regex match only specific file lines

Question

I have a file containing lines like:

13  
13-55  
some text 11  

I want to create a regex to match only first to type of lines, but not the last one. Reges created by me is [0-9\\-]+

Answer 1

You have to specify that you are testing from the beggining to the end of the string:

Try with following regex:

^[0-9-]+$

Answer 2

Try using anchors ( ^ and $ to denote beginning and end of string respectively) and use the multiline option (this one depends on the language/engine/environment of the regex).

^[0-9-]+$

Note, you can drop the backslash for the - if it's at the beginning or end of a character class.

Answer 3

如果要匹配以数字开头的行。

^[0-9-]+$