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C# split string but keep split chars / separators [duplicate]
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Is there a clever way to do the following string manipulation in C#?
I have any kind of string and im looking for a specified delimiter. The code should divide the string in words before and after delimiter and also include the delimiter. The delimiter could be several times in a row and also could be in the start or the end.
// PSEUDO CODE
string = "Hello****wide****world";
delimiter = "****";
// result should be a list<string> like
{"Hello","****","wide","****","world"}
You can try to use Regex and the pattern is (\*{4}).
string data = "Hello****wide****world";
string[] words = Regex.Split(data, #"(\*{4})");
List<string> result = words.ToList();
NOTE
* is a keyword in regex string, so you need to use \ to escape it.
c# online
i'll say split the string with the delimiter, then when creating the result add the delimiter after each item in the array.
string fullWord = "Hello****wide****world";
string delimiter = "****";
var listOfWords = fullWord.Split(delimiter);
List<string> result = new List<string>();
foreach(var item in listOfWords){
result.Add(item);
result.Add(delimiter);
}
return result;
You can do it like this. In the end, you can iterate over the result.
string input = "Hello****wide****world";
string delimiter = "****";
var listOfWords = input.Split(new string[] { delimiter }, StringSplitOptions.None);
List<string> result = new List<string>();
foreach (var item in listOfWords)
{
if (!item.Equals(listOfWords.Last()))
{
result.Add(item);
result.Add(delimiter);
}
else
{
result.Add(item);
}
}
untested
string[] words = Regex.Split(originalString, #"(?=****)");
List<string> wordsLst = words.ToList();
User Regex to do it :
string input = "Hello****wide****world";
string pattern = "(****)";
string[] substrings = Regex.Split(input, pattern);
string fullWord = "Hello****wide****world";
string delimiter = "****";
var listOfWords = fullWord.Split(delimiter);
StringBuilder result = new StringBuilder("");
result.Append("{");
foreach(var item in listOfWords){
if (!item.Equals(listOfWords.Last()))
{
result.Append($"\"{item}\",\"{delimiter}\",");
}
else
{
result.Append($"\"{item}\"");
}
}
result.Append("}");
var stringResult=result.ToString();
Related
My Question consists of how might i split a string like this:
""List of devices attached\r\n9887bc314\tdevice\r\n12n1n2nj1jn2
\tdevice\r\n\r\n"
Into:
[n9887bc314,n12n1n2nj1jn2]
I have tried this but it throws the error "Argument 1: cannot convert from 'string' to 'char'"
string[] delimiterChars = new string[] {"\\","r","n","tdevice"};
string y = output.Substring(z+1);
string[] words;
words = y.Split(delimiterChars, StringSplitOptions.None);
I'm wondering if i'm doing something wrong because i'm quite new at c#.
Thanks A Lot
First of all String.Split accept strings[] as delimiters
Here is my code, hope it will helps:
string input = "List of devices attached\r\n9887bc314\tdevice\r\n12n1n2nj1jn2\tdevice\r\n\r\n";
string[] delimiterChars = {
"\r\n",
"\tdevice",
"List of devices attached"
};
var words = input.Split(delimiterChars, StringSplitOptions.RemoveEmptyEntries);
foreach (var word in words)
{
Console.WriteLine(word);
}
Split the whole string by the word device and then remove the tabs and new lines from them. Here is how:
var wholeString = "List of devices attached\r\n9887bc314\tdevice\r\n12n1n2nj1jn2\tdevice\r\n\r\n";
var splits = wholeString.Split(new[] { "device" }, StringSplitOptions.RemoveEmptyEntries);
var device1 = splits[1].Substring(splits[1].IndexOf("\n") + 1).Replace("\t", "");
var device2 = splits[2].Substring(splits[2].IndexOf("\n") + 1).Replace("\t", "");
I've been doing a first aproach and it works, it might help:
I splited the input looking for "/tdevice" and then cleaned everyting before /r/n including the /r/n itself. It did the job and should work with your adb output.
EDIT:
I've refactored my answer to consider #LANimal answer (split using all delimiters) and I tried this code and works. (note the # usage)
static void Main(string[] args)
{
var inputString = #"List of devices attached\r\n9887bc314\tdevice\r\n12n1n2nj1jn2\tdevice\r\n\r\n";
string[] delimiters = {
#"\r\n",
#"\tdevice",
#"List of devices attached"
};
var chunks = inputString.Split(delimiters, StringSplitOptions.RemoveEmptyEntries);
string result = "[";
for (int i = 0; i < chunks.Length; i++)
{
result += chunks[i] + ",";
}
result = result.Remove(result.Length - 1);
result += "]";
Console.WriteLine(result);
Console.ReadLine();
}
I hope it helps,
Juan
You could do:
string str = #"List of devices attached\r\n9887bc314\tdevice\r\n12n1n2nj1jn2\tdevice\r\n\r\n";
string[] lines = str.Split(new[] { #"\r\n" }, StringSplitOptions.None);
string firstDevice = lines[1].Replace(#"\tdevice", "");
string secondDevice = lines[2].Replace(#"\tdevice", "");
I have a string variable like:
string data= "#FirstName=Arvind #LastName= Chaudhary_009"
Using Regex in C# i Want the output like :
FirstName = Arvind;
LastName= Chaudhary009;
There would be more ways of doing this. Two of them would be
string data = "#FirstName=Arvind #LastName= Chaudhary_009";
data = data.Replace("_", "");
data = data.Replace("=", " = ");
string[] dt = data.Split(new char[] {'#'}, StringSplitOptions.RemoveEmptyEntries);
Console.WriteLine(dt[0]); // Print your array here
Regex: Which you asked for
Regex regex = new Regex(#"#");
string[] dt1 = regex.Split(data).Where(s => s != String.Empty).ToArray();
Console.WriteLine(dt1[0]); // Print your array here
You can print array the way you want
Edit
After Understanding the requirements from comments
string data = "#FirstName=Arvind #LastName= Chaudhary_009";
data = data.Replace("_", "");
string[] dt = data.Split(new char[] {'#'}, StringSplitOptions.RemoveEmptyEntries);
Regex regex = new Regex(#"#");
string[] dt1 = regex.Split(data).Where(s => s != String.Empty).ToArray();
foreach(string d in dt)
{
//this will print both the line
Console.WriteLine(d);
}
foreach(string d in dt1)
{
//this will print both the line
Console.WriteLine(d);
}
There will be many solutions. I suggest you use .NET Regex Tester or a similar online tool to help develop a regex that works well.
A simple example regex that will give you some groups:
#FirstName\s*=\s*(.*)\s?#LastName\s*=\s*(.*)_(.*)
Run that and then format up the output based on groups 1, 2, 3.
I need to read all of .txt file and save data to array/list. File looks like this:
row11 row12 row13
row21 row22 row23
row31 row32 row33
between strings are only spaces.
Next I will insert data from array/list<> to mysql, but it is not problem.
Thanks.
EDIT: I need insert 3 columns to mysql like .txt file.
Use String.Split(Char[], StringSplitOptions) where the first parameter specifies that you want to split your string using spaces and tabs, and the second parameter specifies that you ignore empty entries (for cases where there are multiple spaces between entries)
Use this code:
var lines = System.IO.File.ReadAllLines(#"D:\test.txt");
var data = new List<List<string>>();
foreach (var line in lines)
{
var split = line.Split(new[]{' ', '\t'}, StringSplitOptions.RemoveEmptyEntries);
data.Add(split.ToList());
}
You can use File.ReadLines() to read the lines from the file, and then Regex.Split() to split each line into multiple strings:
static IEnumerable<String> SplitLines(string path, string splitPattern)
{
foreach (string line in File.ReadAllLines(path))
foreach (string part in Regex.Split(line, splitPattern))
yield return part;
}
To split by white space, you can use the regex pattern \s+:
var individualStrings = SplitLines(#"C:\path\to\file.txt", #"\s+");
You can use the ToList() extension method to convert it to a list:
List<string> individualStrings = SplitLines(#"D:\test\rows.txt", #"\s+").ToList();
As long as there are never spaces in the "values", then a simple line-by line parser will work.
A simple example
var reader = new StreamReader(filePath);
var resultList = new List<List<string>>();
string line;
while ((line = reader.ReadLine()) != null)
{
var currentValues = new List<string>();
// You can also use a StringBuilder
string currentValue = String.Empty;
foreach (char c in line)
{
if (Char.IsWhiteSpace(c))
{
if (currentValue.Length > 0)
{
currentValues.Add(currentValue);
currentValue = String.Empty;
}
continue;
}
currentValue += c;
}
resultList.Add(currentValues);
}
Here's a nifty one-liner based off Amadeusz's answer:
var lines = File.ReadAllLines(fileName).Select(l => l.Split(new[] { ' ', '\t' }, StringSplitOptions.RemoveEmptyEntries)).SelectMany(words => words);
I am trying to get a list of words (below) to be put into an array. I want each word to be in it's own index.
Here is my code that I have so far.
string badWordsFilePath = openFileDialog2.FileName.ToString();
StreamReader sr = new StreamReader(badWordsFilePath);
string line = sr.ReadToEnd();
string[] badWordsLine = line.Split(' ');
int BadWordArrayCount = 0;
foreach (string word in badWordsLine)
{
badWords[BadWordArrayCount] = word;
BadWordArrayCount = BadWordArrayCount + 1;
}
int test = badWords.Length;
MessageBox.Show("Words have been imported!");
BadWordsImported = true;
Here is the list of words I want to import.
label
invoice
post
document
postal
calculations
copy
fedex
statement
financial
dhl
usps
8
notification
n
irs
ups
no
delivery
ticket
If someone could give me an example of how to get this to work, that would be a huge help.
Simplified code:
string badWordsFilePath = openFileDialog2.FileName.ToString();
string[] badWords = File.ReadAllLines(badWordsFilePath);
int test = badWords.Length;
MessageBox.Show("Words have been imported!");
BadWordsImported = true;
If every word starts on a new line then you do not need to create a for loop. The Split method will convert to an array for you.
string badWordsFilePath = openFileDialog2.FileName.ToString();
StreamReader sr = new StreamReader(badWordsFilePath);
string line = sr.ReadToEnd();
string[] badWords = line.Split('\n');
You are splitting on space, but there is a newline between each word. Split on newline instead:
string[] badWordsLine = line.Split(new string[]{ Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries);
Then you have to create the array to put the words in:
badWords = new string[badWordsLine.Length];
However, to loop through a string array just to copy the strings to a string array seems pointless. Just assing the string array to the variable. Also, you forgot to close the stream reader, which is best taken care of with a using block:
string badWordsFilePath = openFileDialog2.FileName.ToString();
string line;
using (StreamReader sr = new StreamReader(badWordsFilePath)) {}
line = sr.ReadToEnd();
}
badWords = line.Split(new string[]{ Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries);
int test = badWords.Length;
MessageBox.Show("Words have been imported!");
BadWordsImported = true;
Maybe try this modification? It allows on splitting on various white spaces.
string badWordsFilePath = openFileDialog2.FileName.ToString();
StreamReader sr = new StreamReader(badWordsFilePath);
string line = sr.ReadToEnd();
string[] badWordsLine = line.Split(new string[] {" ", "\t", "\r\n"}, StringSplitOptions.RemoveEmptyEntries);
int BadWordArrayCount = 0;
foreach (string word in badWordsLine)
{
badWords[BadWordArrayCount] = word;
BadWordArrayCount = BadWordArrayCount + 1;
}
int test = badWords.Length;
MessageBox.Show("Words have been imported!");
BadWordsImported = true;
Do you have to use a StreamReader? If you do not have to, then this code is clearer (in my opinion).
string text = File.ReadAllText(badWordsFilePath);
string[] words = Regex.Split(text, #"\s+");
If you're 100% certain that each word is on its own line and there are no empty lines, this might be overkill; and the File.ReadAllLines suggestion by #Ulugbek Umirov is simpler.
I want to split a string into an array. The string is as follows:
:hello:mr.zoghal:
I would like to split it as follows:
hello mr.zoghal
I tried ...
string[] split = string.Split(new Char[] {':'});
and now I want to have:
string something = hello ;
string something1 = mr.zoghal;
How can I accomplish this?
String myString = ":hello:mr.zoghal:";
string[] split = myString.Split(':');
string newString = string.Empty;
foreach(String s in split) {
newString += "something = " + s + "; ";
}
Your output would be:
something = hello; something = mr.zoghal;
For your original request:
string myString = ":hello:mr.zoghal:";
string[] split = myString.Split(new[] { ':' }, StringSplitOptions.RemoveEmptyEntries);
var somethings = split.Select(s => String.Format("something = {0};", s));
Console.WriteLine(String.Join("\n", somethings.ToArray()));
This will produce
something = hello;
something = mr.zoghal;
in accordance to your request.
Also, the line
string[] split = string.Split(new Char[] {':'});
is not legal C#. String.Split is an instance-level method whereas your current code is either trying to invoke Split on an instance named string (not legal as "string" is a reserved keyword) or is trying to invoke a static method named Split on the class String (there is no such method).
Edit: It isn't exactly clear what you are asking. But I think that this will give you what you want:
string myString = ":hello:mr.zoghal:";
string[] split = myString.Split(new[] { ':' }, StringSplitOptions.RemoveEmptyEntries);
string something = split[0];
string something1 = split[1];
Now you will have
something == "hello"
and
something1 == "mr.zoghal"
both evaluate as true. Is this what you are looking for?
It is much easier than that. There is already an option.
string mystring = ":hello:mr.zoghal:";
string[] split = mystring.Split(new char[] {':'}, StringSplitOptions.RemoveEmptyEntries);