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In computer programming, lazy initialization is the tactic of delaying the creation of an object, the calculation of a value, or some other expensive process until the first time it is needed.
The most vexing parse is a counterintuitive form of syntactic ambiguity resolution in the C++ programming language. In certain situations, the C++ grammar cannot distinguish between the creation of an object parameter and specification of a function's type. In those situations, the compiler is required to interpret the line as a function type ...
similar to a set, multiset, map, or multimap, respectively, but implemented using a hash table; keys are not ordered, but a hash function must exist for the key type. These types were left out of the C++ standard; similar containers were standardized in C++11, but with different names (unordered_set and unordered_map). Other types of containers ...
Java constructors perform the following tasks in the following order: Call the default constructor of the superclass if no constructor is defined. Initialize member variables to the specified values. Executes the body of the constructor. Java permit users to call one constructor in another constructor using this() keyword.
If we take a closer look, in the beginning, age, semester and student_number are initialized. But the initialization of the first_name and last_name members are incorrect. This is because if the length of first_name and last_name character arrays are less than 16 bytes, during the strcpy , [ 1 ] we fail to fully initialize the entire 16 bytes ...
In computer science, an associative array, map, symbol table, or dictionary is an abstract data type that stores a collection of (key, value) pairs, such that each possible key appears at most once in the collection. In mathematical terms, an associative array is a function with finite domain. [1] It supports 'lookup', 'remove', and 'insert ...
In Java, several factories are used in the javax.xml.parsers package, such as javax.xml.parsers.DocumentBuilderFactory or javax.xml.parsers.SAXParserFactory. In the HTML5 DOM API , the Document interface contains a createElement() factory method for creating specific elements of the HTMLElement interface.
ALGLIB is an open source / commercial numerical analysis library with C++ version; Armadillo is a C++ linear algebra library (matrix and vector maths), aiming towards a good balance between speed and ease of use. [1] It employs template classes, and has optional links to BLAS and LAPACK. The syntax is similar to MATLAB.