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| author | Martin Odersky <odersky@gmail.com> | 2013-03-03 14:53:04 +0100 |
|---|---|---|
| committer | Martin Odersky <odersky@gmail.com> | 2013-03-03 15:13:18 +0100 |
| commit | 30bfa5b1be62652fc07292d36ed1261edbcdb362 (patch) | |
| tree | b5329b2721a65170b2ff6623400d0bb7cbf51bcb /src/dotty/tools/dotc/util/lrutest.sc | |
| parent | 24f5a1ef4b8a49b6a2a8c684c1c98bc6a5293813 (diff) | |
| download | dotty-30bfa5b1be62652fc07292d36ed1261edbcdb362.tar.gz dotty-30bfa5b1be62652fc07292d36ed1261edbcdb362.tar.bz2 dotty-30bfa5b1be62652fc07292d36ed1261edbcdb362.zip | |
New LRU Cache implementation
Diffstat (limited to 'src/dotty/tools/dotc/util/lrutest.sc')
| -rw-r--r-- | src/dotty/tools/dotc/util/lrutest.sc | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/src/dotty/tools/dotc/util/lrutest.sc b/src/dotty/tools/dotc/util/lrutest.sc new file mode 100644 index 000000000..6e6328b24 --- /dev/null +++ b/src/dotty/tools/dotc/util/lrutest.sc @@ -0,0 +1,40 @@ +package dotty.tools.dotc.util + +object lrutest { + println("Welcome to the Scala worksheet") //> Welcome to the Scala worksheet + val bits = new SixteenNibbles(0L) //> bits : dotty.tools.dotc.util.SixteenNibbles = SixteenNibbles(0, 0, 0, 0, 0, + //| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0) + bits.updated(1, 3) //> res0: dotty.tools.dotc.util.SixteenNibbles = SixteenNibbles(0, 3, 0, 0, 0, 0 + //| , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0) + LRUCache.initialRing //> res1: dotty.tools.dotc.util.SixteenNibbles = SixteenNibbles(1, 2, 3, 4, 5, 6 + //| , 7, 0, 0, 0, 0, 0, 0, 0, 0, 0) + val cache = new LRUCache[String, String] //> cache : dotty.tools.dotc.util.LRUCache[String,String] = LRUCache() + cache lookup "hi" //> res2: String = null + cache enter ("hi", "x") + cache.indices.take(10).toList //> res3: List[Int] = List(7, 0, 1, 2, 3, 4, 5, 6, 7, 0) + cache.last //> res4: Int = 6 + cache lookup "hi" //> res5: String = x + cache.indices.take(10).toList //> res6: List[Int] = List(7, 0, 1, 2, 3, 4, 5, 6, 7, 0) + + for (i <- 1 to 10) { + if (cache.lookup(i.toString) == null) + cache.enter(i.toString, i.toString) + } + + cache.indices.take(10).toList //> res7: List[Int] = List(5, 6, 7, 0, 1, 2, 3, 4, 5, 6) + cache //> res8: dotty.tools.dotc.util.LRUCache[String,String] = LRUCache(10 -> 10, 9 - + //| > 9, 8 -> 8, 7 -> 7, 6 -> 6, 5 -> 5, 4 -> 4, 3 -> 3) + cache //> res9: dotty.tools.dotc.util.LRUCache[String,String] = LRUCache(10 -> 10, 9 - + //| > 9, 8 -> 8, 7 -> 7, 6 -> 6, 5 -> 5, 4 -> 4, 3 -> 3) + cache.lookup("7") //> res10: String = 7 + cache.indices.take(10).toList //> res11: List[Int] = List(0, 5, 6, 7, 1, 2, 3, 4, 0, 5) + cache.keysIterator.toList //> res12: List[String] = List(7, 10, 9, 8, 6, 5, 4, 3) + cache.lookup("10") //> res13: String = 10 + cache.lookup("5") //> res14: String = 5 + cache //> res15: dotty.tools.dotc.util.LRUCache[String,String] = LRUCache(5 -> 5, 10 - + //| > 10, 7 -> 7, 9 -> 9, 8 -> 8, 6 -> 6, 4 -> 4, 3 -> 3) + cache.lookup("11") //> res16: String = null + cache.enter("11", "!!") + cache //> res17: dotty.tools.dotc.util.LRUCache[String,String] = LRUCache(11 -> !!, 5 + //| -> 5, 10 -> 10, 7 -> 7, 9 -> 9, 8 -> 8, 6 -> 6, 4 -> 4) +}
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