Escape sequences for } { and $ in gsub

ruby-talk
1

I've found an older thread regarding escape sequences and gsub - but I
did not understand all of the explanation. I am trying to replace the
following string portion

\$\symbol{92}

with

$

and from the older thread it looks as if something like the following
is required:

gsub!(/\\$$\\symbol{{92}}/,'$')

after about three hours of fiddling with the above expression the best
I've obtained has been with

gsub!(/\\symbol{92/,'$')

but this does not solve the substitution problem. I must be using the
wrong escape sequence for $ and }.

Does anyone have any recommendations or pointers to documentation on
escape sequences and gsub? Thank you in advance for your advice.

best regards, James Cunningham

2

james Cunningham wrote:
> I've found an older thread regarding escape sequences and gsub - but I
> did not understand all of the explanation. I am trying to replace the
> following string portion
>
> \$\symbol{92}
>
> with
>
> $
>

is this what you need?

b = "WWWW\\$\\symbol{92}KKKK"
puts b.gsub(/\\\$\\symbol\{92\}/, '$')

>WWWW$KKKK

just escape the
    \
    $
    {
    }

with a \ each.

or, don't use regular expressions:

puts b.gsub('\\$\\symbol{92}', '$')

hope this helps
-ramil