Regular expression for letters, spaces and hyphens





.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ height:90px;width:728px;box-sizing:border-box;
}







1















Looking for the regex to allow letters (either case), spaces and dashes for validation in ruby. Can't quite crack it.



As a starting point I'm using:



validates :name, format: { with: /A[a-zA-Z]+(?: [a-zA-Z]+)?z/, allow_blank: true}


Many thanks!






ruby regex







share|improve this question




















  • 3





    Welcome to SO. I suspect this question has been downvoted because it is unclear what you're asking for. I can recommend rubular.com as a resource, tho. You can use the key for parts of regexes in ruby (there are different flavours of regex in different language), and try it out for yourself.

    – AJFaraday
    Jan 4 at 13:51






  • 3





    /A[-A-Zs]+z/i would be enough.

    – Aleksei Matiushkin
    Jan 4 at 13:51








  • 3





    Also, is “λ” a letter? Is “я” a letter? Is “ä” a letter?

    – Aleksei Matiushkin
    Jan 4 at 13:52






  • 4





    If you need to support all Unicode letters, make sure - and spaces only appear between letters and no consecutive spaces/hyphens may occur (and there may be any amount of spaces/hyphens), use /Ap{L}+(?:[- ]p{L}+)*z/

    – Wiktor Stribiżew
    Jan 4 at 14:00








  • 1





    Of the answers and comments so far, only @Wiktor gets it right, because there is no requirement that whitespace be permitted, only spaces. Suppose str = "anb". Then str.match? /A[-A-Zs]+z/i #=> true, which is incorrect, whereas str.match? /Ap{L}+(?:[- ]p{L}+)*z/ #=> false. The former can be limited to spaces by simply changing s to a space. I see this mistake time and again.

    – Cary Swoveland
    Jan 4 at 17:53




















1















Looking for the regex to allow letters (either case), spaces and dashes for validation in ruby. Can't quite crack it.



As a starting point I'm using:



validates :name, format: { with: /A[a-zA-Z]+(?: [a-zA-Z]+)?z/, allow_blank: true}


Many thanks!






ruby regex







share|improve this question




















  • 3





    Welcome to SO. I suspect this question has been downvoted because it is unclear what you're asking for. I can recommend rubular.com as a resource, tho. You can use the key for parts of regexes in ruby (there are different flavours of regex in different language), and try it out for yourself.

    – AJFaraday
    Jan 4 at 13:51






  • 3





    /A[-A-Zs]+z/i would be enough.

    – Aleksei Matiushkin
    Jan 4 at 13:51








  • 3





    Also, is “λ” a letter? Is “я” a letter? Is “ä” a letter?

    – Aleksei Matiushkin
    Jan 4 at 13:52






  • 4





    If you need to support all Unicode letters, make sure - and spaces only appear between letters and no consecutive spaces/hyphens may occur (and there may be any amount of spaces/hyphens), use /Ap{L}+(?:[- ]p{L}+)*z/

    – Wiktor Stribiżew
    Jan 4 at 14:00








  • 1





    Of the answers and comments so far, only @Wiktor gets it right, because there is no requirement that whitespace be permitted, only spaces. Suppose str = "anb". Then str.match? /A[-A-Zs]+z/i #=> true, which is incorrect, whereas str.match? /Ap{L}+(?:[- ]p{L}+)*z/ #=> false. The former can be limited to spaces by simply changing s to a space. I see this mistake time and again.

    – Cary Swoveland
    Jan 4 at 17:53
















1












1








1








Looking for the regex to allow letters (either case), spaces and dashes for validation in ruby. Can't quite crack it.



As a starting point I'm using:



validates :name, format: { with: /A[a-zA-Z]+(?: [a-zA-Z]+)?z/, allow_blank: true}


Many thanks!






ruby regex







share|improve this question
















Looking for the regex to allow letters (either case), spaces and dashes for validation in ruby. Can't quite crack it.



As a starting point I'm using:



validates :name, format: { with: /A[a-zA-Z]+(?: [a-zA-Z]+)?z/, allow_blank: true}


Many thanks!






ruby regex




ruby regex






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Jan 4 at 13:50









Aleksei Matiushkin

84.9k95896




84.9k95896










asked Jan 4 at 13:47









bidgeeboybidgeeboy

132




132








  • 3





    Welcome to SO. I suspect this question has been downvoted because it is unclear what you're asking for. I can recommend rubular.com as a resource, tho. You can use the key for parts of regexes in ruby (there are different flavours of regex in different language), and try it out for yourself.

    – AJFaraday
    Jan 4 at 13:51






  • 3





    /A[-A-Zs]+z/i would be enough.

    – Aleksei Matiushkin
    Jan 4 at 13:51








  • 3





    Also, is “λ” a letter? Is “я” a letter? Is “ä” a letter?

    – Aleksei Matiushkin
    Jan 4 at 13:52






  • 4





    If you need to support all Unicode letters, make sure - and spaces only appear between letters and no consecutive spaces/hyphens may occur (and there may be any amount of spaces/hyphens), use /Ap{L}+(?:[- ]p{L}+)*z/

    – Wiktor Stribiżew
    Jan 4 at 14:00








  • 1





    Of the answers and comments so far, only @Wiktor gets it right, because there is no requirement that whitespace be permitted, only spaces. Suppose str = "anb". Then str.match? /A[-A-Zs]+z/i #=> true, which is incorrect, whereas str.match? /Ap{L}+(?:[- ]p{L}+)*z/ #=> false. The former can be limited to spaces by simply changing s to a space. I see this mistake time and again.

    – Cary Swoveland
    Jan 4 at 17:53
















  • 3





    Welcome to SO. I suspect this question has been downvoted because it is unclear what you're asking for. I can recommend rubular.com as a resource, tho. You can use the key for parts of regexes in ruby (there are different flavours of regex in different language), and try it out for yourself.

    – AJFaraday
    Jan 4 at 13:51






  • 3





    /A[-A-Zs]+z/i would be enough.

    – Aleksei Matiushkin
    Jan 4 at 13:51








  • 3





    Also, is “λ” a letter? Is “я” a letter? Is “ä” a letter?

    – Aleksei Matiushkin
    Jan 4 at 13:52






  • 4





    If you need to support all Unicode letters, make sure - and spaces only appear between letters and no consecutive spaces/hyphens may occur (and there may be any amount of spaces/hyphens), use /Ap{L}+(?:[- ]p{L}+)*z/

    – Wiktor Stribiżew
    Jan 4 at 14:00








  • 1





    Of the answers and comments so far, only @Wiktor gets it right, because there is no requirement that whitespace be permitted, only spaces. Suppose str = "anb". Then str.match? /A[-A-Zs]+z/i #=> true, which is incorrect, whereas str.match? /Ap{L}+(?:[- ]p{L}+)*z/ #=> false. The former can be limited to spaces by simply changing s to a space. I see this mistake time and again.

    – Cary Swoveland
    Jan 4 at 17:53










3




3





Welcome to SO. I suspect this question has been downvoted because it is unclear what you're asking for. I can recommend rubular.com as a resource, tho. You can use the key for parts of regexes in ruby (there are different flavours of regex in different language), and try it out for yourself.

– AJFaraday
Jan 4 at 13:51





Welcome to SO. I suspect this question has been downvoted because it is unclear what you're asking for. I can recommend rubular.com as a resource, tho. You can use the key for parts of regexes in ruby (there are different flavours of regex in different language), and try it out for yourself.

– AJFaraday
Jan 4 at 13:51




3




3





/A[-A-Zs]+z/i would be enough.

– Aleksei Matiushkin
Jan 4 at 13:51







/A[-A-Zs]+z/i would be enough.

– Aleksei Matiushkin
Jan 4 at 13:51






3




3





Also, is “λ” a letter? Is “я” a letter? Is “ä” a letter?

– Aleksei Matiushkin
Jan 4 at 13:52





Also, is “λ” a letter? Is “я” a letter? Is “ä” a letter?

– Aleksei Matiushkin
Jan 4 at 13:52




4




4





If you need to support all Unicode letters, make sure - and spaces only appear between letters and no consecutive spaces/hyphens may occur (and there may be any amount of spaces/hyphens), use /Ap{L}+(?:[- ]p{L}+)*z/

– Wiktor Stribiżew
Jan 4 at 14:00







If you need to support all Unicode letters, make sure - and spaces only appear between letters and no consecutive spaces/hyphens may occur (and there may be any amount of spaces/hyphens), use /Ap{L}+(?:[- ]p{L}+)*z/

– Wiktor Stribiżew
Jan 4 at 14:00






1




1





Of the answers and comments so far, only @Wiktor gets it right, because there is no requirement that whitespace be permitted, only spaces. Suppose str = "anb". Then str.match? /A[-A-Zs]+z/i #=> true, which is incorrect, whereas str.match? /Ap{L}+(?:[- ]p{L}+)*z/ #=> false. The former can be limited to spaces by simply changing s to a space. I see this mistake time and again.

– Cary Swoveland
Jan 4 at 17:53







Of the answers and comments so far, only @Wiktor gets it right, because there is no requirement that whitespace be permitted, only spaces. Suppose str = "anb". Then str.match? /A[-A-Zs]+z/i #=> true, which is incorrect, whereas str.match? /Ap{L}+(?:[- ]p{L}+)*z/ #=> false. The former can be limited to spaces by simply changing s to a space. I see this mistake time and again.

– Cary Swoveland
Jan 4 at 17:53














1 Answer
1






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0














This regex will allow letters, spaces and hyphens: /^[A-Za-zs-]+$/






share|improve this answer





















  • 1





    Careful, ^ and $ are beginning/ending of line in Ruby, not string. You almost always want A and z instead.

    – mu is too short
    Jan 4 at 19:30












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1 Answer
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This regex will allow letters, spaces and hyphens: /^[A-Za-zs-]+$/






share|improve this answer





















  • 1





    Careful, ^ and $ are beginning/ending of line in Ruby, not string. You almost always want A and z instead.

    – mu is too short
    Jan 4 at 19:30
















0














This regex will allow letters, spaces and hyphens: /^[A-Za-zs-]+$/






share|improve this answer





















  • 1





    Careful, ^ and $ are beginning/ending of line in Ruby, not string. You almost always want A and z instead.

    – mu is too short
    Jan 4 at 19:30














0












0








0







This regex will allow letters, spaces and hyphens: /^[A-Za-zs-]+$/






share|improve this answer















This regex will allow letters, spaces and hyphens: /^[A-Za-zs-]+$/







share|improve this answer














share|improve this answer



share|improve this answer








edited Jan 4 at 16:34









Michael Pratt

2,4871126




2,4871126










answered Jan 4 at 16:02









MukeshMukesh

782719




782719








  • 1





    Careful, ^ and $ are beginning/ending of line in Ruby, not string. You almost always want A and z instead.

    – mu is too short
    Jan 4 at 19:30














  • 1





    Careful, ^ and $ are beginning/ending of line in Ruby, not string. You almost always want A and z instead.

    – mu is too short
    Jan 4 at 19:30








1




1





Careful, ^ and $ are beginning/ending of line in Ruby, not string. You almost always want A and z instead.

– mu is too short
Jan 4 at 19:30





Careful, ^ and $ are beginning/ending of line in Ruby, not string. You almost always want A and z instead.

– mu is too short
Jan 4 at 19:30




















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