StringSplit
 Usage
• StringSplit["string"] splits "string" into a list of substrings separated by whitespace.
• StringSplit["string", patt] splits into substrings separated by delimiters matching the string expression patt.
• StringSplit["string", { ,  , ... }] splits at any of the  .
• StringSplit["string", patt -> val] inserts val at the position of each delimiter.
• StringSplit["string", { ->  , ... }] inserts  at the position of each delimiter  .
• StringSplit["string", patt, n] splits into at most n substrings.
• StringSplit[{ ,  , ... }, p] gives the list of results for each of the  .
Notes
• Example: StringSplit["a bb cc a"]  . • StringSplit[s] does not return the whitespace characters that delimit the substrings it returns. • Whitespace includes any number of spaces, tabs and newlines. • The string expression patt can contain any of the objects specified in the notes for StringExpression. • StringSplit[s] is equivalent to StringSplit[s, Whitespace]. • If s contains two adjacent delimiters, StringSplit considers there to be a zero-length substring "" between them. • StringSplit[s, patt] by default gives the list of substrings of s that occur between delimiters defined by patt; it does not include the delimiters themselves. • StringSplit[s, patt -> val] includes val at the position of each delimiter. • StringSplit["string", { ->  , ... ,  , ... }] includes  at the position of delimiters matching  , but omits delimiters matching  . • By default, StringSplit[s, patt] drops zero-length substrings associated with delimiters that appear at the beginning or end of s. • StringSplit[s, patt, All] returns all substrings, including zero-length ones at the beginning or end. • Setting the option IgnoreCase -> True makes StringSplit treat lower- and upper-case letters as equivalent. • StringSplit["string", RegularExpression["regex"]] splits at delimiters matching the specified regular expression. • New in Version 5.1.
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