CODEWITHSUNDEEP
c#arraysstring
SuperMinefudge
SuperMinefudge

Reputation: 301

Make array out of specific characters in a string

So lets say i have a string : "a = b + c - d"

I want to create a character array that will hold these expression signs(=,-,+,) and convert them to an array for example in this case the array would be {'=','+','-'}

example of the code:

   string s = "a = b + c -d"
   char[] array = s.???('=','-','+');

is there an easy way to this is without loops?

Thanks in advance :)

Upvotes: 2

Views: 59

Answers (2)

Sergey Berezovskiy
Sergey Berezovskiy

Reputation: 236328

You can use LINQ to select characters which are not letters or whitespace

var array = s.Where(c => !Char.IsLetter(c) && !Char.IsWhiteSpace(c)).ToArray();

Output:

[ '=',  '+',  '-' ]

You can also create extension method to make code more readable and select only math operators

public static class Extensions
{
    private static HashSet<char> mathOperators =
        new HashSet<char>(new[] { '+', '-', '=' }); // add more symbols here
    public static bool IsMathOperator(this char c) => mathOperators.Contains(c);
}

And usage

var array = s.Where(c => c.IsMathOperator()).ToArray();

Upvotes: 2

Pikoh
Pikoh

Reputation: 7713

You could use linq and do something like this:

char[] operators = new char[] { '=', '-', '+' };
string s = "a = b + c -d";
var opArray = s.Where(x=>operators.Contains(x)).ToArray();

You can add all the operators you need in the operators array

Upvotes: 4

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