List comprehension in Ruby
list-comprehension, ruby
Solution
If you really want to, you can create an Array#comprehend method like this:
class Array
def comprehend(&block)
return self if block.nil?
self.collect(&block).compact
end
end
some_array = [1, 2, 3, 4, 5, 6]
new_array = some_array.comprehend {|x| x * 3 if x % 2 == 0}
puts new_array
Prints:
6
12
18
I would probably just do it the way you did though.
Problem
To do the equivalent of Python list comprehensions, I'm doing the following: ``` some_array.select{|x| x % 2 == 0 }.collect{|x| x * 3} ``` Is there a better way to do this...perhaps with one method call?