[Solved] What does ”-‘ mean in ^[A-Z]+[a-zA-Z”-‘\s]*$? [duplicate]

Question

When we leave out the other, well-understood parts of the character class, this remains: [''-'].

This construct has no use. It translates to “the character ' and the range from ' to '“, which is syntactically valid in regex but functionally equivalent to ['].

In the context of the annotated C# class property on the MSDN:

[RegularExpression(@"^[A-Z]+[a-zA-Z''-'\s]*$")]
public string Genre { get; set; }

it’s very likely simply a mistake by he tutorial author. The original intention is hard to guess. The following exactly the same thing.

[RegularExpression(@"^[A-Z]+[a-zA-Z'\s]*$")]
public string Genre { get; set; }

Accepted Answer

When we leave out the other, well-understood parts of the character class, this remains: [''-'].

This construct has no use. It translates to “the character ' and the range from ' to '“, which is syntactically valid in regex but functionally equivalent to ['].

In the context of the annotated C# class property on the MSDN:

[RegularExpression(@"^[A-Z]+[a-zA-Z''-'\s]*$")]
public string Genre { get; set; }

it’s very likely simply a mistake by he tutorial author. The original intention is hard to guess. The following exactly the same thing.

[RegularExpression(@"^[A-Z]+[a-zA-Z'\s]*$")]
public string Genre { get; set; }