extract specific string & int

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I have 'list' variable, which contains values such as - ASW+90s, 160, 160S, M45s, 130.5. R+129.

I would like to know, how can I extract strings such as 160s and R+129.
Here is my attempt so far, but I keep experiencing compiling errors:

C#

else if (Int32.TryParse(list, out i))
                               {
                                   string b = "";
                                   b += list == "S";
                                   if (Math.Abs(i) >= 125 && b)
                                   {
                                       string a = "";
                                       a += i.ToString();
                                       row["Value"] = a;
                                   }
                               }

if someone could help to define, the logic required to implement this task further, that would be a great help, to progress forward.

Any help much appreciated.
Thanks

Posted 27-Jan-15 1:19am

miss786

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Comments

Praveen Kumar Upadhyay 27-Jan-15 7:26am

Be more specific what output you want and what is your condition.

miss786 27-Jan-15 7:35am

apology for the being clearer.

My if conditions are:
- extract values which are >125 & contains 's' at the end of the string (i.e. 160s)
- extract values which contain alphabet & '+' & number (i.e. R+160)

desired output:
the extracted values, be placed inside 'row["Value"] = ?'

I hope this helps, to clarify my desired output.
Thank you for your help.

Zoltán Zörgő 27-Jan-15 7:26am

Regexp will be your friend, but better define what do you want to extract, as for me R+129 does differ from M45s or whatever.

miss786 27-Jan-15 7:36am

thank you for your reply. please see the above reply, for I what i would like to extract from the list variable. Thank you for suggesting 'Regexp', I shall look into that.
Many thanks

2 solutions

Solution 1

Try this,

C#

static void Main(string[] args)
{
    String tmp = @"(\s\b[1-9](([2][5-9])|([3-9][0-9]))[sS])|(\s\b[aA-zZ]\+\d+)";
    String input = "ASW+90s, 160, 160S, M45s, 130.5. R+129";

    Regex exp = new Regex(tmp);
    MatchCollection col = exp.Matches(input);

}

Posted 27-Jan-15 2:12am

_Asif_

Comments

Zoltán Zörgő 27-Jan-15 8:32am

Good! But will match leading spaces, will match 125S too (it is not > 125) and it is limited to 3 digit numbers. Besides the fact that all values in the example are below 999 OP never mentioned this limitation.

_Asif_ 27-Jan-15 23:25pm

How long would it take to fix these limitations? My intention is to float the idea so rest can fine tune it :)

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**Zoltán Zörgő** · Accepted Answer · 2015-01-27T02:26:00

Here you have it:

C#

var str = "ASW+90s, 160, 160S, M45s, 130.5, R+129";
var list = str.Split(new string[] {", "}, StringSplitOptions.RemoveEmptyEntries);

var re1 = new Regex(@"^[A-Za-z]\+\d+$");
var re2 = new Regex(@"^(\d+)[sS]$");

var result = from element in list
             let m2 = re2.Match(element)
             where re1.Match(element).Success || (m2.Success && int.Parse(m2.Groups[1].Value) > 125)
             select element;

result.Dump();

This is not pure-regexp, as I am using semantic validation for the second criteria. And it is working on a concrete list/array, but as you can see it is quite simple to split the string into a list/array.