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attr-present? ; Test if an attribute is present
disposition-values
ymd->english
ymd->dateformat
default-authorname
default-title
tx-strs
first-words
build-note-id
notes->last-disposition-values
)
(define default-authorname "Joel Dueck")
(define (default-title date)
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(define (tx-strs xpr)
(cond
[(txexpr? xpr) (apply string-append (map tx-strs (get-elements xpr)))]
[(string? xpr) xpr]
[else ""]))
(define (first-words str n)
(define trunc
(apply string-append
(add-between (take (string-split str) n) " ")))
;; Remove trailing punctuation (commas, etc.)
(regexp-replace #px"\\W+$" trunc ""))
(module+ test
(require rackunit)
(define test-metas (hash 'name "Fiver" 'size "Small"))
(define test-attrs '([name "Hazel"] [rank "Chief"]))
(parameterize ([current-metas test-metas])
(check-equal? (maybe-meta 'name) "Fiver") ; present meta
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