Tests whether a substring occurs in a string.
StringContainsQ["string", patt]
StringContainsQ["string", {patt1, patt2, …}]
StringContainsQ[{"string1", "string2", …}, patt]
StringContainsQ[patt]
StringContainsQ["Hello world", "world"]
→ TrueStringContainsQ["Hello world", "planet"]
→ FalseSelect[{"CAC1", "CTG1", "ACT1", "CGA1", "CTC1"}, StringContainsQ["G"]]
→ {CTG1, CGA1}- IgnoreCase — default False