On Jul 30, 2007, at 10:23 AM, Joshua Griffith wrote:
Hello,
I'm trying to use format to create a string consisting of the cars
of a list of lists delimited by commas and enclosed by
parentheses. I tried the following statement:
(format #f "(~:{~a~:^, ~})" '((prop1 val1) (prop2 val2) (prop3 val3)))
Umm, according to the "format-modular" doc, '~:^' is not implemented.
Sorry.
Out of the unimplemented feature set this is probably the next one
that should be done. Will you open a TRAC ticket please.
Kon
But it returns:
"(prop1, prop2, prop3, )"
However, I'm trying to get:
"(prop1, prop2, prop3)"
It seems that ~:^ is not escaping on the last element, causing the
last comma and space to be emitted. Does anyone know how to modify
the format statement to eliminate the last comma and space? I know
that I could just map car and format the result, but I'm trying to
learn more about format.
Thanks,
Joshua
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