Subject: Re: Testing if an attribute is present From: Dave Love <d.love@xxxxxxxx> Date: 27 Oct 1997 20:23:00 +0000 |
>>>>> "Aidan" == Aidan Killian <aidan@xxxxxxxx> writes: Aidan> jade:metafilter.dsl:79:2:E: 1st argument for primitive "literal" of Aidan> wrong type: "#f" not a string That error's clearly not from the posted code, since in the only call of `literal', `(output-date)' must return a string (or raise an error). The fragment posted would run in Jade in the appropriate context -- and do (presumably) the right thing, though the `make sequence' seems superfluous. >>>>> "Vivek" == Vivek Agrawala <vivek@xxxxxxxxxxxxxxx> writes: Vivek> (define (get-str-attr-no-err attr-nm snl) Vivek> (let ((a-str (attribute-string attr-nm snl))) Vivek> (if (equal? a-str #f) "" a-str) )) FWIW, you might replace the body with the idiom: (or (attribute-string attr-nm snl) "") DSSSList info and archive: http://www.mulberrytech.com/dsssl/dssslist
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