Help with back references in regex

Ruby
1

Amatuer programmer here, just need some help inserting a * between a
coefficient and a variable to later be evaled. Need some help
referencing back to the (\d+) the number in front of a variable. Also
need to do this with )( inserting a * in between them. Any help would be
great.

equation = “5x”
if equation =~ /(\d+)x/
equation =equation.gsub((/(\d+)x/),(\1 + “*” + “x”))
end

2

On Thu, Jan 26, 2012 at 11:15 PM, Sathya L. [email protected]
wrote:

Amatuer programmer here, just need some help inserting a * between a
coefficient and a variable to later be evaled. Need some help
referencing back to the (\d+) the number in front of a variable. Also
need to do this with )( inserting a * in between them. Any help would be
great.

equation = “5x”
if equation =~ /(\d+)x/
equation =equation.gsub((/(\d+)x/),(\1 + “*” + “x”))

equation.gsub((/(\d+)x/), ‘\1*x’)