tasks a-s

Task/SEDOLs/JavaScript/sedols.js

@@ -0,0 +1,41 @@
+function sedol(input) {
+    return input + sedol_check_digit(input);
+}
+
+var weight = [1, 3, 1, 7, 3, 9, 1];
+function sedol_check_digit(char6) {
+    if (char6.search(/^[0-9BCDFGHJKLMNPQRSTVWXYZ]{6}$/) == -1)
+        throw "Invalid SEDOL number '" + char6 + "'";
+    var sum = 0;
+    for (var i = 0; i < char6.length; i++)
+        sum += weight[i] * parseInt(char6.charAt(i), 36);
+    var check = (10 - sum%10) % 10;
+    return check.toString();
+}
+
+var input = [
+    '710889', 'B0YBKJ', '406566', 'B0YBLH', '228276',
+    'B0YBKL', '557910', 'B0YBKR', '585284', 'B0YBKT',
+    "BOATER" , "12345", "123456", "1234567"
+];
+
+var expected = [
+    '7108899', 'B0YBKJ7', '4065663', 'B0YBLH2', '2282765',
+    'B0YBKL9', '5579107', 'B0YBKR5', '5852842', 'B0YBKT7',
+    null, null, '1234563', null
+];
+
+for (var i in input) {
+    try {
+        var sedolized = sedol(input[i]);
+        if (sedolized == expected[i])
+            print(sedolized);
+        else
+            print("error: calculated sedol for input " + input[i] +
+                  " is " + sedolized + ", but it should be " + expected[i]
+            );
+    }
+    catch (e) {
+        print("error: " + e);
+    }
+}