CODEWITHSUNDEEP
regexnumbers
Zorrocaesar
Zorrocaesar

Reputation: 748

Regular expression for getting exact number

I have some comma separated numbers in a string out of which I want to match a specific number. For the example string "18, 34, 22, 9, 2, 56" I want to match the number "2" but not the two "2s" in 22. How can I obtain that?

Upvotes: 2

Views: 113

Answers (4)

Stephane Rouberol
Stephane Rouberol

Reputation: 4384

you can use grep

echo "18, 34, 22, 9, 2, 56" | grep -E -o "^2,| 2,| 2$"

and substitute '2' in grep regex by any number you search in your comma separated numbers string

Upvotes: 0

hendrik
hendrik

Reputation: 2042

You can solve that without a regular expression using ordinary string functions which are provided by most of the prog languages. For example one solution in Python. Add a comma at the start and the end:

s=", 18, 34, 22, 9, 2, 56,"
s.find(', 2,')

In case the search string can't be found the function returns -1. In case you insist on a regexp the pattern could look the same.

Upvotes: 1

user905481
user905481

Reputation:

This maybe not the best method but you can try something like this

                string NUmbers= "18,22,34,52";
                string[] NewNos=NUmbers.Split(',');

                for(int i=0;i<NewNos.Length;i++)
                {
                    if(NewNos[i].ToString().Contains("2"))
                    {
                    //do whatever you want

                    }
                }

Upvotes: 0

burning_LEGION
burning_LEGION

Reputation: 13450

use this regular expression \b2\b replace 2 with your value

Upvotes: 1

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