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

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

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#1 by (1 votes)

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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 in the variable a a array different that contains only the elements that begin with the letter P .

ruby

asked by Upset Grade 04.05.2018 в 19:25

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1 answer

The url in Django is superimposed Error using PDO [closed]

score 1 · Accepted Answer

You can use the start_with? method together with select :

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

If you want to ignore if it is uppercase or lowercase, you could convert everything to lowercase (or uppercase) first; for example:

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"]