How to first 'Split a string to an Array' then 'Add something to that Array'? || C# Console App

Question

I'm trying to create a program that splits a string to an array then adds to that array.

Splitting the string works but adding to the array is really putting up a fight.

//here i create the text
string text = Console.ReadLine();
Console.WriteLine();

//Here i split my text to elements in an Array 
var punctuation = text.Where(Char.IsPunctuation).Distinct().ToArray();
var words = text.Split().Select(x => x.Trim(punctuation));

//here i display the splitted string
foreach (string x in words)
{
  Console.WriteLine(x);
}

//Here a try to add something to the Array
Array.words(ref words, words.Length + 1);
words[words.Length - 1] = "addThis";

//I try to display the updated array
foreach (var x in words)
{
  Console.WriteLine(x);
}

//Here are the error messages |*error*|
Array.|*words*|(ref words, words.|*Length*| + 1);
words[words.|*Length*| - 1] = "addThis";

'Array' does not contain definition for 'words'

Does not contain definition for Length

Does not contain definition for length */

stackoverflow.com/questions/1440265/… and stackoverflow.com/questions/1126915/… there are tons of answers for your two questions. It took less than 30 seconds — Kevin
– Kevin, Commented Oct 17, 2019 at 7:16
Possible duplicate of How to add a string to a string[] array? There's no .Add function — Kevin
– Kevin, Commented Oct 17, 2019 at 7:17
Always use the right tool ! Arrays are not made for this; use List<T> ! — TaW
– TaW, Commented Oct 17, 2019 at 7:19

Andrew Williamson · Accepted Answer · 2019-10-17 07:19:04Z

2

Convert the IEnumerable to List:

var words = text.Split().Select(x => x.Trim(punctuation)).ToList();

Once it is a list, you can call Add

words.Add("addThis");

edited Oct 17, 2019 at 7:19

Andrew Williamson

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answered Oct 17, 2019 at 7:17

joehoper

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1 Comment

Coding to beat Goku Over a year ago

think ill try with array first but i appreciate the answer !

Dmitrii Bychenko · Accepted Answer · 2019-10-17 08:22:19Z

0

Technically, if you want to split on punctuation, I suggest Regex.Split instead of string.Split

  using System.Text.RegularExpressions;

  ...

  string text = 
    @"Text with punctuation: comma, full stop. Apostroph's and ""quotation?"" - ! Yes!";

  var result = Regex.Split(text, @"\p{P}");

  Console.Write(string.Join(Environment.NewLine, result));

Outcome:

Text with punctuation      # Space is not a punctuation, 3 words combined
 comma
 full stop
 Apostroph                 # apostroph ' is a punctuation, split as required
s and 
quotation



 Yes

if you want to add up some items, I suggest Linq Concat() and .ToArray():

    string text = 

    string[] words = Regex
      .Split(text, @"\p{P}")
      .Concat(new string[] {"addThis"})
      .ToArray();

However, it seems that you want to extract words, not to split on puctuation which you can do matching these words:

  using System.Linq;
  using System.Text.RegularExpressions;

  ...

  string text = 
    @"Text with punctuation: comma, full stop. Apostroph's and ""quotation?"" - ! Yes!";

  string[] words = Regex
    .Matches(text, @"[\p{L}']+") // Let word be one or more letters or apostrophs
    .Cast<Match>()
    .Select(match => match.Value)
    .Concat(new string[] { "addThis"})
    .ToArray();

  Console.Write(string.Join(Environment.NewLine, result));

Outcome:

Text
with
punctuation
comma
full
stop
Apostroph's
and
quotation
Yes
addThis

edited Oct 17, 2019 at 8:22

answered Oct 17, 2019 at 7:27

Dmitrii Bychenko

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1 Comment

Coding to beat Goku Over a year ago

thanks a lot ! im gonna look into Regex and Concat to understand this better :)

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