Data commit

Task/SEDOLs/ActionScript/sedols.as

@@ -0,0 +1,50 @@
+//Return the code corresponding to a given character.
+//ActionScript does not have a character type, so 1-digit strings
+//are used instead
+function toSEDOLCode(char:String):uint {
+	//Make sure only a single character was sent.
+	if(char.length != 1)
+		throw new Error("toSEDOL expected string length of 1, got " + char.length);
+	//Character is uppercase
+	if (char >= "A" && char <= "Z") {
+		return SEDOL.charCodeAt() + 10 - "A".charCodeAt();
+	}
+	//Character is numeric
+	else if (char >= "0" && char <= "9"){
+		return uint(char);
+	}
+	//Error: character is neither numeric nor uppercase
+	else{
+		throw new Error("toSEDOLCode expected numeric or uppercase character, recieved " + char);
+	}
+}
+//Calculate the weighted sum for the SEDOL.
+function toSum(str:String):uint {
+	if(str.length != 6)
+		throw new Error("toSum expected length 6, recieved " + str.length);
+	var sum:uint=0;
+	for (var i:uint = 0; i < str.length; i++)
+		sum+=toSEDOLCode(str.charAt(i))*[1,3,1,7,3,9][i];
+	return sum;
+}
+//Calculate the check digit from the weighted sum.
+function toCheck(num:int):uint
+{
+	return (10 -(num % 10)) % 10;
+}
+//Print the SEDOL with the check digit added.
+function printWithCheck(SEDOL:String):void
+{
+	trace(SEDOL + toCheck(toSum(SEDOL)));
+}
+printWithCheck("710889");
+printWithCheck("B0YBKJ");
+printWithCheck("406566");
+printWithCheck("B0YBLH");
+printWithCheck("228276");
+printWithCheck("B0YBKL");
+printWithCheck("557910");
+printWithCheck("B0YBKR");
+printWithCheck("585284");
+printWithCheck("B0YBKT");
+printWithCheck("B00030");