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John Scholes was responsible for numerous presentations and publications on and about dfns, and until his passing he maintained the [https://dfns.dyalog.com dfns dfns website]. | John Scholes was responsible for numerous presentations and publications on and about dfns, and until his passing he maintained the [https://dfns.dyalog.com dfns dfns website]. | ||
As of 2020, dfns are fully implemented in [[Dyalog APL]], [[NARS2000]], [[ngn/apl]], [[dzaima/APL]], and partially in [[GNU APL]], although not all dialects implement [[wikipedia:lexical scoping|lexical scoping]], in contrast to the dynamic scoping of [[tradfn]]s. | As of 2020, dfns are fully implemented in [[Dyalog APL]], [[NARS2000]], [[ngn/apl]], [[dzaima/APL]], and partially in [[GNU APL]], although not all dialects implement [[wikipedia:lexical scoping|lexical scoping]], in contrast to the dynamic scoping of [[tradfn]]s. In other words, a dfn cannot "see" locals of its caller, but can see locals of its definer. | ||
Wikipedia includes a thorough treatment of [[Wikipedia:dfns|dfns]]. | Wikipedia includes a thorough treatment of [[Wikipedia:dfns|dfns]]. |