;Global search and replace on a string
;
;input
;  s -       String to search and replace in
;  find -    String to find
;            "A scalar string that can contain one of two types of
;            information:
;
;            * One or more single characters, each of which is
;              considered to be a separator. String will be split
;              when any of the characters is detected. For example,
;              if [find] is " ," String will be split whenever
;              either a space or a comma is detected. In this case,
;              IDL performs a simple string search for the specified
;              characters. This method is simple and fast.
;            * If the REGEX keyword is specified, [find] is
;              considered to be a single regular expression (as
;              implemented by the STREGEX function). This method is
;              slower and more complex, but can handle extremely
;              complicated [find] strings.
;  replace - String to replace find with
;
;keyword input
;  /regex -  Passed along to strsplit, to control how find is interpreted
;
;return
;  copy of s, but each instance of find is replaced by replace.
;
function strrep,s,find,replace,regex=regex
  return,strjoin(strsplit(s,find,/extract,regex=regex),replace)
end