CODEWITHSUNDEEP
regex
Rockwell Rice
Rockwell Rice

Reputation: 3002

RegEx that will make sure that the first character after a space in a string is a `#`

Trying to build a regex to verify a string that would look something like this

#tag #tag2 #tag3 and not like this #tag1 tag2 tag3

I need a regex that will make sure that the first character after a space in the string is a #.

I have the check to make sure the first character is a # but that is as far as I have been able to get on this.

pattern: /^\#/

Upvotes: 2

Views: 403

Answers (1)

anubhava
anubhava

Reputation: 785058

You may use this regex:

^#[^#\s]*(?:\s#[^#\s]*)*$

RegEx Demo

RegEx Breakup:

  • ^: Start
  • #: Match a #
  • [^#\s]*: Match 0 or more of any characters that are not # and not a whitespace
  • (?:: Start non-capture group
    • \s: Match a whitespace
    • #: Match a #
    • [^#\s]*: Match 0 or more of any characters that are not # and not a whitespace
  • )*: End non-capture group
  • $: End

Upvotes: 2

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