I have a string with 3 names(example: string name="Hunter Georgie Martin"). I have 3 tasks for that string:
remove the first name
remove the second name
remove the third name
They don't depend on each other, meaning when deleting first name for the first task it shouldn't also be removed when doing the other tasks.
I completed the first task:
string name = "Hunter Gregorie Martin";//example
string str = name.Substring(name.IndexOf(' ')+1);
Console.WriteLine(str);
The output is what it should be: Gregorie Martin
The problem is that I can't think of a way to finish the other tasks in a similar way.
This simple function can be used for all three of your examples by utilizing System.Linq.
public string RemoveNameIndexFromString(string name, int indexToRemove, char separator = ' ')
{
// Split the original string by the separator character
string[] names = name.Split(separator);
// Check if the index to remove is valid
if (indexToRemove < 0 || indexToRemove >= names.Length)
return "Invalid index";
// Create a new array with the name at the specified index removed
var newNames = names.Where((val, idx) => idx != indexToRemove).ToArray();
// Join the remaining names back together using the separator character
return string.Join(separator.ToString(), newNames);
}
Usage
Console.WriteLine(RemoveNameIndexFromString("Hunter Gregorie Martin", 0));
Console.WriteLine(RemoveNameIndexFromString("Hunter Gregorie Martin", 1));
Console.WriteLine(RemoveNameIndexFromString("Hunter Gregorie Martin", 2));
Output
Gregorie Martin
Hunter Martin
Hunter Gregorie
Very similar to what GrumpyCrouton (great name!) did, but with a List instead:
public string RemoveNameIndexFromString(string name, int indexToRemove)
{
List<String> names = new List<String>(name.Split(' '));
if (indexToRemove >=0 && indexToRemove < names.Count) {
names.RemoveAt(indexToRemove);
}
return String.Join(" ", names);
}
Riff on GrumpyCrouton's answer using Take and Skip (taking all items before desired index and concatenating with items after the index) instead of Where (which skips the item). Also packing everything into single statements using IIFE as many people are concerned about number of statements (vs. readability)
string RemoveNameIndexFromString(string v, int idx) =>
((Func<string[], string>)(r =>
String.Join(" ",r.Take(idx).Concat(r.Skip(idx+1)))))(v.Split());
Less crazy version without IIFE would need to split twice but more readable:
string RemoveNameIndexFromString(string v, int idx) =>
String.Join(" ",v.Split().Take(idx).Concat(v.Split().Skip(idx+1)));
Assuming that you do not want not use fancy C# features and functions, you can do it with Substring and IndexOf alone by applying IndexOf again to the middle name + last name string.
string name = "Hunter Gregorie Martin";
Console.WriteLine("Name = " + name);
int index = name.IndexOf(' ');
string firstName = name.Substring(0, index);
string middleAndLastName = name.Substring(index + 1);
index = middleAndLastName.IndexOf(' ');
string middleName = middleAndLastName.Substring(0, index);
string lastName = middleAndLastName.Substring(index + 1);
Console.WriteLine("First name removed = " + middleAndLastName);
Console.WriteLine("Middle name removed = " + firstName + " " + lastName);
Console.WriteLine("Last name removed = " + firstName + " " + middleName);
prints
Name = Hunter Gregorie Martin
First name removed = Gregorie Martin
Middle name removed = Hunter Martin
Last name removed = Hunter Gregorie
Just be creative!
Related
I have a string as below
"/calc 2 3 +"
how to split in such a way that i can get
str1="/calc"
str2= "2 3 +"
is there any method in c# does special character splitting?
Thanks!
If it's just that string and always split like you have it, then you can do this:
var x = #"/calc 2 3 +";
var str1 = x.Substring(0, 5);
var str2 = x.Substring(6);
Otherwise, no, there's not special thing that does it because you don't have a unique delimiter.
Use IndexOf method to find the first occurrence of space character. And then use Substring method to split the string into 2.
string strInput = #"/calc 2 3 +";
var list = strInput.Split(' ').ToList();
str1 = list[0];
str2 = String.Join(" ",list.RemoveAt(0));
I'm surprised that no one provided the most obvious answer - using one of the string.Split overloads that allows you to specify the maximum number of substrings to return:
string input = "/calc 2 3 +";
var result = input.Split(new[] { ' ' }, 2);
Debug.Assert(result.Length == 2 && result[0] == "/calc" && result[1] == "2 3 +");
There are lots of ways to do that. The easiest one is to use index of the first space.
var mystr = #"/calc 2 3 +";
int index= mystr.IndexOf(' ');
var str1 = mystr.Substring(0, index);
var str2 = mystr.Substring(index+1);
Also if there is any pattern in your text, you can also use RegEx
string a = "/calc 2 3 +";
string[] array = a.Split(' ');
str1= array[0];
str2= string.Format("{0} {1} {2}", array[1], array[2], array[3]);
I am looking for how to get rid off below exception "Index was outside the bounds of the array." for the below case 2
Aim: To separate the first name and last name (last name may be null some times)
Case 1:
Name: John Melwick
I can be able to resolve the first case with my code
Case 2:
Name: Kennedy
In case two I am getting an error Index was out of range at LastName in my code
Case 3:
Name: Rudolph Nick Bother
In case 3, I can be able to get:
FirstName: Rudolph and LastName: Nick (whereas I need Nick Bother together to be lastname)
Very much thankful, if anybody help me.
Here is the code:
Match Names = Regex.Match(item[2], #"(((?<=Name:(\s)))(.{0,60})|((?<=Name:))(.{0,60}))", RegexOptions.IgnoreCase);
if (Names.Success)
{
FirstName = Names.ToString().Trim().Split(' ')[0];
LastName = Names.ToString().Trim().Split(' ')[1];
}
Split the string with a limit on the number of substrings to return. This will keep anything after the first space together as the last name:
string[] names = Names.ToString().Trim().Split(new char[]{' '}, 2);
Then check the length of the array to handle the case of only the lastname:
if (names.Length == 1) {
FirstName = "";
LastName = names[0];
} else {
FirstName = names[0];
LastName = names[1];
}
Use
String.indexof(" ")
And
string.lastindexof(" ")
if they match there is one space. If they dont there is 2. I believe it returns 0 if there are no matches. Hope this helps
edit
if you use the indexes you can do a substring using them and get the last name as you are wanting
Something like this works:
string name = "Mary Kay Jones" ;
Regex rxName = new Regex( #"^\s*(?<givenName>[^\s]*)(\s+(?<surname>.*))?\s*$") ;
Match m = rxName.Match( name ) ;
string givenName = m.Success ? m.Groups[ "givenName" ].Value : "" ;
string surname = m.Success ? m.Groups[ "surname" ].Value : "" ;
But it is an extremely erroneous assumption that a given name consists only of a single word. I can think of many examples to the contrary, such as (but by no means limited to):
Billy Ray (as in the earlier example of "Billy Ray Cyrus")
Mary Kay
Mary Beth
And there's no real way to know without asking the person in question. Does "Mary Beth Jones" consist a given, middle and surname or does consist of a given name, Mary Beth and a surnname "Jones".
If you are considering English-speaking cultures, the usual convention is that one may have as many given names (forenames) followed by a family name (surname). Prince Charles, heir to the British Crown, for instance carries the rather heavy-duty Charles Phillip Arthur George Mountbatten-Windsor. Strictly speaking, he has no surname. Mountbatten-Windsor is used when one is required and his full name is just "Charles Phillip Arthur George".
string fullName = "John Doe";
var names = fullName.Split(' ');
string firstName = names[0];
string lastName = names[1];
The reason you're getting an error is because you're not checking for the length of names.
names.Length == 0 //will not happen, even for empty string
names.Length == 1 //only first name provided (or blank)
names.Length == 2 //first and last names provided
names.Length > 2 //first item is the first name. last item is the last name. Everything else are middle names
See this answer for more information.
Modify the code to be something like:
Match Names = Regex.Match(item[2], #"(((?<=Name:(\s)))(.{0,60})|((?<=Name:))(.{0,60}))", RegexOptions.IgnoreCase);
if (Names.Success)
{
String[] nameParts = Names.ToString().Trim().Split(' ');
int count = 0;
foreach (String part in nameParts) {
if(count == 0) {
FirstName = part;
count++;
} else {
LastName += part + " ";
}
}
}
Here is the most generalized solution for this issue.
public class NameWrapper
{
public string FirstName { get; set; }
public string LastName { get; set; }
public NameWrapper()
{
this.FirstName = "";
this.LastName = "";
}
}
public static NameWrapper SplitName(string inputStr, char splitChar)
{
NameWrapper w = new NameWrapper();
string[] strArray = inputStr.Trim().Split(splitChar);
if (string.IsNullOrEmpty(inputStr)){
return w;
}
for (int i = 0; i < strArray.Length; i++)
{
if (i == 0)
{
w.FirstName = strArray[i];
}
else
{
w.LastName += strArray[i] + " ";
}
}
w.LastName = w.LastName.Trim();
return w;
}
Object Book has Author which has property Name of type string.
I want to iterate trough all Authors and add it's Name string to the one string (not array) separated by comma, so this string should be at the as
string authorNames = "Author One, Author two, Author three";
string authorNames = string.Empty;
foreach(string item in book.Authors)
{
string fetch = item.Name;
??
}
You can use the string.Join function with LINQ
string authorNames = string.Join(", ", book.Authors.Select(a => a.Name));
You can use
string authors = String.Join(", ", book.Authors.Select(a => a.Name));
LINQ is the way to go in C#, but for explanatory purposes here is how you could code it explicitly:
string authorNames = string.Empty;
for(int i = 0; i < book.Authors.Count(); i++)
{
if(i > 0)
authorNames += ", ";
authorNames += book.Authors[i].Name;
}
You could also loop through them all, and append them to authorNames and add a comma in the end, and when it's done simply trim of the last comma.
string authorNames = string.Empty;
foreach(string author in book.Authors)
{
string authorNames += author.Name + ", ";
}
authorNames.TrimEnd(',');
Using LinQ, there are plenty of ways to merge multiple string into one string.
book.Authors.Select(x => x.Name).Aggregate((x, y) => x + ", " + y);
To anwsers James' comment
[TestMethod]
public void JoinStringsViaAggregate()
{
var mystrings = new[] {"Alpha", "Beta", "Gamma"};
var result = mystrings.Aggregate((x, y) => x + ", " + y);
Assert.AreEqual("Alpha, Beta, Gamma", result);
}
I want to output a string that welcomes a user to the application. I have the user's first, middle and last name. I would like to write the user's full name, i.e. "Hello {0} {1} {2}" with first, middle and last being the parameters. However, If the middle name is empty, I don't want two spaces between the first and the last name, but rather only one space. I can obviously do it with an "if", but is there a more elegant way to achieve this?
Thanks
string.Format("{0} {1} {2}", first, middle, last).Replace(" "," ")
It might be worthwhile to make a Name class that has a Full property that takes care of that logic (i.e. will print "John Smith" if there is no middle name or "John A. Smith" if there is).
Then your code would be:
var name = new Name(first, middle, last);
var message = string.Format("Hello {0}", name.Full);
You could also consider adding LastFirstMiddle property (to get a "Smith, John A." formatted string) and any other properties that would make sense with the Name class.
"Hello {0} {1}{3}{2}"
where
{3} = param1.IsNullOrEmpty() ? "" : " "
One way to achieve this would be to put the space into the parameter string. For example (only first and last name as an example)
Console.WriteLine("Hello {0}{1}{2}",
firstName,
String.IsNullOrEmpty(firstName) ? String.Empty : " ",
lastName);
var hello =
(from name in new[] { "Hello", firstName, middleName, lastName }
where !string.IsNullOrEmpty(name))
.Aggregate((xs, x) => xs + " " + x);
or
var hello = string.Join(" ",
(from name in new[] { "Hello", firstName, middleName, lastName }
where !string.IsNullOrEmpty(name))
.ToArray());
I have used this method in my projects. and it helps alot.
public string LogicFullName(string fName)
{
string logicName = String.Empty;
string[] splitFullName = fName.Trim().Split(' ');
for (int i = 0; i < splitFullName.Length; i++)
{
if (logicName == String.Empty && i == 0)
{
logicName = splitFullName[i].Trim();
}
else
{
if (splitFullName[i] != String.Empty)
logicName = logicName + " " + splitFullName[i].Trim();
}
}
return logicName;
}
Ok i have a string where i want to remove the last word split by \
for example:
string name ="kak\kdk\dd\ddew\cxz\"
now i want to remove the last word so that i get a new value for name as
name= "kak\kdk\dd\ddew\"
is there an easy way to do this
thanks
How do you get this string in the first place? I assume you know that '' is the escape character in C#. However, you should get far by using
name = name.TrimEnd('\\').Remove(name.LastIndexOf('\\') + 1);
string result = string.Join("\\",
"kak\\kdk\\dd\\ddew\\cxz\\"
.Split(new[] { '\\' }, StringSplitOptions.RemoveEmptyEntries)
.Reverse()
.Skip(1)
.Reverse()
.ToArray()) + "\\";
Here's a non-regex manner of doing it.
string newstring = name.SubString(0, name.SubString(0, name.length - 1).LastIndexOf('\\'));
This regex replacement should do the trick:
name = Regex.Replace(name, #"\\[a-z]*\\$", "\\");
Try this:
const string separator = "\\";
string name = #"kak\kdk\dd\ddew\cxz\";
string[] names = name.Split(separator.ToCharArray(),
StringSplitOptions.RemoveEmptyEntries);
string result = String.Join(separator, names, 0, names.Length - 1) + separator;
EDIT:I just noticed that name.Substring(0,x) is equivalent to name.Remove(x), so I've changed my answer to reflect that.
In a single line:
name = name = name.Remove(name.Remove(name.Length - 1).LastIndexOf('\\') + 1);
If you want to understand it, here's how it might be written out (overly) verbosely:
string nameWithoutLastSlash = name.Remove(name.Length - 1);
int positionOfNewLastSlash = nameWithoutLastSlash.LastIndexOf('\\') + 1;
string desiredSubstringOfName = name.Remove(positionOfNewLastSlash);
name = desiredSubstringOfName;
My Solution
public static string RemoveLastWords(this string input, int numberOfLastWordsToBeRemoved, char delimitter)
{
string[] words = input.Split(new[] { delimitter });
words = words.Reverse().ToArray();
words = words.Skip(numberOfLastWordsToBeRemoved).ToArray();
words = words.Reverse().ToArray();
string output = String.Join(delimitter.ToString(), words);
return output;
}
Function call
RemoveLastWords("kak\kdk\dd\ddew\cxz\", 1, '\')
string name ="kak\kdk\dd\ddew\cxz\"
string newstr = name.TrimEnd(#"\")
if you working with paths:
string name = #"kak\kdk\dd\ddew\cxz\";
Path.GetDirectoryName(name.TrimEnd('\\'));
//ouput: kak\kdk\dd\ddew
string[] temp = name.Split('\\');
string last = "\\" + temp.Last();
string target = name.Replace(last, "");
For Linq-lovers: With later C# versions you can use SkipLast together with Split and string.Join:
var input = #"kak\kdk\dd\ddew\cxz\";
string result = string.Join( #"\", input
.Split( #"\", StringSplitOptions.RemoveEmptyEntries )
.SkipLast( 1 ))
+ #"\";