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Indentation fixes.
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@ -102,8 +102,8 @@ some-var ; => 5
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;; Local binding: me is bound to "Bob" only within (let ...)
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(let ([me "Bob"])
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"Alice"
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me) ; => "Bob"
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"Alice"
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me) ; => "Bob"
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; 3. Structs and Collections
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@ -250,20 +250,20 @@ m ; => '#hash((b . 2) (a . 1) (c . 3))
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(if #t ; test expression
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"this is true" ; then expression
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"this is false" ; else expression
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) ; => "this is true"
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"this is false") ; else expression
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; => "this is true"
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;; In conditionals, all non-#f values are treated as true
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(member "Groucho" '("Harpo" "Groucho" "Zeppo")) ; => '("Groucho" "Zeppo")
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(if (member "Groucho" '("Harpo" "Groucho" "Zeppo"))
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'yep
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'nope) ; => 'yep
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'yep
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'nope)
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; => 'yep
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;; "cond" chains a series of tests to select a result
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(cond
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[(> 2 2) (error "wrong!")]
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[(< 2 2) (error "wrong again!")]
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[else 'ok]) ; => 'ok
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(cond [(> 2 2) (error "wrong!")]
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[(< 2 2) (error "wrong again!")]
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[else 'ok]) ; => 'ok
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;;; Pattern Matching
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@ -296,13 +296,13 @@ m ; => '#hash((b . 2) (a . 1) (c . 3))
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;;; Comprehensions
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(for/list ([i '(1 2 3)])
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(add1 i)) ; => '(2 3 4)
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(add1 i)) ; => '(2 3 4)
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(for/list ([i '(1 2 3)] #:when (even? i))
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i) ; => '(2)
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i) ; => '(2)
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(for/hash ([i '(1 2 3)])
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(values i (number->string i))) ; => '#hash((1 . "1") (2 . "2") (3 . "3"))
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(values i (number->string i))) ; => '#hash((1 . "1") (2 . "2") (3 . "3"))
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;; To combine iteration results, use "for/fold"
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(for/fold ([sum 0]) ([i '(1 2 3 4)])
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@ -448,7 +448,7 @@ vec ; => #(1 2 3 4)
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(define amount 0)
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(define (deposit a) (set! amount (+ amount a)))
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(define (balance) amount)
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)
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)
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(require 'bank-account)
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(deposit 5)
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