I have two arrays:
a = ["X2", "X3/X4", "X5/X6/X7", "X8/X9/X10/X11"]
b = ["X9/X10", "X3/X4"]
Now I need to select entries from 'a' array which regexp with any of entries from array 'b'.
Expected result is:
["X3/X4", "X8/X9/X10/X11"]
How can I do this in Ruby?
I'd do:
a.grep(Regexp.union(b))
# => ["X3/X4", "X8/X9/X10/X11"]
This should work:
a.grep(/#{b.join('|')}/)
# => ["X3/X4", "X8/X9/X10/X11"]
Try the below:
a = ["X2", "X3/X4", "X5/X6/X7", "X8/X9/X10/X11"]
b = ["X9/X10", "X3/X4"]
p a.select{|i| b.any?{|j| i.include? j }}
#>> ["X3/X4", "X8/X9/X10/X11"]
The safest way is to build a regular expression and then select elements of your array matching this expression:
Regexp.union("a", "b", "c")
# => /a|b|c/
Regexp.union(["a", "b", "c"])
# => /a|b|c/
("b".."e").to_a.grep(Regexp.union("a", "b", "c"))
# => ["b", "c"]
