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author | Martin Odersky <odersky@gmail.com> | 2003-03-03 14:33:53 +0000 |
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committer | Martin Odersky <odersky@gmail.com> | 2003-03-03 14:33:53 +0000 |
commit | 6749e5dd658522cb63600021a9ee5a86f911cfeb (patch) | |
tree | a22d4bf7f2bf71b5775418dfddaa31a1640313d1 /sources/examples/sort.scala | |
parent | e1fb3fb655a067039870016b3a47e2305d692d98 (diff) | |
download | scala-6749e5dd658522cb63600021a9ee5a86f911cfeb.tar.gz scala-6749e5dd658522cb63600021a9ee5a86f911cfeb.tar.bz2 scala-6749e5dd658522cb63600021a9ee5a86f911cfeb.zip |
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Diffstat (limited to 'sources/examples/sort.scala')
-rw-r--r-- | sources/examples/sort.scala | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/sources/examples/sort.scala b/sources/examples/sort.scala new file mode 100644 index 0000000000..36d91b72ae --- /dev/null +++ b/sources/examples/sort.scala @@ -0,0 +1,27 @@ +module sorter { + +def sort(a: Array[Int]): Unit = { + + def swap(i: Int, j: Int): Unit = { + val t = a(i); a(i) = a(j); a(j) = t; + } + + def sort1(l: Int, r: Int): Unit = { + val pivot = a((l + r) / 2); + var i = l, j = r; + while (i <= j) { + while (a(i) < pivot) { i = i + 1 } + while (a(j) > pivot) { j = j - 1 } + if (i <= j) { + swap(i, j); + i = i + 1; + j = j - 1; + } + } + if (l < j) sort1(l, j); + if (j < r) sort1(i, r); + } + + sort1(0, a.length - 1); +} +}
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