From: Joel VanderWerf <vjoel@...>
Date: 2003-09-28T02:34:02+09:00
Subject: Re: regexp needed to split letters from numbers

Martin DeMello wrote:
> Thomas A. Reilly <w3gat@bellsouth.net> wrote:
> 
>>I would appreciate it if someone could give me the regexp that it would 
>>split the following:
>>for example -
>>"clonidine300 mg"  into "clonidine 300 mg"
>>
>>I have a bunch of drug data where the dose had been typed together.
> 
> 
> Are you likely to have numbers in the drug's name? Don't forget to
> include that as a test case if so. The following puts a space before the
> string of digits immediately preceding " mg" if it doesn't already have
> one:
> 
> sub(/(\w)(\d+ mg)/, "#{$1} #{$2}")
> 
> martin

Another way to do it:

irb(main):001:0> s = "clonidine300 mg"
=> "clonidine300 mg"
irb(main):002:0> s[/(?=\d+ mg)/] = " "
=> " "
irb(main):003:0> s
=> "clonidine 300 mg"
irb(main):004:0>