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Comment by ez77 | Hacker News Reader

A bit off topic, please consider the following example in [1]:

  if ($args ~ post=140){
    rewrite ^ http://example.com/ permanent;
  }

Why is "^" used as a regex wildcard instead of ".*"? Thanks!

I think that regex matches any string as well - ^ simply matches the start of a line and all strings have a start.

It might also be more performant because the regex engine doesn't consume the whole string before finding a match..

That is exactly right. See "Taxing Rewrites" on http://wiki.nginx.org/Pitfalls

In Soviet Russia, regex starts you.