primitive map-set-if-not-exists!

#<primitive 0x2b67870b19a0 map_set_if_not_exists>

Synopsis

(mapping key new-value)

Documentation slot

Set value of mapping unless key has already associated value


Generated by docgen.scm running on dfsch 0.4.0 (bp-0.4.0-18-g88df03b) on 2012-04-16 10:00:29