Represents a regular expression pattern for string matching.
与 .wl 参考的差异： Look-around and back-references in `RegularExpression`
RegularExpression["regex"]
StringCases["adefgh12c34", RegularExpression["[a-e]+"]]
→ {ade, c}StringSplit["12X X5X X89", RegularExpression["\\B"]]
→ {1, 2, X X, 5, X X, 8, 9}StringCases["adefgh12c34", RegularExpression["[a-e]"]]
→ {a, d, e, c}