Data commit

Task/Gray-code/Groovy/gray-code-1.groovy

@@ -0,0 +1,10 @@
+def grayEncode = { i ->
+    i ^ (i >>> 1)
+}
+
+def grayDecode;
+grayDecode = { int code ->
+    if(code <= 0) return 0
+    def h = grayDecode(code >>> 1)
+    return (h << 1) + ((code ^ h) & 1)
+}

Task/Gray-code/Groovy/gray-code-2.groovy

@@ -0,0 +1,21 @@
+def binary = { i, minBits = 1 ->
+    def remainder = i
+    def bin = []
+    while (remainder > 0 || bin.size() <= minBits) {
+        bin << (remainder & 1)
+        remainder >>>= 1
+    }
+    bin
+}
+
+println "number   binary   gray code   decode"
+println "======   ======   =========   ======"
+(0..31).each {
+    def code = grayEncode(it)
+    def decode = grayDecode(code)
+    def iB = binary(it, 5)
+    def cB = binary(code, 5)
+    printf("    %2d    %1d%1d%1d%1d%1d       %1d%1d%1d%1d%1d       %2d",
+        it, iB[4],iB[3],iB[2],iB[1],iB[0], cB[4],cB[3],cB[2],cB[1],cB[0], decode)
+    println()
+}