Server Side Programming Articles - Page 1853 of 2650

In this article we will be discussing the working, syntax and examples of std::is_rvalue_reference template in C++ STL. is_rvalue_reference template in C++ is used to check whether the defined type is a rvalue reference or not.What is an rvalue?Rvalues are the values which are on the right side of an assignment operator. Rvalues are the valueWhat is rvalue reference?Rvalue reference is identified by double ampersand symbol (&&). This is used to initialise it with only the rvalue value.Syntaxint&& a;Syntaxtemplate is_rvalue_reference;ParametersThe template can have only parameter of type T, and check whether the given type is a rvalue reference or ... Read More

In this article we will be discussing the working, syntax and examples of std::is_lvalue_reference template in C++ STL.is_lvalue_reference template in C++ is used to check whether the defined type is an lvalue reference or not.What is an lvalue?Lvalues are the values which are on the left side of an assignment operator. Lvalues are the expressions which refer to the memory location.What is Lvalue reference?Lvalue reference is a reference which binds to a lvalue. This is very similar to how we used to refer to a variable in traditional C++ or C language, i.e. by using ampersand symbol (&) with the ... Read More

In this article we will be discussing the working, syntax and examples of iswgraph() function in C++ STL.iswgraph() is a function which comes under the header file. This function is used to check whether the given wide character has any graphical representation or not. The function is the wide character version of the function isgraph which comes under header file.Which wide characters have graphical representation?All the wide characters which can be printed on screen are the those which are having a graphical representation. Except the escape characters are those which are having the graphical representation.Syntaxint iswgraph(ch);ParametersThe function accepts ... Read More

In this article we will be discussing the working, syntax and examples of std::is_const template in C++ STL.is_const template in C++ is used to check whether the defined type is a const-qualified type or not.What is const-qualified type?We say a type as a const-qualified when the value of the type is constant. Constant data type is a type in which once a value is initialised in a const can’t be changed or altered throughout the program.Syntaxtemplate is_const;ParametersThe template can have only parameter of type T, and check whether the given type is a constqualifier or notReturn valueIt returns a ... Read More

In this article we will be discussing the working, syntax and examples of std::is_class template in C++ STL.is_class template is used to check whether the defined type is class type not any other type.What is a class?A class is an user defined data type or a data structure which contains some data members or member functions which is declared with the keyword ‘class’.Exampleclass abc {    int data_members;    void member_function(); };So, is_class template checks that the type T is a class, and returns the Boolean value true or false accordingly.Syntaxtemplate is_class;ParametersThe template can have only parameter of type ... Read More

In this article we will be discussing the working, syntax and examples of tan() function for complex numbers in C++ STL.tan() for complex numbers is a function which comes under the header file. This function is used to find the tangent of the complex number associated with it. This function is the complex version of simple tan() which comes under header file.What are complex numbers?Complex numbers are the numbers which are the combination of real number and imaginary number.They are written as: a+biWhere a and b are the real numbers and i is an imaginary number.Syntaxtemplate complex tan ... Read More

In this article we will be discussing the working, syntax and examples of log10() function in C++ STL.What is log10() function?log10() function is an inbuilt function in C++ STL, which is defined in header file. log10() is used to find the common logarithmic value of a complex number. This function returns the common complex log value with base 10 of a complex number num.Syntaxtemplate complex log10(const complex& num);ParametersThis function accepts one parameter num, which is a complex value whose log we have to find.Return valueThe common complex log value of num we want to calculate.ExampleInput: complex C_number(-4.0, -1.0);   ... Read More

In this article we will be discussing the working, syntax and examples of log() function in C++ STL.What is the log() function?log() function is an inbuilt function in C++ STL, which is defined in header file. log() returns complex natural logarithmic value of a complex value. The difference between the log() in math header file and log() of complex header file is that it is used to calculate the complex logarithmic where log() of math header file calculates normal logarithmic value.Syntaxtemplate complex log(const complex& x);ParametersThis function accepts one parameter which is a complex value whose log we have to ... Read More

In this article we will be discussing the working, syntax and examples of match_results::size() function in C++ STL.What is a match_results in C++ STL?std::match_results is a specialized container-like class which is used to hold the collection of character sequences which are matched. In this container class a regex match operation finds the matches of the target sequence.What is match_results::size()?match_results::size() function is an inbuilt function in C++ STL, which is defined in header file. size() is used to get the number of matches of the match_results object associated with it. This function returns a size_type value that is the number ... Read More

In this article we will be discussing the working, syntax and examples of match_results::prefix() and match_results::suffix() functions in C++ STL.What is a match_results in C++ STL?std::match_results is a specialized container-like class which is used to hold the collection of character sequences which are matched. In this container class a regex match operation finds the matches of the target sequence.What is match_results:: prefix()?match_results::prefix() function is an inbuilt function in C++ STL, which is defined in header file. prefix() is used to get the preceding match_results of the object associated with the function. This function returns the reference of the succeeding ... Read More