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37 lines
1.2 KiB
Racket
37 lines
1.2 KiB
Racket
#lang racket/base
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(require racket/date)
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(require racket/string)
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(require racket/format)
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(provide (all-defined-out))
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; todo: contracts, tests, docs
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; debug utilities
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(define (message . items)
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(define (zero-fill str count)
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(set! str (~a str))
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(if (> (string-length str) count)
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str
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(string-append (make-string (- count (string-length str)) #\0) str)))
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(define (make-date-string)
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(define date (current-date))
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(define date-fields (map (λ(x) (zero-fill x 2))
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(list (date-month date)
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(date-day date)
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(date-year date)
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(modulo (date-hour date) 12)
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(date-minute date)
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(date-second date)
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(if (< (date-hour date) 12) "am" "pm"))))
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(apply format "[~a.~a.~a ~a:~a:~a~a]" date-fields))
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(displayln (string-join `(,(make-date-string) ,@(map (λ(x)(if (string? x) x (~v x))) items))) (current-error-port)))
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; report the current value of the variable, then return it
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(define-syntax-rule (report var)
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(begin
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(message 'var "=" var)
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var)) |