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Power set: Difference between revisions
→{{header|PARI/GP}}: Add forsubset example
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=={{header|PARI/GP}}==
<lang parigp>vector(1<<#S,i,vecextract(S,i-1))</lang>
In 2.10, the <code>forsubset</code> iterator was added to efficiently iterate over combinations and power sets.
<lang parigp>S=["a","b","c"]
forsubset(#S,s,print1(vecextract(S,s)" "))</lang>
{{out}}
<pre>[] ["a"] ["b"] ["c"] ["a", "b"] ["a", "c"] ["b", "c"] ["a", "b", "c"]</pre>
=={{header|Perl}}==
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