Search results
Results From The WOW.Com Content Network
In the Perl programming language, autovivification is the automatic creation of new arrays and hashes as required every time an undefined value is dereferenced. Perl autovivification allows a programmer to refer to a structured variable, and arbitrary sub-elements of that structured variable, without expressly declaring the existence of the ...
JSON Pointer [10] defines a string syntax for identifying a single value within a given JSON value of known structure. JSONiq [ 11 ] is a query and transformation language for JSON. XPath 3.1 [ 12 ] is an expression language that allows the processing of values conforming to the XDM [ 13 ] data model.
The ::= rule defines a new algebraic data type, a data type with only data constructors.; The <~ rule defines an interface type - it indicates what properties are characteristic of a person and also gives type constraints on these properties.
Like Pascal, FORTRAN II, Fortran 66, Fortran 77, and later versions of Fortran specify return values by an assignment to the function name, but also have a return statement; that statement does not specify a return value and, for a function, causes the value assigned to the function name to be returned. [5] [7] [8]
If the character is not found most of these routines return an invalid index value – -1 where indexes are 0-based, 0 where they are 1-based – or some value to be interpreted as Boolean FALSE. This can be accomplished as a special case of #Find , with a string of one character; but it may be simpler or more efficient in many languages to ...
Folds can be regarded as consistently replacing the structural components of a data structure with functions and values. Lists, for example, are built up in many functional languages from two primitives: any list is either an empty list, commonly called nil ([]), or is constructed by prefixing an element in front of another list, creating what is called a cons node ( Cons(X1,Cons(X2,Cons ...
Elements can be removed from the end of a dynamic array in constant time, as no resizing is required. The number of elements used by the dynamic array contents is its logical size or size , while the size of the underlying array is called the dynamic array's capacity or physical size , which is the maximum possible size without relocating data.
[4] [5] The topmost element in the structure must be of type BSON object and contains 1 or more elements, where an element consists of a field name, a type, and a value. Field names are strings. Field names are strings.