how to put a loop for e.g. for each value of list do something.
you can directly set the first element as string.Empty:
policy.Emails[0]=string.Empty;
You can use indexof function for finding a string in the list as below,
List<string> strList = new List<string>() { "R.Dun#domain.co.nz", "S.Dun#domain.co.nz" };
int fIndex = strList.IndexOf("R.Dun#domain.co.nz");
if(fIndex != -1)
strList[fIndex] = string.Empty;
Or if you want to replace first item with string.Empty then as dasblinkenlight mentioned you can do using the index directly,
strList[0] = string.Empty
Hope it helps.
You can prepend string.Empty to an existing list with concat:
var emails = new List<string> {"R.Dun#domain.co.nz", "S.Dun#domain.co.nz"};
policy.Emails = new[] {string.Empty}.Concat(emails).ToList();
Now policy.Emails looks like this:
{"", "R.Dun#domain.co.nz", "S.Dun#domain.co.nz"}
If you would like to replace the first item, use Skip(1) before concatenating:
policy.Emails = new[] {string.Empty}.Concat(emails.Skip(1)).ToList();
To generalize, replacing the initial n values with empty strings would look like this:
policy.Emails = Enumerable.Repeat(string.Empty, 1).Concat(emails.Skip(n)).ToList();
Note: It goes without saying that if you do not mind modifying the list in place, the simplest solution is to do
emails[0] = string.Empty;
If you want to add an empty string at the beginning of a list you could do:
emails.Insert(0, string.Empty);
I have a list of strings in a List container class that look like the following:
MainMenuItem|MenuItem|subItemX
..
..
..
..
MainMenuItem|MenuItem|subItem99
What I am trying to do is transform the string, using LINQ, so that the first item for each of the tokenised string is removed.
This is the code I already have:
protected static List<string> _menuItems = GetMenuItemsFromXMLFile();
_menuItems.Where(x => x.Contains(menuItemToSearch)).ToList();
First line of code is returning an entire XML file with all the menu items that exist within an application in a tokenised form;
The second line is saying 'get me all menu items that belong to menuItemToSearch'.
menuItemToSearch is contained in the delimited string that is returned. How do I remove it using linq?
EXAMPLE
Before transform: MainMenuItem|MenuItem|subItem99
After transform : MenuItem|subItem99
Hope the example illustrates my intentions
Thanks
You can take a substring from the first position of the pipe symbol '|' to remove the first item from a string, like this:
var str = "MainMenuItem|MenuItem|subItemX";
var dropFirst = str.Substring(str.IndexOf('|')+1);
Demo.
Apply this to all strings from the list in a LINQ Select to produce the desired result:
var res = _menuItems
.Where(x => x.Contains(menuItemToSearch))
.Select(str => str.Substring(str.IndexOf('|')+1))
.ToList();
Maybe sth like this can help you.
var regex = new Regex("[^\\|]+\\|(.+)");
var list = new List<string>(new string[] { "MainMenuItem|MenuItem|subItem99", "MainMenuItem|MenuItem|subItem99" });
var result = list.Where(p => regex.IsMatch(p)).Select(p => regex.Match(p).Groups[1]).ToList();
This should work correctly.
I have a list like so and I want to be able to search within this list for a substring coming from another string. Example:
List<string> list = new List<string>();
string srch = "There";
list.Add("1234 - Hello");
list.Add("4234 - There");
list.Add("2342 - World");
I want to search for "There" within my list and return "4234 - There". I've tried:
var mySearch = list.FindAll(S => s.substring(srch));
foreach(var temp in mySearch)
{
string result = temp;
}
With Linq, just retrieving the first result:
string result = list.FirstOrDefault(s => s.Contains(srch));
To do this w/o Linq (e.g. for earlier .NET version such as .NET 2.0) you can use List<T>'s FindAll method, which in this case would return all items in the list that contain the search term:
var resultList = list.FindAll(delegate(string s) { return s.Contains(srch); });
To return all th entries:
IEnumerable<string> result = list.Where(s => s.Contains(search));
Only the first one:
string result = list.FirstOrDefault(s => s.Contains(search));
What you've written causes the compile error
The best overloaded method match for 'string.Substring(int)' has some invalid arguments
Substring is used to get part of string using character position and/or length of the resultant string.
for example
srch.Substring(1, 3) returns the string "her"
As other have mentioned you should use Contains which tells you if one string occurs within another. If you wanted to know the actual position you'd use IndexOf
same problem i had to do.
You need this:
myList.Where(listStrinEntry => myString.IndexOf(listStringEntry) != -1)
Where:
myList is List<String> has the values
that myString has to contain at any position
So de facto you search if myString contains any of the entries from the list.
Hope this is what you wanted...
i like to use indexOf or contains
someString.IndexOf("this");
someString.Contains("this");
And for CaseSensitive use:
YourObj yourobj = list.FirstOrDefault(obj => obj.SomeString.ToLower().Contains("some substring"));
OR
YourObj yourobj = list.FirstOrDefault(obj => obj.SomeString.ToUpper().Contains("some substring"));