StringSplit

• 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[s, patt:>val] evaluates val only when the pattern is found.

• StringSplit["string", {p₁->v₁, ..., p_a, ...}] includes v₁ at the position of delimiters matching p₁, but omits delimiters matching p_a.

• 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 lowercase and uppercase letters as equivalent.

• StringSplit["string", RegularExpression["regex"]] splits at delimiters matching the specified regular expression.