Searching for a string in a string

Question

Dear stackoverflow members,

I have this string:

 string data = "1Position1234Article4321Quantity2Position4323Article3323Quantity";

I want to search for the values where the "keyword" is Position. In this case I want to get back 1 and 2. Each value is "indexed" with its own "keyword". So the value 1 in this string has the Position seperator. The value 1234 has the Article seperator and the value 4321 has the Quantity seperator.

I need a way to search through the string and want to get all positions, articles and quantitys back. Without the keywords.

Output shout be:

 string[] position = {"1", "2"};
 string[] article = {"1234", "4323"};
 string[] quantity = {"4321", "3323"};

Hopefully some can help me here.

Thanks!

Are you restricting values to numbers and separators to strings? Otherwise, it can be interpreted other ways, like the value "1P" having the separator "osition". — piojo
– piojo, Commented Dec 3, 2014 at 10:44
@piojo the string is starting with the value then the seperator. the first value is 1 and the seperator is Position. The second value is 1234 and the seperator is Article, and so on. I want to value before the seperator. — herz
– herz, Commented Dec 3, 2014 at 10:46

Marco · Accepted Answer · 2014-12-03 10:59:30Z

This is q quick solution I've come up with in LinqPad:

void Main()
{
        string data = "1Position1234Article4321Quantity2Position4323Article3323Quantity";
        var Articles = Indices(data, "Article").Dump("Articles: ");
        var Posistions = Indices(data, "Position").Dump("Positions :");
        var Quantities = Indices(data, "Quantity").Dump("Quantities :");
}

// Define other methods and classes here
public List<int> Indices(string source, string keyword)
{
    var results = new List<int>();
    //source: http://stackoverflow.com/questions/3720012/regular-expression-to-split-string-and-number
    var temp = Regex.Split(source, "(?<Alpha>[a-zA-Z]*)(?<Numeric>[0-9]*)").ToList().Where (r => !String.IsNullOrEmpty(r)).ToList();
    //select the list with index only where key word matches
    var indices = temp.Select ((v,i) => new {index = i, value = v})
                      .Where (t => t.value == keyword);
    foreach (var element in indices)
    {
        int val;
        //get previous list entry based on index and parse it
        if(Int32.TryParse(temp[element.index -1], out val))
        {
            results.Add(val);
        }
    }
    return results;
}

Output: enter image description here

Carra · Accepted Answer · 2014-12-03 10:56:03Z

0

Here's a possible algorithm:

Run trough the list and take each number / keyword.
Put them in a dictionary with key "keyword", value a list with all "numbers".
Iterate the dictionary and print they key + its values.

answered Dec 3, 2014 at 10:56

Carra

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Comments

Manu Nair · Accepted Answer · 2014-12-03 12:14:47Z

Below snippet can use to get the output like what you expected.

string data = "1Position1234Article4321Quantity2Position4323Article3323Quantity";

StringBuilder sb = new StringBuilder();
StringBuilder sbWord = new StringBuilder();
bool isDigit = false;
bool isChar = false;
Dictionary<int, string> dic = new Dictionary<int, string>();
int index = 0;

for (int i = 0; i < data.Length; i++)
 {
  if (char.IsNumber(data[i]))
   {
     isDigit = true;
     if (isChar)
      {
         dic.Add(index, sb.ToString() + "|" + sbWord.ToString());
         index++;
         isChar = false;
         sb.Remove(0, sb.Length);
         sbWord.Remove(0, sbWord.Length);
      }

     }
     else
            {
                isDigit = false;
                isChar = true;
                sbWord.Append(data[i]);
            }

            if (isDigit)
                sb.Append(data[i]);

            if (i == data.Length - 1)
            {
                dic.Add(index, sb.ToString() + "|" + sbWord.ToString());
            }
        }

        List<string> Position = new List<string>();
        List<string> Article = new List<string>();
        List<string> Quantity = new List<string>();

        if (dic.Count > 0)
        {
            for (int i = 0; i < dic.Count; i++)
            {
                if (dic[i].Split('|')[1] == "Position")
                    Position.Add(dic[i].Split('|')[0]);


                else if (dic[i].Split('|')[1] == "Article")

                    Article.Add(dic[i].Split('|')[0]);

                else
                    Quantity.Add(dic[i].Split('|')[0]);
            }
        }

        string[] Position_array = Position.ToArray();
        string[] Article_array = Article.ToArray();
        string[] Quantity_array = Quantity.ToArray();

Sanjeev Hegde · Accepted Answer · 2014-12-03 13:27:52Z

Try this simple solution.

class StrSplit{
  public static void main(String args[]){

   int i;
  String str = "1Position1234Article4321Quantity2Position4323Article3323Quantity";
  String pattern=  "(?<=Position)|(?<=Article)|(?<=Quantity)";

  String[] parts = str.split(pattern);
  List<String> Position = new ArrayList<String>();
  List<String> Article = new ArrayList<String>();
  List<String> Quantity = new ArrayList<String>();

     for( i=0;i<parts.length;i++)
     {
          pattern="Position";
          String[] subParts;
          if(parts[i].contains(pattern))
          {
                 subParts = parts[i].split(pattern);
                 Position.add(subParts[0]);
          }
          pattern="Article";
          if(parts[i].contains(pattern))
          {
                   subParts = parts[i].split(pattern);
                   Article.add(subParts[0]);
          }
          pattern="Quantity";
          if(parts[i].contains(pattern))
          {
                  subParts = parts[i].split(pattern);
                  Quantity.add(subParts[0]);
          }

   }
   System.out.println("Position:");
   for(i = 0; i < Position.size(); i++) {
        System.out.println(Position.get(i));
    }
     System.out.println("Article:");
   for(i = 0; i < Article.size(); i++) {
        System.out.println(Article.get(i));
    }
     System.out.println("Quantity:");
 for(i = 0; i < Quantity.size(); i++) {
        System.out.println(Quantity.get(i));
    }
}
}

Output:
Position: 1 2 Article: 1234 4323 Quantity: 4321 3323

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