CODEWITHSUNDEEP
regexstringsplit
Vincent L
Vincent L

Reputation: 739

Regex to split string by whitespace OR minus signs in C#

I have a string with a list of temperatures that can be in the negatives or positives.

Some of these temperatures will be separated by a whitespace, while some won't be.

i.e.: 19 20 22 -1 -3-4-10 -7 2 10

And I want to split that string by keeping only the values as such:

19
20
22
-1
-3
-4
-10
-7
2
10

Can anyone help me with that? I am not experienced with regular expressions.

Thank you VERY much in advance!

Cheers

Upvotes: 0

Views: 228

Answers (2)

Nader Hisham
Nader Hisham

Reputation: 5414

you can use this regex 

  (?!-)|(?=-)

check this demo Demo

string temperatures = "19 20 22 -1 -3-4-10 -7 2 10";

string[] res = Regex.Split(temperatures, " (?!-)|(?=-)");

foreach (var item in res)
{
    Console.WriteLine(item);
}

#19
#20
#22
#-1
#-3
#-4
#-10
#-7
#2
#10

Upvotes: 0

Avinash Raj
Avinash Raj

Reputation: 174706

Just split according to the below regex.

@"\s+|(?<!\s)(?=-)"

DEMO

ie,

string[] split = Regex.Split(input_str, @"\s+|(?<!\s)(?=-)");

Upvotes: 3

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