Convert an array of integers into an array of strings in Ruby?

Question

str_array = int_array.map(&:to_s)

str_array = int_array.collect{|i| i.to_s}

array.map(&:to_s) => array of integers into an array of strings

array.map(&:to_i) => array of strings into an array of integers

map and collect functions will work the same here.

int_array = [1, 2, 3]

str_array = int_array.map { |i| i.to_s }
=> str_array = ['1', '2', '3']

You can acheive this with one line:

array = [1, 2, 3]
array.map! { |i| i.to_s }

and you can use a really cool shortcut for proc: (https://stackoverflow.com/a/1961118/2257912)

array = [1, 2, 3]
array.map!(&:to_s)

Start up irb

irb(main):001:0> int_array = [11,12]
=> [11, 12]
irb(main):002:0> str_array = int_array.collect{|i| i.to_s}
=> ["11", "12"]

Your problem is probably somewhere else. Perhaps a scope confusion?