racket function函数操作示例代码
代码语言:racket
所属分类:其他
代码描述:racket function函数操作示例代码
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#lang racket
(lambda () "Hello World") ; => #<procedure>
;; Can also use a unicode `λ'
(λ () "Hello World") ; => same function
;; Use parens to call all functions, including a lambda expression
((lambda () "Hello World")) ; => "Hello World"
((λ () "Hello World")) ; => "Hello World"
;; Assign a function to a var
(define hello-world (lambda () "Hello World"))
(hello-world) ; => "Hello World"
;; You can shorten this using the function definition syntactic sugar:
(define (hello-world2) "Hello World")
;; The () in the above is the list of arguments for the function
(define hello
(lambda (name)
(string-append "Hello " name)))
(hello "Steve") ; => "Hello Steve"
;; ... or equivalently, using a sugared definition:
(define (hello2 name)
(string-append "Hello &qu.........完整代码请登录后点击上方下载按钮下载查看
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