/
ch-1.ps
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ch-1.ps
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%!PS
% begin included library code
% see https://codeberg.org/Firedrake/postscript-libraries/
/test.start {
print (:) print
/test.pass 0 def
/test.count 0 def
} bind def
/test {
/test.count test.count 1 add def
{
/test.pass test.pass 1 add def
} {
( ) print
test.count (....) cvs print
(-fail) print
} ifelse
} bind def
/keys { % dict -> array of dict keys
[ exch
{
pop
} forall
]
} bind def
/values { % dict -> array of dict values
[ exch
{
exch pop
} forall
]
} bind def
/toset { % array -> dict of (value, true)
<< exch
{
true
} forall
>>
} bind def
/dget {
3 1 roll
2 copy
known {
get exch pop
} {
pop pop
} ifelse
} bind def
/test.end {
( ) print
test.count 0 gt {
(Passed ) print
test.pass (...) cvs print
(/) print
test.count (...) cvs print
( \() print
test.pass 100 mul test.count idiv (...) cvs print
(%\)) print
(\r\n) print
} if
} bind def
% end included library code
/uniqueoccurrences {
0 dict begin
/c 0 dict def
{
dup c exch 0 dget 1 add c 3 1 roll put
} forall
c values toset keys length c keys length eq {
1
} {
0
} ifelse
end
} bind def
(uniqueoccurrences) test.start
[1 2 2 1 1 3] uniqueoccurrences 1 eq test
[1 2 3] uniqueoccurrences 0 eq test
[-2 0 1 -2 1 1 0 1 -2 9] uniqueoccurrences 1 eq test
test.end