On 07/22/2016 07:58 PM, David Storrs wrote:
Thanks Jon, I appreciate the clear explanation.
I'm using call-with-values in database code in order to turn a list into
an acceptable set of bind parameters. Here's an example:
(query-exec conn "insert into foo (bar, baz) values ($1, $2)" (some-func))
some-func returns a list, '("bob", "george"). query-exec throws an
exception because it wants to see two elements for the bind parameters,
not a list. The solution I found was this:
(call-with-values
(lambda () (apply values the-list))
(curry query-exec conn stmt))
You can also write that as just
(apply query-exec conn stmt the-list)
so your example above would be
(apply query-exec
conn
"insert into foo (bar, baz) values ($1, $2)"
(some-func))
Ryan
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