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  2. Command-line argument parsing - Wikipedia

    en.wikipedia.org/wiki/Command-line_argument_parsing

    PHP uses argc as a count of arguments and argv as an array containing the values of the arguments. [ 4 ] [ 5 ] To create an array from command-line arguments in the -foo:bar format, the following might be used:

  3. Function pointer - Wikipedia

    en.wikipedia.org/wiki/Function_pointer

    A function pointer, also called a subroutine pointer or procedure pointer, is a pointer referencing executable code, rather than data. Dereferencing the function pointer yields the referenced function, which can be invoked and passed arguments just as in a normal function call.

  4. First-class function - Wikipedia

    en.wikipedia.org/wiki/First-class_function

    A simple example of a higher-ordered function is the map function, which takes, as its arguments, a function and a list, and returns the list formed by applying the function to each member of the list. For a language to support map, it must support passing a function as an argument.

  5. Array (data structure) - Wikipedia

    en.wikipedia.org/wiki/Array_(data_structure)

    The dope vector is a complete handle for the array, and is a convenient way to pass arrays as arguments to procedures. Many useful array slicing operations (such as selecting a sub-array, swapping indices, or reversing the direction of the indices) can be performed very efficiently by manipulating the dope vector. [2]

  6. C (programming language) - Wikipedia

    en.wikipedia.org/wiki/C_(programming_language)

    Function parameters are passed by value, although arrays are passed as pointers, i.e. the address of the first item in the array. Pass-by-reference is simulated in C by explicitly passing pointers to the thing being referenced. C program source text is free-form code.

  7. Function (computer programming) - Wikipedia

    en.wikipedia.org/wiki/Function_(computer...

    A copy of the argument is passed in and the value computed during the call is copied to the argument on return: Algol, Swift in-out parameters by name: Like a macro – replace the parameters with the unevaluated argument expressions, then evaluate the argument in the context of the caller every time that the callable uses the parameter: Algol ...

  8. Template (C++) - Wikipedia

    en.wikipedia.org/wiki/Template_(C++)

    A class template is instantiated by passing a given set of types to it as template arguments. [5] The C++ Standard Library contains many class templates, in particular the containers adapted from the Standard Template Library, such as vector.

  9. Type signature - Wikipedia

    en.wikipedia.org/wiki/Type_signature

    Notice that the type of the result can be regarded as everything past the first supplied argument. This is a consequence of currying, which is made possible by Haskell's support for first-class functions; this function requires two inputs where one argument is supplied and the function is "curried" to produce a function for the argument not supplied.