Ruby separating an array of strings by checking whether or not the object inherits from a certain class -

• I have a string in which I read a file from x
• I have an empty array y
• some string objects are integer
• how can I separate the integers with strings, special forms I'm still trying to call to_a

with

  x.each do | S | If s.to_i.is_a? (Integer) y & lt; & Lt;  

But it just changes everything in an integer and puts it in y , there is a way to see that an object is actually in the integer class ?

Add sample input / output

  x = ["this", "is", "one", "random" "", "Key", "ka", "number", "111113087403957304739703975", "how", "can", "me", "read", "combination", "ka", "text", " And "," a "", "in this."] Y = [111113087403957304739703975]  

< Pre> x.each do | s begin the integer Logic Argument arguments yy

If a string is applied that does not parse as integer , Then integer () a argumentErro R . You can use it to find the integer string.