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Rici Lake wrote:

On 25-Jan-06, at 2:17 PM, Brian Weed wrote:

Is there a library function for a reverse find

Sadly, no.

, or do I have to do it manually as in:

-- untested
i = 0
   i = i - 1
   p = string.find(s, ".", i, true)
while (p == nil and i ~= -string.len(s))

(I'm searching for the file extension, and there may be other dots in the filename)

A better way:

  local _, _, extension = string.find(s, ".*%.(.*)")

This works too:

local _, _, extension = string.find(s, "([^.]*)$")

Or perhaps string.find(s, "%.([^.]*)$") if you want to be sure that there is a dot in the input string.