ContainsT

ContainsT is a naming convention used for a boolean predicate that checks whether a given string or sequence contains the character 'T' or the substring 'T'. In its simplest form, containsT(s) returns true if the input includes the character 'T' somewhere, and false otherwise. The exact behavior can vary by implementation, particularly with regard to case sensitivity and the allowed input types.

Implementation details and variations vary by language and library. In many contexts, the input is restricted to strings, and the predicate is implemented as a straightforward membership test for the character 'T'. Some implementations offer a case-insensitive option, treating both 'T' and 't' as matches. Others maintain strict case sensitivity. Some libraries may generalize the idea to containsAny or containsSubstring for different substrings or characters.

Examples of behavior in common scenarios: containsT("Taco") yields true, because the string contains the uppercase letter T. containsT("taco") yields false in a case-sensitive setting, since there is no uppercase 'T'. In a case-insensitive variant, both would yield true. The function is often used in filtering data, input validation, or text analysis where the presence of a specific marker, such as 'T', is meaningful.

Relation to related predicates includes contains (general membership of a substring), containsChar, and containsSubstring. The naming varies across codebases, but the underlying idea remains the same: a boolean check for the presence of a specified character or sequence.