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produces a copy of its own source code
In computing, a quine is a computer program which produces a copy of its own source code as its only output.
python
# adapted from a Quine by Sean B. Palmer
print (lambda s='print (lambda s=%r: (s %% s))()': (s % s))()
# adapted from a Quine by Sean B. Palmer
print (lambda s='print (lambda s=%r: (s %% s))()': (s % s))()
python
x='x=%r;print(x%%x)';print(x%x)
x='x=%r;print(x%%x)';print(x%x)
clojure
(def s"(def s%s)(printf s(pr-str s))")(printf s(pr-str s))
(def s"(def s%s)(printf s(pr-str s))")(printf s(pr-str s))
groovy
s="s=%s;printf s,s.inspect()";printf s,s.inspect()
s="s=%s;printf s,s.inspect()";printf s,s.inspect()
groovy
evaluate s='char q=39;print"evaluate s=$q$s$q"'
evaluate s='char q=39;print"evaluate s=$q$s$q"'
groovy
s="s=%c%s%c;printf s,34,s,34";printf s,34,s,34
s="s=%c%s%c;printf s,34,s,34";printf s,34,s,34
groovy
s='s=%c%s%1$c;printf s,39,s';printf s,39,s
s='s=%c%s%1$c;printf s,39,s';printf s,39,s
groovy
printf _='printf _=%c%s%1$c,39,_',39,_
printf _='printf _=%c%s%1$c,39,_',39,_
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