How to split string inside string array?

Question

Below is my string array :

 public string[] categories { get; set; }

Now this categories contains records like below :

 "categories": [
    "electronic,sports",
    "abc,pqr",
    "xyz",
  ]

Input:

string[] categories = { "electronic,sports", "abc,pqr", "xyz"};

Now I want to split values in categories and create records like this but in categories variable only :

So final categories variable should contain output like below:

"categories": [
    "electronic",
    "sports",
    "abc",
    "pqr",
    "xyz",
  ]

So I want my loop to run 5 times; if I loop on to categories variable and further lots of operation is done on this variable only so I don't want to take above final output in other variable.

 foreach (var category in categories)
 {
     //code
 }

categories = categories.SelectMany(o => o.Split(',')).ToArray(); ? — har07
– har07, Commented Dec 29, 2016 at 6:49

har07 · Accepted Answer · 2016-12-29 07:03:51Z

7

You can use LINQ SelectMany() and then project the result to array :

using System.Linq;


string[] categories = { "electronic,sports", "abc,pqr", "xyz"};
categories = categories.SelectMany(o => o.Split(',')).ToArray();

foreach(var c in categories)
{
    Console.WriteLine(c);
}

demo

output :

electronic
sports
abc
pqr
xyz

edited Dec 29, 2016 at 7:03

answered Dec 29, 2016 at 6:56

har07

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I Love Stackoverflow Over a year ago

Yes this worked.thank you so much for the kind help and please keep helping like this.Thank you once again :)

pridemkA · Accepted Answer · 2016-12-29 06:52:03Z

2

You can try without if code;

        List<string> temps = new List<string>();
        foreach (var category in categories)
        {
            temps.AddRange(category.Split(',').ToList());
        }
        categories = temps.ToArray();

answered Dec 29, 2016 at 6:52

pridemkA

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1 Comment

I Love Stackoverflow Over a year ago

Thank you so much for the help and please keep helping like this :)

Mohit S · Accepted Answer · 2016-12-29 06:49:21Z

1

This might do the trick for you

List<string> newcategories = new List<string>();
foreach(var category in categories)
{
    if(category.Contains(","))
    {
        string[] c = category.Split(',');
        newcategories.Add(c[0]);
        newcategories.Add(c[1]);
    }
    else
    {
        newcategories.Add(category);
    }
}

answered Dec 29, 2016 at 6:49

Mohit S

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1 Comment

I Love Stackoverflow Over a year ago

Sorry as i said in my question that i dont want to use new variable.i want in my categories string array only

Switch386 · Accepted Answer · 2016-12-29 06:54:44Z

1

Without linq...just using a couple foreach loops.

        string[] categories = new string[] { "electronic,sports", "abc,pqr", "xyz" };

        foreach(var category in categories)
        {
            foreach(var item in category.Split(','))
            {
                Console.WriteLine(item);
            }
        }

answered Dec 29, 2016 at 6:54

Switch386

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1 Comment

I Love Stackoverflow Over a year ago

Thank you so much for the help and please keep helping like this :)

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