Question

I have a requirement to write a regex to validate a text entry. The text must be between 5 and 16 characters (a-Z plus hyphen, underscore and space). This is fine but it must also check that there are not any consecutive spaces.

e.g.

hello        // PASS
hello there  // PASS
hi there you // PASS
hello  there // FAIL - two spaces between hello and there

Answer 1

你们可以使用这样的东西:

/^(?!.*  )[-a-z_ ]{5,16}z/i

Answer 2

Java 我会同意我的看法。

"  |[^\p{L}_ -]"

(" isn t part of the regex). If the string matches this regex then it fails. I would check the size separately in an if sentence (faster that way).

如果没有统法协会的特性,如果你想用某种语言这样做:

ss|[^A-Za-z_ -]

Answer 3

Regex:

^([w-_]+([s]{0,1})[w-_]+)$

匹配

hello
hello there
hi there
he-llo
he_las test

http://www.ohchr.org。

hello  there
hello     there

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