string  split(string s)
string  split(string s, string separators)
string  split(string s, string separators, int maxsplits)
Splits a string into tokens by removing separator characters from the string and creating an array entry for each substring bounded by separators. When no separator string is provided, the string is split on whitespace (spaces, tab, and return).
maxsplits option limits the number of times the string is split,
this is useful to peel off one token at a time from a larger string.
This differs from Python’s split() in that it takes a list of separators, not a single string to use as a separator.
This operates more as a tokenize method than as a split method. In particular, if you have repeated separators they will be merged and only a single split performed.