Develop Reference

Repeat substrings N times

I receive series of strings followed by non-negative numbers, e.g. "a3". I have to print on the console each string repeated N times (uppercase) where N is a number in the input. In the example, the result: "AAA". As you see, I have tried to get the numbers from the input and I think it's working fine. Can you help me with the repeating?
string input = Console.ReadLine();
//input = "aSd2&5s#1"
MatchCollection matched = Regex.Matches(input, #"\d+");
List<int> repeatsCount = new List<int>();
foreach (Match match in matched)
{
int repeatCount = int.Parse(match.Value);
repeatsCount.Add(repeatCount);
}
//repeatsCount: [2, 5, 1]
//expected output: ASDASD&&&&&S# ("aSd" is converted to "ASD" and repeated twice;
// "&" is repeated 5 times; "s#" is converted to "S#" and repeated once.)
For example, if we have "aSd2&5s#1":
"aSd" is converted to "ASD" and repeated twice; "&" is repeated 5 times; "s#" is converted to "S#" and repeated once.

Let the pattern include two groups: value to repeat and how many times to repeat:
#"(?<value>[^0-9]+)(?<times>[0-9]+)"
Then we can operate with these groups, say, with a help of Linq:
string source = "aSd2&5s#1";
string result = string.Concat(Regex
.Matches(source, #"(?<value>[^0-9]+)(?<times>[0-9]+)")
.OfType<Match>()
.SelectMany(match => Enumerable // for each match
.Repeat(match.Groups["value"].Value.ToUpper(), // repeat "value"
int.Parse(match.Groups["times"].Value)))); // "times" times
Console.Write(result);
Outcome:
ASDASD&&&&&S#
Edit: Same idea without Linq:
StringBuilder sb = new StringBuilder();
foreach (Match match in Regex.Matches(source, #"(?<value>[^0-9]+)(?<times>[0-9]+)")) {
string value = match.Groups["value"].Value.ToUpper();
int times = int.Parse(match.Groups["times"].Value);
for (int i = 0; i < times; ++i)
sb.Append(value);
}
string result = sb.ToString();

You can extract substring and how often it should be repeated with this regex:
(?<content>.+?)(?<count>\d+)
Now you can use a StringBuilder to create output string. Full code:
var input = "aSd2&5s#1";
var regex = new Regex("(?<content>.+?)(?<count>\\d+)");
var matches = regex.Matches(input).Cast<Match>();
var sb = new StringBuilder();
foreach (var match in matches)
{
var count = int.Parse(match.Groups["count"].Value);
for (var i = 0; i < count; ++i)
sb.Append(match.Groups["content"].Value.ToUpper());
}
Console.WriteLine(sb.ToString());
Output is
ASDASD&&&&&S#

Another solution without LINQ
i tried to keep the solution so it would be similar to yours
string input = "aSd2&5s#1";
var matched = Regex.Matches(input, #"\d+");
var builder = new StringBuilder();
foreach (Match match in matched)
{
string stingToDuplicate = input.Split(Char.Parse(match.Value))[0];
input = input.Replace(stingToDuplicate, String.Empty).Replace(match.Value, String.Empty);
for (int i = 0; i < Convert.ToInt32(match.Value); i++)
{
builder.Append(stingToDuplicate.ToUpper());
}
}
and finally Console.WriteLine(builder.ToString());
which result ASDASD&&&&&S#

My solution is same as others with slight differences :
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
namespace ConsoleApplication107
{
class Program
{
static void Main(string[] args)
{
string input = "aSd2&5s#1";
string pattern1 = #"[a-zA-z#&]+\d+";
MatchCollection matches = Regex.Matches(input, pattern1);
string output = "";
foreach(Match match in matches.Cast<Match>().ToList())
{
string pattern2 = #"(?'string'[^\d]+)(?'number'\d+)";
Match match2 = Regex.Match(match.Value, pattern2);
int number = int.Parse(match2.Groups["number"].Value);
string str = match2.Groups["string"].Value;
output += string.Join("",Enumerable.Repeat(str.ToUpper(), number));
}
Console.WriteLine(output);
Console.ReadLine();
}
}
}

Very simple program. No linq nothing, simple string and for loop.
string input = "aSd2&5s#1";
char[] inputArray = input.ToCharArray();
string output = "";
string ab = "";
foreach (char c in inputArray)
{
int x;
string y;
if(int.TryParse(c.ToString(), out x))
{
string sb = "";
ab = ab.ToUpper();
for(int i=0;i<b;i++)
{
sb += ab;
}
ab = "";
output += sb;
}
else
{
ab += c;
}
}
if(!string.IsNullOrEmpty(ab))
{
output += ab.ToUpper();
}
Console.WriteLine(output);
Hope it helps.

Splitting a line of text that has key value pairs where value can be empty

I need to split a line of text
The general syntax for a delivery instruction is |||name|value||name|value||…..|||
Each delivery instruction starts and ends with 3 pipe characters - |||
A delivery instruction is a set of name/value pairs separated by a single pipe eg name|value
Each name value pair is separated by 2 pipe characters ||
Names and Values may not contain the pipe character
The value of any pair may be a blank string.
I need a regex that will help me resolve the above problem.
My latest attempt with my limited Regex skills:
string SampleData = "|||env|af245g||mail_idx|39||gen_date|2016/01/03 11:40:06||docm_name|Client Statement (01.03.2015−31.03.2015)||docm_cat_name|Client Statement||docm_type_id|9100||docm_type_name|Client Statement||addr_type_id|1||addr_type_name|Postal address||addr_street_nr|||addr_street_name|Robinson Road||addr_po_box|||addr_po_box_type|||addr_postcode|903334||addr_city|Singapore||addr_state|||addr_country_id|29955||addr_country_name|Singapore||obj_nr|10000023||bp_custr_type|Customer||access_portal|Y||access_library|Y||avsr_team_id|13056||pri_avsr_id|||pri_avsr_name|||ctact_phone|||dlv_type_id|5001||dlv_type_name|Channel to standard mail||ao_id|14387||ao_name|Corp Limited||ao_title|||ao_mob_nr|||ao_email_addr||||??";
string[] Split = Regex.Matches(SampleData, "(\|\|\|(?:\w+\|\w*\|\|)*\|)").Cast<Match>().Select(m => m.Value).ToArray();
The expected output should be as follows(based on the sample data string provided):
env|af245g
mail_idx|39
gen_date|2016/01/03 11:40:06
docm_name|Client Statement (01.03.2015−31.03.2015)
docm_cat_name|Client Statement
docm_type_id|9100
docm_type_name|Client Statement
addr_type_id|1
addr_type_name|Postal address
addr_street_nr|
addr_street_name|Robinson Road
addr_po_box|
addr_po_box_type|
addr_postcode|903334
addr_city|Singapore
addr_state|
addr_country_id|29955
addr_country_name|Singapore
obj_nr|10000023
bp_custr_type|Customer
access_portal|Y
access_library|Y
avsr_team_id|13056
pri_avsr_id|
pri_avsr_name|
ctact_phone|
dlv_type_id|5001
dlv_type_name|Channel to standard mail
ao_id|14387
ao_name|Corp Limited
ao_title|
ao_mob_nr|
ao_email_addr|

You can also do it without using Regex. Its just simple splitting.
string nameValues = "|||zeeshan|1||ali|2||ahsan|3|||";
string sub = nameValues.Substring(3, nameValues.Length - 6);
Dictionary<string, string> dic = new Dictionary<string, string>();
string[] subsub = sub.Split(new string[] {"||"}, StringSplitOptions.None);
foreach (string item in subsub)
{
string[] nameVal = item.Split('|');
dic.Add(nameVal[0], nameVal[1]);
}
foreach (var item in dic)
{
// Retrieve key and value here i.e:
// item.Key
// item.Value
}
Hope this helps.

I think you're making this more difficult than it needs to be. This regex yields the desired result:
#"[^|]+\|([^|]*)"
Assuming you're dealing with a single, well-formed delivery instruction, there's no need to match the starting and ending triple-pipes. You don't need to worry about the double-pipe separators either, because the "name" part of the "name|value" pair is always present. Just look for the first thing that looks like a name with a pipe following it, and everything up to the next pipe character is the value.

(?<=\|\|\|).*?(?=\|\|\|)
You can use this to get all the key value pairs between |||.See demo.
https://regex101.com/r/fM9lY3/59
string strRegex = #"(?<=\|\|\|).*?(?=\|\|\|)";
Regex myRegex = new Regex(strRegex, RegexOptions.Multiline);
string strTargetString = #"|||env|af245g||mail_idx|39||gen_date|2016/01/03 11:40:06||docm_name|Client Statement (01.03.2015−31.03.2015)||docm_cat_name|Client Statement||docm_type_id|9100||docm_type_name|Client Statement||addr_type_id|1||addr_type_name|Postal address||addr_street_nr|||addr_street_name|Robinson Road||addr_po_box|||addr_po_box_type|||addr_postcode|903334||addr_city|Singapore||addr_state|||addr_country_id|29955||addr_country_name|Singapore||obj_nr|10000023||bp_custr_type|Customer||access_portal|Y||access_library|Y||avsr_team_id|13056||pri_avsr_id|||pri_avsr_name|||ctact_phone|||dlv_type_id|5001||dlv_type_name|Channel to standard mail||ao_id|14387||ao_name|Corp Limited||ao_title|||ao_mob_nr|||ao_email_addr||||??";
foreach (Match myMatch in myRegex.Matches(strTargetString))
{
if (myMatch.Success)
{
// Add your code here
}
}

Here's a variation of #Syed Muhammad Zeeshan code that runs faster:
string nameValues = "|||zeeshan|1||ali|2||ahsan|3|||";
string[] nameArray = nameValues.Split(new char[] { '|' }, StringSplitOptions.RemoveEmptyEntries);
Dictionary<string, string> dic = new Dictionary<string, string>();
int i = 0;
foreach (string item in nameArray)
{
if (i < nameArray.Length - 1)
dic.Add(nameArray[i], nameArray[i + 1]);
i = i + 2;
}

Interesting, I will like to try:
class Program
{
static void Main(string[] args)
{
string nameValueList = "|||zeeshan|1||ali|2||ahsan|3|||";
while (nameValueList != "|||")
{
nameValueList = nameValueList.TrimStart('|');
string nameValue = GetNameValue(ref nameValueList);
Console.WriteLine(nameValue);
}
Console.ReadLine();
}
private static string GetNameValue(ref string nameValues)
{
string retVal = string.Empty;
while(nameValues[0] != '|') // for name
{
retVal += nameValues[0];
nameValues = nameValues.Remove(0, 1);
}
retVal += nameValues[0];
nameValues = nameValues.Remove(0, 1);
while (nameValues[0] != '|') // for value
{
retVal += nameValues[0];
nameValues = nameValues.Remove(0, 1);
}
return retVal;
}
}
https://dotnetfiddle.net/WRbsRu

Extract string list from a long string using prefix pattern in C#

I have a very big string with a lot of usernames. I want to extract the names from the string. That means I have one big string with lot of names in it. At the end I want every username in a string array.
An example of the string:
blablablabla#User;\u0004User\username,blablablablablablablabla#User;\u0004User\anotherusername,#Viewblablablablablablablabla
Search for: u0004User\
Save all charractes until , is found in the string array
Pseudocode:
string [] array = new string []{};
int i = 0;
foreach (var c in bigdata)
{
if(c == "u0004User\")
{
array[i] = c.AllCharactersUntil(',');
i++;
//AllCharactersUntil is a pseudo function
}
}

You can use string.IndexOf to find the index of "u0004User\" then again to find the following comma. Then use string.Substring to get the name. Keeping track of the current index and using it to tell IndexOf where to start searching from.
string bigdata =
#"blablablabla#User;\u0004User\username,blablablablablablablabla#User;\u0004User\anotherusername,#Viewblablablablablablablabla";
string searchValue = #"u0004User\";
int index = 0;
List<string> names = new List<string>();
while (index < bigdata.Length)
{
index = bigdata.IndexOf(searchValue, index);
if (index == -1) break;
int start = index + searchValue.Length;
int end = bigdata.IndexOf(',', start);
if (end == -1) break;
names.Add(bigdata.Substring(start, end - start));
index = end + 1;
}
Console.WriteLine(string.Join(", ", names));
That will give you the following output
username, anotherusername
NOTE
I've assumed that the "\u0004" values are those 6 characters and not a single unicode character. If it is a unicode character then you need the following change
string searchValue = "\u0004User\\";

Here's a simple result:
string input = "blablablabla#User;\\u0004User\username,blablablablablablablabla#User;\\u0004User\anotherusername,#Viewblablablablablablablabla";
List<string> userNames = new List<string>();
foreach (Match match in Regex.Matches(input, #"(u0004User\\)(.*?),", RegexOptions.IgnoreCase))
{
string currentUserName = match.Groups[2].ToString();
userNames.Add(currentUserName); // Add UserName to List
}

Find phone number from given string c#

I have one resume , i want to find user's contact number(Mobile no or Phone no)
from the resume, Need any idea or solution or any assistance for achieving the goal .
What i Have tried so far....
var numString = "";
string strData = ",38,,,,,,,,,,,,,,,,,,,,,,,,,,,,382350,,,,,0,,,,8141884584,,,,,,,,";
char[] separator = new char[] { ',' };
string[] strSplitArr = strData.Split(separator);
for (int q = 0; q < strSplitArr.Length; q++)
{
if (strSplitArr[q] != "")
{
int no = 0;
no = strSplitArr[q].Length;
if (no >= 10 && no <= 12)
{
numString += strSplitArr[q].ToString() + ", ";
}
}
}

I would suggest that you use Regular Expression
Here is a sample code to find US Phone numbers:
string text = MyInputMethod();
const string MatchPhonePattern =
#"\(?\d{3}\)?-? *\d{3}-? *-?\d{4}";
Regex rx = new Regex(MatchPhonePattern, RegexOptions.Compiled | RegexOptions.IgnoreCase);
// Find matches.
MatchCollection matches = rx.Matches(text);
// Report the number of matches found.
int noOfMatches = matches.Count;
//Do something with the matches
foreach (Match match in matches)
{
//Do something with the matches
string tempPhoneNumber= match.Value.ToString(); ;
}

Replace placeholders in order

I have a part of a URL like this:
/home/{value1}/something/{anotherValue}
Now i want to replace all between the brackets with values from a string-array.
I tried this RegEx pattern: \{[a-zA-Z_]\} but it doesn't work.
Later (in C#) I want to replace the first match with the first value of the array, second with the second.
Update: The /'s cant be used to separate. Only the placeholders {...} should be replaced.
Example: /home/before{value1}/and/{anotherValue}
String array: {"Tag", "1"}
Result: /home/beforeTag/and/1
I hoped it could works like this:
string input = #"/home/before{value1}/and/{anotherValue}";
string pattern = #"\{[a-zA-Z_]\}";
string[] values = {"Tag", "1"};
MatchCollection mc = Regex.Match(input, pattern);
for(int i, ...)
{
mc.Replace(values[i];
}
string result = mc.GetResult;
Edit:
Thank you Devendra D. Chavan and ipr101,
both solutions are greate!

You can try this code fragment,
// Begin with '{' followed by any number of word like characters and then end with '}'
var pattern = #"{\w*}";
var regex = new Regex(pattern);
var replacementArray = new [] {"abc", "cde", "def"};
var sourceString = #"/home/{value1}/something/{anotherValue}";
var matchCollection = regex.Matches(sourceString);
for (int i = 0; i < matchCollection.Count && i < replacementArray.Length; i++)
{
sourceString = sourceString.Replace(matchCollection[i].Value, replacementArray[i]);
}

[a-zA-Z_] describes a character class. For words, you'll have to add * at the end (any number of characters within a-zA-Z_.
Then, to have 'value1' captured, you'll need to add number support : [a-zA-Z0-9_]*, which can be summarized with: \w*
So try this one : {\w*}
But for replacing in C#, string.Split('/') might be easier as Fredrik proposed. Have a look at this too

You could use a delegate, something like this -
string[] strings = {"dog", "cat"};
int counter = -1;
string input = #"/home/{value1}/something/{anotherValue}";
Regex reg = new Regex(#"\{([a-zA-Z0-9]*)\}");
string result = reg.Replace(input, delegate(Match m) {
counter++;
return "{" + strings[counter] + "}";
});

My two cents:
// input string
string txt = "/home/{value1}/something/{anotherValue}";
// template replacements
string[] str_array = { "one", "two" };
// regex to match a template
Regex regex = new Regex("{[^}]*}");
// replace the first template occurrence for each element in array
foreach (string s in str_array)
{
txt = regex.Replace(txt, s, 1);
}
Console.Write(txt);