null-not-null v1.0.0

This package provides operations to handle null and undefined values.

Functions

• isNull(obj) - returns true when type of obj is undefined or obj equals to null; otherwise false
• notNull(obj) - an equivalent of !isNull(obj); use only in filter-like functions
• isUndefined(obj) - returns true when type of obj is undefined; otherwise false
• notUndefined(obj) - an equivalent of !isUndefined(obj); use only in filter-like functions

Types

• Nullable<T> - an equivalent of T | null | undefined
• NotNull - an union of all primitive types besides null and undefined
• ExcludeNull<T> - an equivalent of Exclude<T, null | undefined>
• IncludesNull<T> - equals to true when null or undefined extends T; otherwise false