This article explains Java's immutable String class, covering three ways to instantiate strings, methods for length, concatenation (concat and +), character access, substring extraction, splitting, replacing, searching, and comparison using equals versus ==, with concrete code examples and key rules for each operation.
This article explains the C preprocessor's macro‑expansion rules, detailing when macro arguments are expanded, how replacement‑list macros behave, special cases involving the # and ## operators, and provides step‑by‑step examples and techniques for controlling expansion.
This article explains Python tuples as immutable ordered collections, covering their creation, indexing (including negative indices), slicing with optional stride, concatenation and replication operators, and useful built‑in functions such as len, max, and min, while contrasting tuples with lists.
This article explains Java's String class, covering its automatic import, how to create string objects without the new keyword, concatenation, immutability, common methods like replace, and provides useful API references and code examples for practical use.
