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Extract substring from the first letter [closed]

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I need to extract substring from string but starting with the first letter
example :
string s1 = "12 x 13 ABC 12# 15.8" substring = ABC 12# 15.8
string s2 = "25 x 32 FER #23.8" substring = FER #23.8
I tried the index of for the letter A or F but it didn't work
thanks

This should work (in case you use a non-letter character instead of x)
string SubstringThis(string input)
{
return new string(input.SkipWhile(c => !char.IsLetter(c)).ToArray());
}

Simple utility function:
string SubstringFromFirstLetter(string s)
{
for (int i=0; i < s.Length; ++i)
{
if (char.IsLetter(s[i]))
{
return s.Substring(i);
}
}
return "";
}
Keep in mind that x is a letter. Do you want it to match only capitalized letters?

public static string GetSubstringStartingWithFirstAlphaCharacter(this string toEvaluate)
{
const string pattern = "([a-zA-Z])(.+)";
var regex = new Regex(pattern);
return regex.Match(toEvaluate).Value;
}

Extract the first two words from a string with C# [closed]

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I guys im trying to workout C# code to extract the first two words from string. below is code im doing.
public static string GetDetailsAsString(string Details)
{
string Items = //how to get first 2 word from string???
if (Items == null || Items.Length == 0)
return string.Empty;
else
return Items;
}

Define "words", if you want to get the first two words that are separated by white-spaces you can use String.Split and Enumerable.Take:
string[] words = Details.Split();
var twoWords = words.Take(2);
If you want them as separate string:
string firstWords = twoWords.First();
string secondWord = twoWords.Last();
If you want the first two words as single string you can use String.Join:
string twoWordsTogether = string.Join(" ", twoWords);
Note that this simple approach will replace new-line/tab characters with empty spaces.

Assuming the words are separated by whitespaces:
var WordsArray=Details.Split();
string Items = WordsArray[0] + ' ' + WordsArray[1];

C# - split string [closed]

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I have some problems with split and check string.
I need to split string, replace halfs and check is this the same as the second string.
example: first string = tokyo second string = koyto
soo... S = a+b = b+a
S - a = b and S - b = a
a and b is part of one string (S) and may have different long in this case a = to and b = koy
first I need to check string length - is the are different - then write Error - it's easy
the I thought that I can compare strings in ASCII (case sensitivity is not important) and it' could be ok but...
I can create string tooky which have got the same size in ASCII but is not created from split and invert parts of first string...
any ideas?
static void Main(string[] args)
{
string S = "tokyo";
string T = "kyoto";
if (S.Length == T.Length)
{
split string ?
}
else
Console.WriteLine("This two words are different. No result found.");
Console.Read();
}

I would suggest doing the comparisons with strings. You can use the String.ToLower() method to convert them both to lowercase for comparison.
I am not exactly sure what problem you are trying to solve is, but from what I understand you are trying to check if string S can be split into two substrings that can be rearranged to make string T.
To check this you will want something similar to the following
for (int i = 0; i < S.length; i++) {
string back = S.substring(i);
string front = S.substring(0,i);
if (T.equals(back + front))
result = true;
}
Hope this helps

If you want to compare equality of two collections you should consider using LINQ:
static void Main(string[] args)
{
string S = "tokyo";
string T = "kyoto";
if (S.Length == T.Length)
{
if (S.Intersect(T).Any())
{
Console.WriteLine("The Contents are the same");
Console.Read();
}
}
else
Console.WriteLine("This two words are diferent. No result found.");
Console.Read();
}

C# read only part of whole string [closed]

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I have a string which has a following format:
"####/xxxxx"
The text before the "/" is always an integer and I need to read it. How do I get only the integer part of this string (before the "/")?
Thank you for your help.

You can split the string on / and then use int.TryParse on the first element of array to see if it is an integer like:
string str = "1234/xxxxx";
string[] array = str.Split(new []{'/'}, StringSplitOptions.RemoveEmptyEntries);
int number = 0;
if (str.Length == 2 && int.TryParse(array[0], out number))
{
//parsing successful.
}
else
{
//invalid number / string
}
Console.WriteLine(number);

Use IndexOf and Substring:
int indexOfSlash = text.IndexOf('/');
string beforeSlash = null;
int numBeforeSlash = int.MinValue;
if(indexOfSlash >= 0)
{
beforeSlash = text.Substring(0, indexOfSlash);
if(int.TryParse(beforeSlash, out numBeforeSlash))
{
// numBeforeSlash contains the real number
}
}

Another alternative: use a regular expression:
var re = new System.Text.RegularExpression(#"^(\d+)/", RegexOptions.Compiled);
// ideally make re a static member so it only has to be compiled once
var m = re.Match(text);
if (m.IsMatch) {
var beforeSlash = Integer.Parse(re.Groups[0].Value);
}

Custom function on Regex replace in Java [closed]

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I need to replace all words in a text by applying a specific replacement method Modify(). I have the following code snippet in C#:
Regex regex = new Regex("[A-Za-z][a-z]*");
regex.Replace(text, x => Modify(x.Value));
The Modify() function is some function that is executed to modify each match, for example it could replace all the characters in a word with the next alphabetical character. For example, if this is the input text:
Magic banana is eating the apple.
This could be the output:
Nbhjd cbobob jt fbujoh uif bqqmf.
The purpose of the Modify() function is irrelevant here. I am wondering about the Java implementation of the MatchEvaluator. The code is fairly simple in C#, but how would this be achieved in Java?

How about something along this lines:
public static void main(String[] args) {
String text = "Magic banana is eating the apple.";
System.out.println("Old text: " + text);
System.out.println("New text: " + getEditedText(text));
}
private static String getEditedText(String text) {
StringBuffer result = new StringBuffer();
Pattern pattern = Pattern.compile("[A-Za-z][a-z]*");
Matcher matcher = pattern.matcher(text);
while (matcher.find()) {
matcher.appendReplacement(result, getReplacement(matcher));
}
matcher.appendTail(result);
return result.toString();
}
private static String getReplacement(Matcher matcher) {
String word = matcher.group(0);
StringBuilder sb = new StringBuilder();
for (int i = 0; i < word.length(); i++) {
char c = word.charAt(i);
sb.append((char)(c + 1));
}
return sb.toString();
}
This is a slightly edited example of the code that can be found at the bottom of this page.
This is the output you would get:
Old text: Magic banana is eating the apple.
New text: Nbhjd cbobob jt fbujoh uif bqqmf.