Data commit

Task/Middle-three-digits/Groovy/middle-three-digits-1.groovy

@@ -0,0 +1,8 @@
+def middleThree(Number number) {
+    def text = Math.abs(number) as String
+    assert text.size() >= 3 : "'$number' must be more than 3 numeric digits"
+    assert text.size() % 2 == 1 : "'$number' must have an odd number of digits"
+
+    int start = text.size() / 2 - 1
+    text[start..(start+2)]
+}

Task/Middle-three-digits/Groovy/middle-three-digits-2.groovy

@@ -0,0 +1,8 @@
+[123, 12345, 1234567, 987654321, 10001, -10001, -123, -100, 100, -12345, 1, 2, -1, -10, 2002, -2002, 0].each { number ->
+    def text = (number as String).padLeft(10)
+    try {
+        println "$text: ${middleThree(number)}"
+    } catch(AssertionError error) {
+        println "$text cannot be converted: $error.message"
+    }
+}