Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
params[:hello] # => "Some params value"
hello = params[:hello]
hello.gsub!("whatever","")
params[:hello] # => ""
I don’t understand, can someone please explain why the params[:hello] gets modified by the gsub! ? I expected the hello string to be modified, but not the params hash.
helloandparams[:hello]are references to the same string. In ruby (as in java and python among others) assignment does not copy the value, it just stores another reference to the same value in the assigned-to variable. So unless you explicitly copy the string before modifying it (usingdup) any changes to the string will affect all other references to the string.