better handling of empty if/else blocks

2011-11-29 11:56:30 +02:00
parent 84cb0a179a
commit ce1718e518
7 changed files with 101 additions and 19 deletions
@@ -0,0 +1,42 @@
+fun IntArray.swap(i:Int, j:Int) {
+    val temp = this[i]
+    this[i] = this[j]
+    this[j] = temp
+}
+
+fun IntArray.quicksort() = quicksort(0, size-1)
+
+fun IntArray.quicksort(L: Int, R:Int) {
+    val m = this[(L + R) / 2]
+    var i = L
+    var j = R
+    while (i <= j) {
+        while (this[i] < m)
+            i++
+        while (this[j] > m)
+            j--
+        if (i <= j) {
+            swap(i++, j--)
+        }
+        else {
+        }
+    }
+    if (L < j)
+        quicksort(L, j)
+    if (R > i)
+        quicksort(i, R)
+}
+
+fun box() : String {
+    val a = IntArray(10)
+    for(i in 0..4) {
+        a[2*i]   =  2*i
+        a[2*i+1] = -2*i-1
+    }
+    a.quicksort()
+    for(i in 0..9) {
+        System.out?.print(a[i])
+        System.out?.print(' ')
+    }
+    return "OK"
+}