CODEWITHSUNDEEP
javascriptregex
user7122093
user7122093

Reputation:

Regex to match specific phrase finished or not with exclamation mark?

I want to match a specific phrase finished or not with exclamation mark.

I made this regex that should match only Lorem Ipsum and Lorem Ipsum!:

/(?:Lorem Ipsum|Lorem Ipsum!)\b/

but it doesn't work with Lorem Ipsum! (with exclamation mark).

EDIT: It should match only with Lorem Ipsum and nothing else or Lorem Ipsum! and nothing else, I mean it shouldn't match with Lorem Ipsum!eeeee

Upvotes: 0

Views: 1169

Answers (4)

ibrahim mahrir
ibrahim mahrir

Reputation: 31712

Use this: 

/Lorem Ipsum!?(?=\s|$)/g

it uses a lookahead to check if the character following the last character (! or m) is either a space \s or the end of the line $.

Note 1: Add the g to match all occurences, and the i modifier to ignore the case.

Regex101 example.

Upvotes: 1

tripleee
tripleee

Reputation: 189739

The reason /prefix|prefix with suffix/ doesn't work is that most regex engines prefer the leftmost match in an alternation. Simply reordering it should work.

However, as others have suggested, making just the exclamation mark optional is a hugely more readable solution.

/Lorem Ipsum!?$/

Since you apparently genuinely want to anchor to end of line, you should use $ at the end rather than \b.

Upvotes: 0

Leyre
Leyre

Reputation: 11

Try with:

/lorem ipsum[!]?/

You can find a cheatsheet for regex and test them on: http://www.regexr.com

Upvotes: 1

lute
lute

Reputation: 402

How about this:

/Lorem Ipsum!?\b/

Upvotes: 0

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