Returning a specific string format from an array-CodePudding

I have an array of Persons (class contain name and lastname and id ) what I have to do is to return a string form this array but in a specific format an example will be more explicative

array=[PERS1,PERS2]

I need this as a return value : "The name of all persons : " PERS1.name PERS1.LASTN " , " PERS2.name PERS2.LASTN ","

I know this method

 array.each{ |per|

                #but this will not return  the format ,and with each I think I can only    print (I'm new in the ruby field
                }

all of this because I need it when overriding to_s , because I need to provide a string -> to_s

def to_s

    "THE name of all preson" @array.each    #will not work as I want 
end

Thank you for ur time and effort and if you need any clarification please let me know

CodePudding user response：

Try this,

array.each do |per|
 "#{per.name} #{per.LASTN}"
end

For more info check Interpolation

CodePudding user response：

each just iterates over a collection and returns the collection itself. You may want to use map and join the result.

array.map { |person| "#{person.name} #{person.lastn}" }.join(',')

Or if you modify your Person class it can be even simpler.

# I assume that the name of the class is Person and name and lastn are always present
class Person
  def full_name
    "#{person.name} #{person.lastname}"
  end
end

# Then you can call this method on `map`.
array.map(&:full_name).join(',')