Develop Reference

How to add space two positions after each comma in string

I have a string like:
st = 0,090,000,170,16-0,030,19 0,330,19
How to add a spaces into it, two positions after each comma, to get string like:
st = 0,09 0,00 0,17 0,16 -0,03 0,19 0,33 0,19

Using Regex.Replace like below
var oldString = "0,090,000,170,16 - 0,030,19 0,330,19";
var newString = Regex.Replace(oldString, ",[0-9]{2}", (match) => { return match.Value + " "; });

How to separate sting with comma plus 8 digits

I want to split a long string (that contains only numbers) to string arr 0f numbers with 8 digits after the comma.
for example:
input:
string str = "45.00019821162.206580920.032150970.03215097244.0031982274.245303020.014716900.046867870.000198351974.613444580.391664580.438532450.00020199 3499.19734739 0.706802871.145335320.000202002543.362378010.513759201.659094520.000202102.391733720.000483371.65957789"
output:
string[] Arr=
"
45.00019821 162.20658092 234.03215097 123123.03215097
255.00019822 74.24530302 23422.01471690 1.04686787
12.00019835 1974.61344458 234.39166458 123212.43853245
532.00020199 3499.19734739 878.70680287 1.14533532
1234.00020200 2543.36237801 23.51375920 1.65909452
12221.00020210 2.39173372 0.00048337 1.65957789"
EDIT:
I try use
String.Format("{0:0.00000000}", str);
or some SubString such as:
public static string GetSubstring(string input, int count, char delimiter)
{
return string.Join(delimiter.ToString(), input.Split(delimiter).Take(count));
}
with no success.

You can split the string using Regex:
var strRegex = #"(?<num>\d+\.\d{8})";
var myRegex = new Regex(strRegex, RegexOptions.None);
foreach (Match myMatch in myRegex.Matches(str))
{
var part = myMatch.Groups["num"].Value;
// convert 'part' to double and store it wherever you want...
}
More compact version:
var myRegex = new Regex(#"(?<num>\d*\.\d{8})", RegexOptions.None);
var myNumbers = myRegex.Matches(str).Cast<Match>()
.Select(m => m.Groups["num"].Value)
.Select(v => Convert.ToDouble(v, CultureInfo.InvariantCulture));

The input string str can be converted to the desired output as follows.
static IEnumerable<string> NumberParts(string iString)
{
IEnumerable<char> iSeq = iString;
while (iSeq.Count() > 0)
{
var Result = new String(iSeq.TakeWhile(Char.IsDigit).ToArray());
iSeq = iSeq.SkipWhile(Char.IsDigit);
Result += new String(iSeq.Take(1).ToArray());
iSeq = iSeq.Skip(1);
Result += new String(iSeq.Take(8).ToArray());
iSeq = iSeq.Skip(8);
yield return Result;
}
}
The parsing method above can be called as follows.
var Parts = NumberParts(str).ToArray();
var Result = String.Join(" ", Parts);

This would be the classical for-loop version of it, (no magic involved):
// split by separator
string[] allparts = str.Split('.');
// Container for the resulting numbers
List<string> numbers = new List<string>();
// Handle the first number separately
string start = allparts[0];
string decimalPart ="";
for (int i = 1; i < allparts.Length; i++)
{
decimalPart = allparts[i].Substring(0, 8);
numbers.Add(start + "." + decimalPart);
// overwrite the start with the next number
start = allparts[i].Substring(8, allparts[i].Length - 8);
}
EDIT:
Here would be a LINQ Version yielding the same result:
// split by separator
string[] allparts = str.Split('.');
IEnumerable<string> allInteger = allparts.Select(x => x.Length > 8 ? x.Substring(8, x.Length - 8) : x);
IEnumerable<string> allDecimals = allparts.Skip(1).Select(x => x.Substring(0,8));
string [] allWholeNumbers = allInteger.Zip(allDecimals, (i, d) => i + "." + d).ToArray();

The shortest way without regex:
var splitted = ("00000000" + str.Replace(" ", "")).Split('.');
var result = splitted
.Zip(splitted.Skip(1), (f, s) =>
string.Concat(f.Skip(8).Concat(".").Concat(s.Take(8))))
.ToList()
Try it online!

Substring Specific Word Containing Special Character between them

I have following String
string test = "viv-ek is a good boy.Mah - esh is Cra - zy.";
I want to get {"Vivek","Mahesh","Crazy"} words from that string
Some having only "-" and some having " - " in between words.

You can find your words with following regex :
\b\w+(?:\s-\s|-)\w+\b
and replace the result of match strings with (?:\s-\s|-) with empty string ''.

\b\w+\s*-\s*\w+\b
You can try this.See demo.
https://regex101.com/r/cZ0sD2/14

This might do the trick for you
string test = "viv-ek is a good boy.Mah - esh is Cra - zy.";
test = test.Replace(" -", "-").Replace("- ", "-").Replace(".", ". ");
//Or
//test = test.Replace(" - ", "-").Replace(".", ". ");
string[] allwords = test.Split(' ');
List<string> extractedWords=new List<string>();
foreach(string wrd in allwords)
{
if(wrd.Contains("-"))
{
extractedWords.Add(wrd.Replace("-", ""));
}
}

If you only want to select those words use this:
string test = "viv-ek is a good boy.Mah - esh is Cra - zy.";
var words =
Regex
.Matches(test, #"(?<part>\w+)(\s*-\s*(?<part>\w+))+\b")
.Cast<Match>()
.Select(
x => string.Join(
string.Empty,
x.Groups["part"].Captures.Cast<Capture>().SelectMany(capture => capture.Value)))
.ToList();
words is a list containing "vivek","Mahesh","Crazy".
DEMO
Replacing words will work the same way:
var replacingValues = new Dictionary<string, string> { { "Crazy", "XXX" } };
var test = "viv-ek is a good boy.Mah - esh is Cra - zy.";
var replacedTest =
Regex.Replace(
test,
#"\b(?<part>\w+)(\s*-\s*(?<part>\w+))+\b",
match =>
{
var word = string.Join(string.Empty, match.Groups["part"].Captures.Cast<Capture>().SelectMany(capture => capture.Value));
string replacingValue;
return replacingValues.TryGetValue(word, out replacingValue) ? replacingValue : match.Value;
});
replacedTestcontains viv-ek is a good boy.Mah - esh is XXX.
DEMO

How to find largest word that starts with a capital and add a separator and space

I have code that finds largest word that starts with a capital letter. But I need that word to add a separator and space. Any ideas how I should do it properly?
char[] skyrikliai = { ' ', '.', ',', '!', '?', ':', ';', '(', ')', '\t' };
string eilute = "Arvydas (g. 1964 m. gruodzio 19 d. Kaune)– Lietuvos, krepsininkas, olimpinis ir pasaulio cempionas, nuo 2011 m. spalio 24 d.";
static string Ilgiausias(string eilute, char[] skyrikliai)
{
string[] parts = eilute.Split(skyrikliai,
StringSplitOptions.RemoveEmptyEntries);
string ilgiaus = "";
foreach (string zodis in parts)
if ((zodis.Length > ilgiaus.Length) && (zodis[0].ToString() == zodis[0].ToString().ToUpper()))
ilgiaus = zodis;
return ilgiaus;
}
It should find word Lietuvos and add , and space
Result should be "Lietuvos, "

I would use LINQ for that:
var ilgiaus = parts.Where(s => s[0].IsUpper())
.OrderByDescending(s => s.Length)
.FirstOrDefault();
if(ilgiaus != null) {
return ilgiaus + ", ";
}

Also you can use regex and linq. You dont need to split by many characters.
Regex regex = new Regex(#"[A-Z]\w*");
string str = "Arvydas (g. 1964 m. gruodzio 19 d. Kaune)– Lietuvos, krepsininkas, olimpinis ir pasaulio cempionas, nuo 2011 m. spalio 24 d.";
string longest = regex.Matches(str).Cast<Match>().Select(match => match.Value).MaxBy(val => val.Length);
if you dont want to use MoreLinq, instead of MaxBy(val => val.Length) you can do OrderByDescending(x => x.Length).First()

There are probably more ingenious and elegant ways, but the following pseudocode should work:
List<String> listOfStrings = new List<String>();
// add some strings to the generic list
listOfStrings.Add("bla");
listOfStrings.Add("foo");
listOfStrings.Add("bar");
listOfStrings.Add("Rompecabeza");
listOfStrings.Add("Rumpelstiltskin");
. . .
String longestWorld = String.Empty;
. . .
longestWord = GetLongestCapitalizedWord(listOfStrings);
. . .
private String GetLongestCapitalizedWord(List<String> listOfStrings)
{
foreach (string s in listofstrings)
{
if ((IsCapitalized(s) && (s.Len > longestWord.Len)))
{
longestWord = s;
}
}
}
private bool IsCapitalized(String s)
{
return // true or false
}

How to keep the delimiters of Regex.Split?

I'd like to split a string using the Split function in the Regex class. The problem is that it removes the delimiters and I'd like to keep them. Preferably as separate elements in the splitee.
According to other discussions that I've found, there are only inconvenient ways to achieve that.
Any suggestions?

Just put the pattern into a capture-group, and the matches will also be included in the result.
string[] result = Regex.Split("123.456.789", #"(\.)");
Result:
{ "123", ".", "456", ".", "789" }
This also works for many other languages:
JavaScript: "123.456.789".split(/(\.)/g)
Python: re.split(r"(\.)", "123.456.789")
Perl: split(/(\.)/g, "123.456.789")
(Not Java though)

Use Matches to find the separators in the string, then get the values and the separators.
Example:
string input = "asdf,asdf;asdf.asdf,asdf,asdf";
var values = new List<string>();
int pos = 0;
foreach (Match m in Regex.Matches(input, "[,.;]")) {
values.Add(input.Substring(pos, m.Index - pos));
values.Add(m.Value);
pos = m.Index + m.Length;
}
values.Add(input.Substring(pos));

Say that input is "abc1defg2hi3jkl" and regex is to pick out digits.
String input = "abc1defg2hi3jkl";
var parts = Regex.Matches(input, #"\d+|\D+")
.Cast<Match>()
.Select(m => m.Value)
.ToList();
Parts would be: abc 1 defg 2 hi 3 jkl

For Java:
Arrays.stream("123.456.789".split("(?<=\\.)|(?=\\.)+"))
.forEach((p) -> {
System.out.println(p);
});
outputs:
123
.
456
.
789
inspired from this post (How to split string but keep delimiters in java?)

Add them back:
string[] Parts = "A,B,C,D,E".Split(',');
string[] Parts2 = new string[Parts.Length * 2 - 1];
for (int i = 0; i < Parts.Length; i++)
{
Parts2[i * 2] = Parts[i];
if (i < Parts.Length - 1)
Parts2[i * 2 + 1] = ",";
}

for c#:
Split paragraph to sentance keeping the delimiters
sentance is splited by . or ? or ! followed by one space (otherwise if there any mail id in sentance it will be splitted)
string data="first. second! third? ";
Regex delimiter = new Regex("(?<=[.?!] )"); //there is a space between ] and )
string[] afterRegex=delimiter.Split(data);
Result
first.
second!
third?