I have a string like this “HelloWorldMyNameIsCarl” and I want it to become something like “Hello_World_My_Name_Is_Carl”. How can I do this?
I have a string like this HelloWorldMyNameIsCarl and I want it to become something
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I have a string like this “HelloWorldMyNameIsCarl” and I want it to become something like “Hello_World_My_Name_Is_Carl”. How can I do this?
Yes, regular expressions can do that for you:
The expression
[A-Z]will match every upper case letter and put it into the second group. You need the first group.to avoid replacing the first ‘H’.As Piligrim pointed out, this solution does not work for arbitrary languages. To catch any uppercase letter defined by the Unicode stardard we need the Unicode 4.1 subproperty
\p{Lu}which matches all uppercase letters. So the more general solution looks likeThanks Piligrim.