trim() and split() functions I use in other lua scripts

tobarja/split.lua

+-- the python-like example from http://lua-users.org/wiki/SplitJoin
+function string:split(sSeparator, nMax, bRegexp)
+	assert(sSeparator ~= '')
+	assert(nMax == nil or nMax >= 1)
+
+	local aRecord = {}
+
+	if self:len() > 0 then
+		local bPlain = not bRegexp
+		nMax = nMax or -1
+
+		local nField=1 nStart=1
+		local nFirst,nLast = self:find(sSeparator, nStart, bPlain)
+		while nFirst and nMax ~= 0 do
+			aRecord[nField] = self:sub(nStart, nFirst-1)
+			nField = nField+1
+			nStart = nLast+1
+			nFirst,nLast = self:find(sSeparator, nStart, bPlain)
+			nMax = nMax-1
+		end
+		aRecord[nField] = self:sub(nStart)
+	end
+
+	return aRecord
+end

tobarja/trim.lua

+-- trim9 from http://lua-users.org/wiki/StringTrim
+local _util_lib_find = string.find
+local _util_lib_sub = string.sub
+function trim(s)
+  local _,i1 = _util_lib_find(s,'^%s*')
+  local i2 = _util_lib_find(s,'%s*$')
+  return _util_lib_sub(s,i1+1,i2-1)
+end