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