正则表达式匹配单个名字字符串或首字母和姓氏字符串，一个空格和一个连字符

Question

Regular expression to match single first name string or first and last name string with one space and one hyphen.

Valid matches

1. Mathias d-arras
2. Martin Luther
3. Hector-Sausage
4. Mathias
5. John-Paul Mathias
6. Jhon S
7. K Jhon
8. k jhon-m
9. Jm k
10. k jm

Invalid matches

1. Mathias d arras
2. Mathias- darras
3. Hector -Sausage
4. Hector Sau K
5. Hector-Sau-K
6. Hector Sausage-
7. aa aa-a
8. aa aa a
9. Jean-Paul Simmons-Beckett
10. aa aa
11. aaa

Answer 1

Try this:

/^[a-z]+(?:-[a-z]+)?(?:\s[a-z]+(?:-[a-z]+)?)$/gim

DEMO

Answer 2

This pattern will correctly match the sample data that you provided (I'm assuming that you actually only want to allow spaces [ ], not all whitespaces [ \\s ], which would also include tabs, line breaks, etc):

/^[a-z]+( [a-z][a-z-]+||-[a-z]+)?$/i

Though, I wonder if there aren't some other situations that you've missed in your sample data, such as:

• John-Paul Mathias (valid, but would fail?)
• Hector Sausage- (invalid, but would pass?)

There would need to be some more tweaks to handle those, if they are needed.

Also, I left out the g and m flags, since this looks like a pattern validation, in which case, I wouldn't think you would need them. If you actually need to capture multiple instances of this pattern in a multi-line situation, then, you would need those flags put back in.

UPDATE

Okay, based on those other pieces of test data, the following regex will work:

/^[a-z]+-?[a-z]+( [a-z]+-?[a-z]+)?$/i

I keep feeling like there is a way to trim it down even more, but the complex relationship between the and - characters are making it difficult.

UPDATE #2:

Updated to match even more sample data. :D

/^[a-z]+(-[a-z]+)?( [a-z]+(-[a-z]+)?)?$/i

UPDATE #3:

Okay . . . one more update, for the new "one hyphen" requirement. :)

/^[a-z]+(-[a-z]+( [a-z]+)?||( [a-z]+)(-[a-z]+)?)?$/i

Answer 3

please try this pattern :

/^[a-z]+\s?[a-z]+\-?[a-z]+$/gim

ok , i updated it for you

DEMO :P