NPL
1. New Programming Language. IBM' s original (temporary) name for PL/I, changed due to conflict with England' s "National Physical Laboratory." MPL and MPPL were cons Idered before settling on PL/I. Sammet 1969, p.542. 2. A functional language with pattern matching designed by Rod Burstall and John Darlington in 1977. The language allowed certain sets and logic constructs to appear on the right hand s Ide of definitions, E.g. setofeven(X) <= <:x: x in X & even(x) :> The NPL interpreter evaluates the list of generators from left to right so conditions can mention any bound variables that occur to their left. These were known as {set comprehension}s. NPL eventually evolved into {Hope} but lost set comprehensions which were called list comprehensions in later functional languages. [John Darlington, "Program Transformation and Synthesis: Present Capabilities", Research Report No. 77/43, Dept. of Computing and Control, Imperial College of Science and Technology, London September 1977.] 3. NonProcedural Language. A relational database language developed by T.D. Truitt et al in 1980 for Apple II and MS-DOS. ["An Introduction to Nonprocedural Languages Using NPL", T.D. Truitt et al, McGraw-Hill 1983]. In addition suitable contents: [ 2 ] [ = ] [ ag ] [ ai ] [ al ] [ am ] [ an ] [ app ] [ Apple II ] [ ar ] [ arc ] [ as ] [ at ] [ aw ] [ B ] [ b ] [ ba ] [ base ] [ be ] [ bi ] [ bo ] [ bound variable ] [ by ] [ C ] [ ca ] [ cc ] [ ch ] [ ci ] [ co ] [ com ] [ con ] [ cons ] [ cu ] [ D ] [ data ] [ database ] [ de ] [ design ] [ do ] [ DOS ] [ du ] [ E ] [ ec ] [ ed ] [ edu ] [ eg ] [ eh ] [ er ] [ era ] [ es ] [ et ] [ event ] [ fi ] [ file ] [ fo ] [ for ] [ fr ] [ function ] [ functional ] [ functional language ] [ G ] [ ge ] [ gen ] [ gh ] [ gi ] [ gl ] [ gn ] [ gr ] [ gt ] [ gu ] [ gy ] [ h ] [ hang ] [ hat ] [ hing ] [ hn ] [ Hope ] [ hr ] [ ht ] [ IBM ] [ Id ] [ ie ] [ il ] [ in ] [ int ] [ interpreter ] [ io ] [ ir ] [ is ] [ it ] [ J ] [ kn ] [ la ] [ language ] [ Lex ] [ li ] [ list ] [ list comprehension ] [ lu ] [ lv ] [ ly ] [ M ] [ ma ] [ mm ] [ mo ] [ mod ] [ module ] [ mp ] [ MPL ] [ MPP ] [ MPPL ] [ MS-DOS ] [ N ] [ na ] [ nc ] [ ne ] [ nf ] [ ng ] [ ni ] [ no ] [ NP ] [ np ] [ ns ] [ O ] [ om ] [ op ] [ OS ] [ pa ] [ pattern matching ] [ pe ] [ ph ] [ pl ] [ PL/I ] [ port ] [ PPL ] [ pr ] [ pt ] [ query ] [ rc ] [ re ] [ relation ] [ relational database ] [ rete ] [ rl ] [ ro ] [ ru ] [ S ] [ se ] [ set ] [ set comprehension ] [ si ] [ sig ] [ so ] [ st ] [ struct ] [ T ] [ tc ] [ th ] [ to ] [ tr ] [ tt ] [ ua ] [ va ] [ var ] [ variable ] [ ve ] [ X ]
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