CODEWITHSUNDEEP
regexstring
Madhuri Bhamre
Madhuri Bhamre

Reputation: 25

remove long hashtags trail from string

I want regular expression which will remove hashtags at the end of a string. For example:

*WCW * $14 black vans (size 6)* $8 black fishnet Jacket (size large)* $6 giraffe tank top (size small)* $8 denim shorts (size 2)* $6 red see through purse #platosclosetmooresville #platosclosetlakenorman #resale #gentlyused #preloved #lakenorman #mooresville #MVL #LKN #fashionista #recycleyourstyle #cornelius #davidson #concord #kannapolis #statesville #salisbury #bargainista #lknshopping #mooresvilleshopping #GetCash #SellYourItems #shopping #BargainShopper #ShopLocal #PlatosCloset #giraffe #OOTD #WCW

I have written a regular expression to match the hashtag trail. /#[#\w\s]*\z/. also tried with /#[#\w\s]*$/u. But they only return

#lknshopping #mooresvilleshopping #GetCash #SellYourItems #shopping #BargainShopper #ShopLocal #PlatosCloset #giraffe #OOTD #WCW

It should capture all of:

#platosclosetmooresville #platosclosetlakenorman #resale #gentlyused #preloved #lakenorman #mooresville #MVL #LKN #fashionista #recycleyourstyle #cornelius #davidson #concord #kannapolis #statesville #salisbury #bargainista #lknshopping #mooresvilleshopping #GetCash #SellYourItems #shopping #BargainShopper #ShopLocal #PlatosCloset #giraffe #OOTD #WCW

The solution should not match hashtags in the middle of the string.

Upvotes: 0

Views: 59

Answers (2)

The fourth bird
The fourth bird

Reputation: 163467

The regex #[#\w\s]*\z starts at matching a # and is followed by a character class which will match one out of several characters. That character class is repeated zero or more times so it would for example also match ###a bc or just the single starting #

If you want to match hashtags that are as a trail of a sentence and there can not be a word that is not a hashtag in between you could use:

#\w+(?:\s+#\w+)*\z

Regex demo

Explanation

  • # Match literally
  • \w+ Match one or more times a word character
  • (?: Non capturing group
    • \s+#\w+ match one or more times a whitespace character followed by # and match one or more times a word character
  • )* Close non capturing group and repeat zero or more times
  • \z Assert end of the string

Upvotes: 1

lucas_7_94
lucas_7_94

Reputation: 324

i'm not sure if you want to each hashtag string:

  • (without #): (?<=#)[[:alpha:]]* check this
  • (with #): #[a-zA-Z]+ check this

Upvotes: 0

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