ruby regexp to replace equations

Question

I have a some HTML text in mathjax format:

text = \"an inline \\\\( f(x) = \\frac{a}{b} \\\\) equation, a display equation \\\\[ F = m a \\\\] \\n and anothe         


        

Answer 1

Not sure if your regexp is right - but in Ruby, Regexp are delimited by //, try like this :

desired = text.gsub(/(\\[)(.*?)(\\])/, "")

You were trying to do string substition, and of course gsub wasn't finding a string containing (\\[)(.*?)(\\])