# Using a variable with gsub & sub **URL:** \ **Category:** ruby-talk\ **Created:** [15 November 2007 21:34 UTC](https://rubytalk.org/t/using-a-variable-with-gsub-sub/42233 "2007-11-15T21:34:16Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Peter\_Vanderhaden](https://avatars.discourse-cdn.com/v4/letter/p/74df32/32.png) [@Peter\_Vanderhaden](https://rubytalk.org/u/Peter_Vanderhaden)\ **Post date:** [15 November 2007 21:34 UTC](https://rubytalk.org/t/using-a-variable-with-gsub-sub/42233/1 "2007-11-15T21:34:16Z")
In the following statement, I'm replacing , with ,NULL,. $inrec = $inrec.sub(',\\',',NULL,') What I want to do is something like this: $inrec = $inrec.sub(',\\',',$variable,') Unfortunately, I haven't been able to figure out the syntax for using a variable with sub & gsub. Can someone help me out? Thanks. > **···** > > -- > Posted via [http://www.ruby-forum.com/](http://www.ruby-forum.com/). ---
**Author:** ![yermej](https://avatars.discourse-cdn.com/v4/letter/y/b2d939/32.png) [@yermej](https://rubytalk.org/u/yermej)\ **Post date:** [15 November 2007 22:00 UTC](https://rubytalk.org/t/using-a-variable-with-gsub-sub/42233/2 "2007-11-15T22:00:06Z")
$inrec.gsub! ',\\', ",#{$variable}," Though I'm not sure why you have the \\ in there, unless it just didn't end up on the newsgroup correctly. > **···** > > On Nov 15, 3:34 pm, Peter Vanderhaden \ wrote: > > > In the following statement, I'm replacing , with ,NULL,. > > > > $inrec = $inrec.sub(',\\',',NULL,') > > > > What I want to do is something like this: > > > > $inrec = $inrec.sub(',\\',',$variable,') > > > > Unfortunately, I haven't been able to figure out the syntax for using a > > variable with sub & gsub. Can someone help me out? ---
**Author:** ![Benjamin\_A\_Lee](https://avatars.discourse-cdn.com/v4/letter/b/4bbf92/32.png) [@Benjamin\_A\_Lee](https://rubytalk.org/u/Benjamin_A_Lee)\ **Post date:** [15 November 2007 22:16 UTC](https://rubytalk.org/t/using-a-variable-with-gsub-sub/42233/3 "2007-11-15T22:16:33Z")
The replacement is simply a string, so you could do:   $inrec = $inrec.sub(',\\',','+$variable+',') or   $inrec = $inrec.sub(',\\',',#{$variable},') > **···** > > On Fri, Nov 16, 2007 at 06:34:16AM +0900, Peter Vanderhaden wrote: > > > In the following statement, I'm replacing , with ,NULL,. > > > > $inrec = $inrec.sub(',\\',',NULL,') > > > > What I want to do is something like this: > > > > $inrec = $inrec.sub(',\\',',$variable,') > > > > Unfortunately, I haven't been able to figure out the syntax for using a > > variable with sub & gsub. Can someone help me out? > > Thanks. > > -- > Benjamin A'Lee :: benjamin.alee@subvert.org.uk > Subvert Technologies :: [http://subvert.org.uk/](http://subvert.org.uk/) ---
**Author:** ![Harry3](https://avatars.discourse-cdn.com/v4/letter/h/54ee81/32.png) [@Harry3](https://rubytalk.org/u/Harry3)\ **Post date:** [16 November 2007 01:15 UTC](https://rubytalk.org/t/using-a-variable-with-gsub-sub/42233/4 "2007-11-16T01:15:14Z")
Try this. ",#{var}," Harry > **···** > > On Nov 16, 2007 6:34 AM, Peter Vanderhaden \ wrote: > > > What I want to do is something like this: > > > > $inrec = $inrec.sub(',\\',',$variable,') > > > > Unfortunately, I haven't been able to figure out the syntax for using a > > variable with sub & gsub. Can someone help me out? > > -- > A Look into Japanese Ruby List in English > > > **[Kakueki.com is for sale | HugeDomains](https://www.hugedomains.com/domain_profile.cfm?d=kakueki.com)** > > > > Start using this domain right away. Straightforward domain shopping experience. Quick access to your domain. ---
**Author:** ![Peter\_Vanderhaden](https://avatars.discourse-cdn.com/v4/letter/p/74df32/32.png) [@Peter\_Vanderhaden](https://rubytalk.org/u/Peter_Vanderhaden)\ **Post date:** [16 November 2007 01:24 UTC](https://rubytalk.org/t/using-a-variable-with-gsub-sub/42233/5 "2007-11-16T01:24:17Z")
yermej, Your solution was exactly what I needed, thanks. As for the \\, that is part of the first value that is being replaced. The first backslash is an escape character for the second backshash. Thanks again, PETERV yermej wrote: > **···** > > > On Nov 15, 3:34 pm, Peter Vanderhaden \ wrote: > > > > > In the following statement, I'm replacing , with ,NULL,. > > > > > > $inrec = $inrec.sub(',\\',',NULL,') > > > > > > What I want to do is something like this: > > > > > > $inrec = $inrec.sub(',\\',',$variable,') > > > > > > Unfortunately, I haven't been able to figure out the syntax for using a > > > variable with sub & gsub. Can someone help me out? > > > > $inrec.gsub! ',\\', ",#{$variable}," > > > > Though I'm not sure why you have the \\ in there, unless it just > > didn't end up on the newsgroup correctly. > > -- > Posted via [http://www.ruby-forum.com/\](http://www.ruby-forum.com/%5C). ---
**Author:** ![Justin\_Collins](https://avatars.discourse-cdn.com/v4/letter/j/3e96dc/32.png) [@Justin\_Collins](https://rubytalk.org/u/Justin_Collins)\ **Post date:** [16 November 2007 02:14 UTC](https://rubytalk.org/t/using-a-variable-with-gsub-sub/42233/6 "2007-11-16T02:14:00Z")
Peter Vanderhaden wrote: > yermej, > Your solution was exactly what I needed, thanks. As for the \\, that is part of the first value that is being replaced. The first backslash is an escape character for the second backshash. > Thanks again, > PETERV > > yermej wrote: >    > > > > In the following statement, I'm replacing , with ,NULL,. > > > > > > $inrec = $inrec.sub(',\\',',NULL,') > > > > > > What I want to do is something like this: > > > > > > $inrec = $inrec.sub(',\\',',$variable,') > > > > > > Unfortunately, I haven't been able to figure out the syntax for using a > > > variable with sub & gsub. Can someone help me out? > > >        > > > > $inrec.gsub! ',\\', ",#{$variable}," > > > > Though I'm not sure why you have the \\ in there, unless it just > > didn't end up on the newsgroup correctly. > >      If you really want to use global variables ($var) then you can also do $inrec.gsub!(',\\', ",#$variable,") > **···** > > > > On Nov 15, 3:34 pm, Peter Vanderhaden \ wrote: