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Diffstat (limited to 'miralib/ex/quicksort.m')
| -rw-r--r-- | miralib/ex/quicksort.m | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/miralib/ex/quicksort.m b/miralib/ex/quicksort.m new file mode 100644 index 0000000..2da7d55 --- /dev/null +++ b/miralib/ex/quicksort.m @@ -0,0 +1,12 @@ +||this is a functional version of quicksort, to see it work, say: +|| qsort testdata +||the reason we have to call the function `qsort' rather than `sort' is +||because there is a `sort' already defined in the standard environment + +qsort [] = [] +qsort (a:x) = qsort [b|b<-x;b<=a] ++ [a] ++ qsort[b|b<-x;b>a] + +testdata = f 10 +f n = concat(transpose [[0,2..2*n],[2*n-1,2*n-3..1]]) + +||note that the sort included in the standard environment is merge-sort |