Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
Questions asking for code must demonstrate a minimal understanding of the problem being solved. Include attempted solutions, why they didn't work, and the expected results. See also: Stack Overflow question checklist
Closed 9 years ago.
Improve this question
I want to build a searching function with keywords format on Entity Framework.
void funcSearch(string keywork)
{
if (keywork == "[tag]")
{
//regex for is tag
//do search tag
}
if (keywork == "user:1234")
{
//regex for userid is 1234
//do search user with 1234
}
...
}
Can i use regex to parse a query string format like SO, or any method? a function to to be able to analyze all of the cases with corresponding keyword?
tags [tag]
exact "words here"
author user:1234
user:me (yours)
score score:3 (3+)
score:0 (none)
answers answers:3 (3+)
answers:0 (none)
isaccepted:yes
hasaccepted:no
inquestion:1234
views views:250
sections title:apples
body:"apples oranges"
url url:"*.example.com"
favorites infavorites:mine
infavorites:1234
status closed:yes
duplicate:no
migrated:no
wiki:no
types is:question
is:answer
thank you for advice.
Yes, you can. You'd have to create a list of regular expressions to check and loop through them until you find a match. (Make sure to prioritize them correctly.)
For example, to find out if a search query is querying tags, you can use the following regex:
string query = "[tag]";
bool isTag = Regex.IsMatch(query, #"^\[.+?\]$");
Here's another regex matching a user ID:
string query = "user:1234";
var match = Regex.Match(query, #"^user:(\d+)$", RegexOptions.IgnoreCase);
Note that you should trim your query first.
Related
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
Questions asking for code must demonstrate a minimal understanding of the problem being solved. Include attempted solutions, why they didn't work, and the expected results. See also: Stack Overflow question checklist
Closed 9 years ago.
Improve this question
I want regx pattern in C# which find substring in any string which comes in middle only. Let say ,
Input : "toprohitpop rohittoppop toppoprohit"
find substring : "rohit"
Replace with : "$$$$"
Output : "top$$$$pop rohittoppop toppoprohit"
if substring "rohit" comes in left or right of the string then it should not be replaced.Substring "rohit" will only be replaced when it comes in middle of string .
Thanks in advance.
Use non-word-break anchors:
\Brohit\B
The \B will only match if it is in the middle of a word.
Read about it.
var input = "toprohitpop rohittoppop toppoprohit";
var regex = new Regex(#"\Brohit\B");
var output = regex.Replace(input, "$$$$$$$$");
See "Anchors" in Regular Expression Language.
Also, be careful with the '$' in the substitution string (see comments)
Use the following regex: .+rohit.+
Basically it enforeces at least one char before rohit and one after
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
Questions asking for code must demonstrate a minimal understanding of the problem being solved. Include attempted solutions, why they didn't work, and the expected results. See also: Stack Overflow question checklist
Closed 9 years ago.
Improve this question
I am trying to create a RegEx and C# pattern that will match a phrase like:
Photos of Washington DC taken by Jane Doe
Where the capture groups result in "Photos" "Washington DC" and "Jane Doe". Other possibilities would be:
Videos of Austin taken by Ruby : Videos, Austin, Ruby
Photos of Red Bud Dogs taken by Willa Shepherd :Photos, Red Bud Dogs, Willa Shepherd
Is this even possible with RegEx?
It appears that I got flagged...did I mention that I don't know RegEx?
I tried: (Photo of).*?((?:[a-z][a-z]+))(Taken by)((?:[a-z][a-z]+)) but that failed.
.* matches any string (except newlines). By adding a ? to it (.*?), you can tell the regex engine to match as few characters as possible, which is probably the right approach here, so the very first instances of of and taken by will be used as separators of your intended sub-matches:
matchResults = Regex.Match(subjectString, "^(.*?) of (.*?) taken by (.*)");
// matchResults.Groups[1].Value contains "Photos" etc.
If you don't expect more than one of and taken by in your input, you can change all .*? into .*.
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
Questions asking for code must demonstrate a minimal understanding of the problem being solved. Include attempted solutions, why they didn't work, and the expected results. See also: Stack Overflow question checklist
Closed 9 years ago.
Improve this question
I want to trim a string and remove all the words that occur after a certain word.
For example - If the string contains 'very' text
string mySentence=" Today is very nice day! ";
if (mysentence.Contains(very))
{
//remove everything that starts with 'very' until rest of the line..
}
result should be:
Today is
First you split using the required word
string[] splits = mysentence.Split("very");
Since you've already made certain that "very" is inside the string, this will get you two strings. You want the first one (the split before the "very"). You need to trim the extra space from that one so:
string result = splits[0].Trim();
Try this
string mySentence = " Today is very nice day! ";
if (mySentence.Contains("very"))
{
mySentence = mySentence.Remove(mySentence.IndexOf("very")).Trim();
}
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
Questions asking for code must demonstrate a minimal understanding of the problem being solved. Include attempted solutions, why they didn't work, and the expected results. See also: Stack Overflow question checklist
Closed 9 years ago.
Improve this question
How do I find a substring up to a specific character? What I would like is to find the substring of something similar to:
172.20.9.93\randDir
I want the IPAddress, or in other terms, everything up until the "\" if the "\" exists.
Is there a way to do this with substring or is there a better way to do this?
I want the IPAddress, or in other terms, everything up until the "\" if the "\" exists.
Two options:
Find the index of the first \ using IndexOf, then use Substring
int firstSlash = text.IndexOf('\\');
string ipAddress = firstSlash == -1 ? text : text.Substring(0, firstSlash);
Split by \ using String.Split, and then take the first part
string ipAddress = text.Split('\\')[0];
Try using a regular expression match:
var input = #"172.20.9.93\rand";
var output = Regex.Match(input, #"\b(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\b");
Console.WriteLine(output.Value);
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
Questions asking for code must demonstrate a minimal understanding of the problem being solved. Include attempted solutions, why they didn't work, and the expected results. See also: Stack Overflow question checklist
Closed 9 years ago.
Improve this question
I have a html file, with unknown ammount of tokens. The keywords will be assigned to some data later by the user. I want to determine how much token does the html contain.
Tokens can look like : ¤SomeID¤ or ¤Name¤ or even ¤SomeLongerWord¤.
Can somebody give me a complete code with regex, that would collect the tokens into a list from a string?
Example:
string ExtractFromThis = "Hello ¤Name¤, do you speak ¤SomeLanguage¤?"
List<string> IldLikeToHave = Magic(ExtractFromThis);
//IldLikeToHave should contain {"¤Name¤", "¤SomeLanguage¤"}
Thank you!
You could use a simple regular expression such as ¤.*?¤ (notice the non-greedy star) matching anything enclosed in ¤. Here's a sample. You could use Regex.Matches() to get all the matches.
If you're interested in getting the text inside the delimiters, you could as well put the quantifier inside a capture group like this ¤(.*?)¤, and use Match.Groups() to get the capture groups of every match.
I don't do C#, but here's a sample of what it should probably look like:
string pattern = #"¤(.*?)¤";
string input = "Hello ¤Name¤, do you speak ¤SomeLanguage¤?";
MatchCollection matches = Regex.Matches(input, pattern);
List<string> l = new List<string>();
foreach (Match match in matches) {
l.add(match.Groups[1].Value);
}