Dereferencing variables within ruby regex

Question

I am having trouble figuring this one out. I need to be able to dereference an integer variable in ruby within a regex. So, for example, lets say I have a string called this_string, and I want to insert a space every 8 characters, this would work:

this_string.scan(/.{8}|.+/).join(" ")

But how do I do this every N characters using a regex, where N is an arbitrary integer?

DigitalRoss · Accepted Answer · 2011-06-05 02:37:04Z

2

n = 3
s.scan(Regexp.new ".{#{n}}|.+").join ' '

answered Jun 5, 2011 at 2:37

DigitalRoss

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