Returning a specific string format from an array

Question

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"[email protected]    #will not work as I want 
end

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

In what class did you try to define this to_s?

mechnicov
– mechnicov

2022-03-21 12:59:36 +00:00
Commented Mar 21, 2022 at 12:59 — mechnicov
– mechnicov, Commented Mar 21, 2022 at 12:59

Yakov · Accepted Answer · 2022-03-21 12:28:34Z

2

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(',')

answered Mar 21, 2022 at 12:28

Yakov

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Comments

Hardik Upadhyay · Accepted Answer · 2022-03-21 12:12:19Z

-1

Try this,

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

For more info check Interpolation

answered Mar 21, 2022 at 12:12

Hardik Upadhyay

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