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lisptest.e
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1992-09-02
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-> test lisp tool module
MODULE 'tools/lisp'
PROC main()
DEF a,b
-> map a reverse over lists
showcellint(map(<<1,2,3>,<4,5,6>,<7,8,9>>,{nrev}))
-> sum a list
WriteF('\n\d\n',foldr(<1,2,3>,{add},0))
-> select a list of zipped pairs whose head>tail
showcellint(filter(zip(<1,2,3,4,5>,<2,1,-1,5,4>),{greater}))
-> number of positive and negative number of elements in a list
a,b:=partition(<1,-5,8,2,-2,4,5,7>,{pos})
WriteF('\n\d \d\n',length(a),length(b))
ENDPROC
PROC add(x,y) IS x+y
PROC pos(x) IS x>=0
PROC greater(c)
DEF h,t
c <=> <h|t>
ENDPROC h>t