You can use single quotes when assigning the string to avoid interpolation and express #{} literally:

my_template = 'This will contain my #{string}'
# => "This will contain my \#{string}"

Or alternatively you can use double quotes and escape the # symbol with a slash (as seen in the return value of the statement above).

There's also another interpolation technique described here which may be helpful:

greeting = 'hello %s, my name is %s!'
interpolated = greeting % ['Mike', 'John']
# => "hello Mike, my name is John!"

Then you can detect %s with your regex, but still retain the ability to interpolate easily & use the string as a template.

Description

#\{([^}]*)\}

_{** To see the image better, simply right click the image and select view in new window}

This regular expression will do the following:

• Matches substrings surrounded by #{....} structure
• Captures the substring inside the brackets into Capture Group 1
• Does not work recursively

Example

Live Demo

https://regex101.com/r/vR6mU9/1

Sample text

This will contain my #{string}

Sample Matches

MATCH 1
Capture group 0: #{string}
Capture group 1: `string`

Explanation

NODE                     EXPLANATION
----------------------------------------------------------------------
  #                        '#'
----------------------------------------------------------------------
  \{                       '{'
----------------------------------------------------------------------
  (                        group and capture to \1:
----------------------------------------------------------------------
    [^}]*                    any character except: '}' (0 or more
                             times (matching the most amount
                             possible))
----------------------------------------------------------------------
  )                        end of \1
----------------------------------------------------------------------
  \}                       '}'
----------------------------------------------------------------------