Home / Questions / 161628
Accepted
Brian_Alexander
Asked: 2020-05-05 09:25:03 +0800 CST 2020-05-05 09:25:03 +0800 CST

How do I create an array from my array, that with .select create an array with the elements that start with the letter p?

  • 772

I have the following array:

nombres = ["Violeta", "Andino", "Clemente", "Javiera", "Paula", "Pia", "Ray"]
a = nombres.select{ |ele|}

I would like to know what would be the instruction to create aa arraydifferent variable in the variable that contains only the elements that begin with the letter P .

ruby

1 Answers

  1. Best Answer

    You can use the method start_with?together with select:

    a = nombres.select { |nombre| nombre.start_with?("P") }
#=> ["Paula", "Pia"]

    If you want it to ignore whether it's uppercase or lowercase, you could convert everything to lowercase (or uppercase) first; for instance:

    a = nombres.select { |nombre| nombre.dwoncase.start_with?("p") }
#=> ["Paula", "Pia"]

    Or you could also use regexp :

    a = nombres.select { |nombre| nombre.match?(/^p/i) }
#=> ["Paula", "Pia"]
    • 1