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What Is Meant By Keyword Argument In Lisp? |
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Answer» Keyword arguments are function arguments that are passed by keyword, instead of position. Keyword arguments can be mixed with by-position arguments, and default-value EXPRESSIONS can be SUPPLIED for either kind of ARGUMENT: (define greet (lambda (GIVEN #:last surname) (string-append "Hello, " given " " surname))) > (greet "John" #:last "Smith") "Hello, John Smith" > (greet #:last "Doe" "John") "Hello, John Doe" In above example last is a keyword argument. Keyword arguments are function arguments that are passed by keyword, instead of position. Keyword arguments can be mixed with by-position arguments, and default-value expressions can be supplied for either kind of argument: (define greet (lambda (given #:last surname) (string-append "Hello, " given " " surname))) > (greet "John" #:last "Smith") "Hello, John Smith" > (greet #:last "Doe" "John") "Hello, John Doe" In above example last is a keyword argument. |
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