Converting string from snake_case to CamelCase in Ruby

Question

I am trying to convert a name from snake case to camel case. Are there any built-in methods?

Eg: \"app_user\" to \"AppUser\"

(I hav

Answer 1

Most of the other methods listed here are Rails specific. If you want do do this with pure Ruby, the following is the most concise way I've come up with (thanks to @ulysse-bn for the suggested improvement)

x="this_should_be_camel_case"
x.gsub(/(?:_|^)(\w)/){$1.upcase}
    #=> "ThisShouldBeCamelCase"