正则表达式匹配任何字母，空格或特定数字

Question

I'm trying to create a regex to match all letters or spaces or specific number.

Here's what I have.

([a-zA-Z\s24]*)

 #but this is matching a 2 or a 4, i need exactly 24 only

ex:
- asdfafasf asfasdf  #should match asdfafasf asfasdf
- asdf asdf asdf 24  #should match asdf asdf asdf 24
- asdf24asdfasdf as  #should match asdf24asdfasdf as
- asdfadf2 asdf      #should match asdfadf
- asdfasdf kljl 6    #should match asdfasdf kljl 

https://regex101.com/r/iNWuRb/1

Answer 1

You put a sequence of chars into a character class. A character class is meant to match a single char defined in the character class, thus, what you did can't work.

You need to use a grouping construct, an alternation group, and acc. to the expected matches, you need to only match at the start of the string:

^(?:24|[a-zA-Z\s])+

See the regex demo

Details

• ^ - start of string
• (?:24|[a-zA-Z\s])+ - one or more occurrences of:
  • 24 - a substring 24
  • | - or
  • [a-zA-Z\s] - an ASCII letter or whitespace