API - useful for checking if an array contains a value
return function
local msg1 = 'a.ab';
local msg2 = 'aa.a';
local pattern =(?<=[a-zA-Z0-9#%-_+=])([.])(?=[a-zA-Z]{2,})';
--the pattern first checks for a letter or number before a period
--then checks for two consecutive letters after a period
local match1 = helper.matchRegex(pattern , msg1);
local match2 = helper.matchRegex(pattern , msg2);
log(match1); --true
log(match2); --false
end
