StringContainsQ

StringContainsQ["string", patt]: returns True if any part of string matches patt, and returns False otherwise.
StringContainsQ[{“s1”, “s2”, ...}, patt]: returns the list of results for each element of string list.
StringContainsQ[patt]: represents an operator form of StringContainsQ that can be applied to an expression.

- StringContainsQ["mathics", "m" ~~ __ ~~ "s"]
- StringContainsQ["mathics", "a" ~~ __ ~~ "m"]
- StringContainsQ[{"g", "a", "laxy", "universe", "sun"}, "u"]
- StringContainsQ["e" ~~ ___ ~~ "u"] /@ {"The Sun", "Mercury", "Venus", "Earth", "Mars", "Jupiter", "Saturn", "Uranus", "Neptune"}