I'm struggling with making a regex for this type of formula: LU1O/00054362/8. I'd like to receive only the first part - LU1O every time. It's always letter, letter, number, letter. Please help me with suggestion.
try this:
string input = #"LU1O/00054362/8";
var regex = "^[A-Z]{2}[0-9][A-Z]$";
var match = Regex.Match(input.Substring(0,4), regex, RegexOptions.IgnoreCase);
if (match.Success)
{
//matched
}
or
string input2 = #"LU1O/00054362/8";
var regex2= "^[A-Z]{2}[0-9][A-Z]";
var match2 = Regex2.Match(input2, regex2, RegexOptions.IgnoreCase);
if (match2.Success)
{
//matched
}
If '/' is always a delimiter you could string.split('/') and access the first element from the resulting array.
I need an solution for my problem. I have a clause like:
Hello guys I am cool (test)
An now I need an effective method to split just only the part in the parentheses and the result should be:
test
My try is to split the String in words like. But I don't think it is the best way.
string[] words = s.Split(' ');
I do not think that split is the solution to your problem
Regex is very good for extracting data.
using System.Text.RegularExpression;
...
string result = Regex.Match(s, #"\((.*?)\)").Groups[1].Value;
This should do the trick.
Assuming:
var input = "Hello guys I am cool (test)";
..Non-Regex version:
var nonRegex = input.Substring(input.IndexOf('(') + 1, input.LastIndexOf(')') - (input.IndexOf('(') + 1));
..Regex version:
var regex = Regex.Match(input, #"\((\w+)\)").Groups[1].Value;
You can use regex for this:
string parenthesized = Regex.Match(s, #"(?<=\()[^)]+(?=\))").Value;
Here's an explanation of the various parts of the regex pattern:
(?<=\(): Lookbehind for the ( (excluded from the match)
[^)]+: Sequence of characters consisting of anything except )
(?=\)): Lookahead for the ) (excluded from the match)
The most efficient way is using string methods but you don't need Split but Substring and IndexOf. Note that this currently just finds a single word in parentheses:
string text = "Hello guys I am cool (test)";
string result = "--no parentheses--";
int index = text.IndexOf('(');
if(index++ >= 0) // ++ used to look behind ( which is a single character
{
int endIndex = text.IndexOf(')', index);
if(endIndex >= 0)
{
result = text.Substring(index, endIndex - index);
}
}
string s = "Hello guys I am cool (test)";
var result = s.Substring(s.IndexOf("test"), 4);
I want to filter the following string with the regular expressions:
TEST^AB^^HOUSE-1234~STR2255
I wanna get only the string "HOUSE-1234" and I've to test the string always with the beginning "TEST^AB^^" and ending with the "~".
Can you please help me how the regex should look like?
You can use \^\^(.*?)\~ pattern which matches start with ^^ and ends with ~
string s = #"TEST^AB^^HOUSE-1234~STR2255";
Match match = Regex.Match(s, #"\^\^(.*?)\~", RegexOptions.IgnoreCase);
if (match.Success)
{
string key = match.Groups[1].Value;
Console.WriteLine(key);
}
Output will be;
HOUSE-1234
Here is a DEMO.
string input = "TEST^AB^^HOUSE-1234~STR2255";
var matches = Regex.Matches(input, #"TEST\^AB\^\^(.+?)~").Cast<Match>()
.Select(m => m.Groups[1].Value)
.ToList();
string pattern=#"\^\^(.*)\~";
Regex re=new Regex(pattern);
With the little information you've given us (and assuming that the TEST^AB isn't necessarily constant), this might work:
(?:\^\^).*(?:~)
See here
Or if TEST^AB is constant, you can throw it in too
(?:TEST\^AB\^\^).*(?:~)
The important part is to remember that you need to escape the ^
Don't even need the RegEx for something that well defined. If you want to simplify:
string[] splitString;
if (yourstring.StartsWith("TEST^AB^^"))
{
yourstring = yourstring.Remove(0, 9);
splitString = yourstring.Split('~');
return splitString[0];
}
return null;
(TEST\^AB\^\^)((\w)+-(\w+))(\~.+)
There are three groups :
(TEST\^AB\^\^) : match yours TEST^AB^^
((\w)+\-(\w+)) : match yours HOUSE-123
(\~.+) : match the rest
You should do this without regex:
var str = "TEST^AB^^HOUSE-1234~STR2255";
var result = (str.StartsWith("TEST^AB^^") && str.IndexOf('~') > -1)
? new string(str.Skip(9).TakeWhile(c=>c!='~').ToArray())
: null;
Console.WriteLine(result);
For Example, I have a string like :
string str = "santhosh,phani,ravi,phani123,praveen,sathish,prakash";
I want to delete the charaters ,phani from str.
Now, I am using str = str.Replace(",phani", string.Empty);
then my output is : str="santhosh,ravi123,praveen,sathish,prakash";
But I want a output like : str="santhosh,ravi,phani123,praveen,sathish,prakash";
string str = "santhosh,phani,ravi,phani123,praveen,sathish,prakash";
var words = str.Split(',');
str = String.Join(",", words.Where(word => word != "phani"));
the better choice is to use a Split and Join method.
Easy in Linq :
String str = "santhosh,phani,ravi,phani123,praveen,sathish,prakash";
String token = "phani";
String result = String.Join(",", str.Split(',').Where(s => s != token));
(edit : I take time for testing and i'm not first ^^)
String.join(",", str.split(',').ToList().remove("phani"));
Removes any given name from the list.
How about
str = str.Replace(",phani,", ",");
This, however, does not work if "phani" is the last item in the string. To get around this, you could do this:
string source = "...";
source += ","; // Explicitly add a comma to the end
source = source.Replace(",phani,", ",").TrimEnd(',');
This adds a comma, replaces "phani" and removes the trailing comma.
A third solution would be this:
str = String.Join(",", str.Split(',').ToList().Remove("phani").ToArray());
Try to use with comma instead of;
string str = "santhosh,ravi,phani,phani123,praveen,sathish,prakash";
str = str.Replace(",phani,", ",");
Console.WriteLine(str);
Output will be;
santhosh,ravi,phani123,praveen,sathish,prakash
Here is a DEMO.
As Davin mentioned in comment, this won't work if phani is last item in the string. Silvermind's answer looks like the right answer.
string str = "santhosh,phani,ravi,phani123,praveen,sathish,prakash";
string pattern = #"\b,phani,\b";
string replace = ",";
Console.WriteLine(Regex.Replace(str, pattern, replace));
Output:
santhosh,ravi,phani123,praveen,sathish,prakash
You may use the regular expression, but you have to take care of cases when your string starts or ends with the substring:
var pattern = #",?\bphani\b,?";
var regex = new Regex(pattern);
var result = regex.Replace(input, ",").Trim(',');
Shorter notation could look like this:
var result = Regex.Replace(input, #",?\bphani\b,?", ",").Trim(',');
Explanation of the regular expression: ,?\bphani\b,? matches the word phani, but only if preceded and followed by word-delimiter characters (because of the word boundary metacharacter \b), and it can be (but doesn't have to be) preceded and followed by the comma thanks to ,? which means none or more comma(s).
At the end we need to remove possible commas from the beginning and end of the string, that's why there's Trim(',') on the result.
Is there a regex pattern that can remove .zip.ytu from the string below?
werfds_tyer.abc.zip.ytu_20111223170226_20111222.20111222
Here is an answer using regex as the OP asked.
To use regex, put the replacment text in a match ( ) and then replace that match with nothing string.Empty:
string text = #"werfds_tyer.abc.zip.ytu_20111223170226_20111222.20111222";
string pattern = #"(\.zip\.ytu)";
Console.WriteLine( Regex.Replace(text, pattern, string.Empty ));
// Outputs
// werfds_tyer.abc_20111223170226_20111222.20111222
Just use String.Replace()
String.Replace(".zip.ytu", "");
You don't need regex for exact matches.
txt = txt.Replace(".zip.ytu", "");
Why don't you simply do above?
Don't really know what is the ".zip.ytu", but if you don't need exact matches, you might use something like that:
string txt = "werfds_tyer.abc.zip.ytu_20111223170226_20111222.20111222";
Regex mRegex = new Regex(#"^([^.]*\.[^.]*)\.[^.]*\.[^_]*(_.*)$");
Match mMatch = mRegex.Match(txt);
string new_txt = mRegex.Replace(txt, mMatch.Groups[1].ToString() + mMatch.Groups[2].ToString());
use string.Replace:
txt = txt.Replace(".zip.ytu", "");
Here is the method I use for more complex repaces. Check out the link: http://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex.replace(v=vs.110).aspx for a Regular Expression replace. I added the code below as well.
string input = "This is text with far too much " +
"whitespace.";
string pattern = "\\s+";
string replacement = " ";
Regex rgx = new Regex(pattern);
string result = rgx.Replace(input, replacement);
Console.WriteLine("Original String: {0}", input);
Console.WriteLine("Replacement String: {0}", result);