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In modern standard C++, a string literal such as "hello" still denotes a NUL-terminated array of characters. [1] Using C++ classes to implement a string type offers several benefits of automated memory management and a reduced risk of out-of-bounds accesses, [2] and more intuitive syntax for string comparison and concatenation. Therefore, it ...
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.
Java only allocates memory via object instantiation. Arbitrary memory blocks may be allocated in Java as an array of bytes. Java and C++ use different idioms for resource management. Java relies mainly on garbage collection, which can reclaim memory, [7] while C++ relies mainly on the Resource Acquisition Is Initialization (RAII) idiom. This is ...
Resource acquisition is initialization (RAII) [1] is a programming idiom [2] used in several object-oriented, statically typed programming languages to describe a particular language behavior. In RAII, holding a resource is a class invariant , and is tied to object lifetime .
In addition to support for vectorized arithmetic and relational operations, these languages also vectorize common mathematical functions such as sine. For example, if x is an array, then y = sin (x) will result in an array y whose elements are sine of the corresponding elements of the array x. Vectorized index operations are also supported.
a dynamic array, like C array (i.e., capable of random access) with the ability to resize itself automatically when inserting or erasing an object. Inserting an element to the back of the vector at the end takes amortized constant time. Removing the last element takes only constant time, because no resizing happens.
initialization of an additional variable within a range-based for statement [16] lambdas in unevaluated contexts [17] [18] default constructible and assignable stateless lambdas [17] [19] allow pack expansions in lambda init-capture [17] [20] class types in non-type template parameters, also allowing string literals as template parameters [21]
More precisely, if an array of type unsigned char is initialized using an #embed directive, the result is the same as-if the resource was written to the array using fread (unless a parameter changes the embed element width to something other than CHAR_BIT).