Changing text based on the final letter of user name

问题

In my system, users will register their names. In the natural language the system is used with, names end differently depending its use, such as:

• who: "name surname"
• with who: "namai surnamai"

Due to this, I need to change the ending of @provider_user.name in some places; if it ends with e, replace e with ai.

My HTML slim code is:

= render partial: 'services/partials/messages/original_message', locals: { header: t('html.text.consultation_with.for_provider', name: @provider_user.name)

It takes text from a yml file and uses @provider_user.name.

Any suggestions to work this around?

回答1:

Try this, simple single line code

@provider_user.name.split.map {|w| (w.end_with?('e') ? (w.chomp(w[w.length - 1]) + 'ai') : w) }.join(" ")

I am sure, it will convert "name surname" to "namai surnamai".

In additional cases...

@provider_user.name.split.map {|w| (w.end_with?('e') ? (w.chomp(w[w.length - 1]) + 'ai') : (w.end_with?('us') ? (w.chomp(w[w.length - 1]) + 'mi') : (w.end_with?('i') ? (w.chomp(w[w.length - 1]) + 'as') : w))) }.join(" ")

回答2:

"name surname".gsub(/e\b/, 'ai') # "namai surnamai"

.gsub uses a regular expression to search and replace in a string. Its the greedy version of .sub meaning that it will replace all occurrences.

\b matches any word boundry.

回答3:

It's really easy, that's why I love Ruby...

class String
    def replace_ends(replace, with) 
        end_array = self.split " "
        end_array.map! do |var|
            break unless var.end_with? replace
            var.chomp(" ").chomp(replace) + with
        end
        return end_array.join " "
    end
end

来源：https://stackoverflow.com/questions/53595868/changing-text-based-on-the-final-letter-of-user-name