Initial commit

1 files changed, 17 insertions, 0 deletions

diff --git a/src/main/java/moe/nea/caelo/util/Histogram.kt b/src/main/java/moe/nea/caelo/util/Histogram.kt
new file mode 100644
index 0000000..6c4add1
--- /dev/null
+++ b/src/main/java/moe/nea/caelo/util/Histogram.kt
@@ -0,0 +1,17 @@
+package moe.nea.caelo.util
+
+class Histogram<T>(val maxSize: Int) : Iterable<T> {
+    private val dequeue = ArrayDeque<T>()
+    fun append(element: T) {
+        dequeue.addLast(element)
+        if (dequeue.size > maxSize) {
+            dequeue.removeFirst()
+        }
+    }
+
+    val size get() = dequeue.size
+
+    override fun iterator(): Iterator<T> {
+        return dequeue.iterator()
+    }
+}
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