string.sub looks like it only replaces the first instance. Is there an option for that or another method that can replace all patterns? Can you do it inside a regex like perl?
(I think something like r/blah/blah/)
... and +1 to anyone who can tell me WHY ON EARTH does string.sub replace just the FIRST match?
String.gsub should do the trick.
Quoting docs:
gsub(pattern, replacement) → new_strReturns a copy of str with the all occurrences of pattern substituted for the second argument. The pattern is typically a Regexp; if given as a String, any regular expression metacharacters it contains will be interpreted literally, e.g.
\\dwill match a backlash followed byd, instead of a digit.
I could explain why sub just replaces the first match of a pattern, but I think the documentation does it so much better (from ri String#sub on the command line):
str.sub(pattern, replacement) => new_str
str.sub(pattern) {|match| block } => new_str
Returns a copy of _str_ with the _first_ occurrence of _pattern_
replaced with either _replacement_ or the value of the block.