Print( "string.find( str, 'lua') : ", string.find( str, 'lua'))
Print( "string.find( str, 'pl') : ", string.find( str, 'pl'))
– -: This is a lazy match which matched 0 or more occurrences of previous character class. ?: This is a match exactly which matches 0 or 1 occurrence of previous character class. *: This is a greedy match which matches 0 or more occurrences of previous character class. +: This is a greedy match which matches 1 or more occurrences of previous character class. : This is a special sequence which matches the complement of set. : This is a set which matches the class which is the union of all characters in set. %c: This is a special sequence which matches all control characters. %g: This is a special sequence which matches all printable characters except space. %p: This is a special sequence which matches all punctuation characters. %x: This is a special sequence which matches all hexadecimal digits. 
%s: This is a special sequence which matches all whitespace characters. %d: This is a special sequence which matches all digits. %u: This is a special sequence which matches all uppercase letters. %l: This is a special sequence which matches all lowercase letters. %a: This is a special sequence which matches all letters. – : This is a metacharacter which matches all characters. The Lua programming offers a set of metacharacters, special sequence and sets which have a special meaning as listed below: 
gsub(string, pattern, repl ): This function used to replace the matched string by substrings and n specify the n number of replacement.gmatch(string, pattern): This function returns a function which iterates through all matches pattern in string.match(string, pattern ): This function matches a pattern once the matching starts at the given index.find(string, pattern ]): This function returns to start and end index of a match pattern in a string.
#Regex match string software#
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