StringIsNullOrEmptys

StringIsNullOrEmptys is a utility concept used in software development to determine whether a string input should be considered absent or blank. It returns a boolean value: true when the input is null or the empty string, and false otherwise. The name reflects a project-specific convention and mirrors common patterns such as IsNullOrEmpty, though the exact semantics can vary by codebase.

Implementation and signatures differ by language. In strongly typed languages like C# or Java, it is typically declared as a static function accepting a string value, for example StringIsNullOrEmptys(string value) or StringIsNullOrEmptys(String value). In dynamically typed languages such as JavaScript, it may be implemented as a function that evaluates value against null or the empty string, for instance returning value == null || value === ''. The function usually does not treat whitespace-only strings as empty unless a variant or additional check is used.

Usage and typical applications include input validation, guarding against null references, and simplifying conditional logic where a missing or empty input should short-circuit processing. It often appears in validation pipelines, data cleaning, and parameter checks.

Variants and caveats: the name StringIsNullOrEmptys does not inherently cover whitespace-only values. Some projects provide a related function like StringIsNullOrWhiteSpace to treat null, empty, and whitespace-only strings as equivalent. Performance is typically O(1) time and O(1) space, aside from input allocation. Always align the function’s semantics with the language’s null-handling rules and project conventions.

See also: IsNullOrEmpty, IsNullOrWhiteSpace, string.IsNullOrEmpty.