Online Lower Case Converter

I wrote the below code to convert a csv to lower case.

(Get-Content "$file" -Raw).ToLower() | Out-File "$outfile"

But Getting error like :

Get-Content : A parameter cannot be found that matches parameter name 'Raw'.

I am new in regular expression. I want to remove a uppercase letter if it has lowercase before and after it. If the input is "I wilYl go theXre" then the output should be "I will go there". How can I get it?

I have to rename a complete folder tree recursively so that no uppercase letter appears anywhere (it's C++ source code, but that shouldn't matter).

Bonus points for ignoring CVS and Subversion version control files/folders. The preferred way would be a shell script, since a shell should be available on any Linux box.

There were some valid arguments about details of the file renaming.

1. I think files with the same lowercase names should be overwritten; it's the user's problem. When checked out on a case-ignoring file system, it would overwrite the first one with the latter, too.

2. I would consider A-Z characters and transform them to a-z, everything else is just calling for problems (at least with source code).

3. The script would be needed to run a build on a Linux system, so I think changes to CVS or Subversion version control files should be omitted. After all, it's just a scratch checkout. Maybe an "export" is more appropriate.

What is an easy way in Golang to check if all characters in a string are upper case or lower case?

Also, how to handle a case where the string has punctuation?

See these examples:

package mainimport (    "fmt"    "unicode")func main() {    s := "UPPERCASE"    fmt.Println(s.IsUpper())  // Should print true    s = "lowercase"    fmt.Println(s.IsUpper())  // Should print false    s = "lowercase"    fmt.Println(s.IsLower())  // Should print true    s = "I'M YELLING AT YOU!"    fmt.Println(s.IsUpper())  // Should print true}

Note: s.IsUpper() and s.IsLower() doesn't really exist, but would be nice to find an equivalent.

How can I convert all values in an array to lowercase in PHP?

Something like array_change_key_case?