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POLogic to decrease character values
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Id
11326478
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AcceptedAnswerId
11342148
AnswerCount
5
ClosedDate
CommentCount
1
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CreationDate
2012-07-04T09:42:33.303
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1
LastActivityDate
2012-07-05T10:20:13.197
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text
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I am working on a logic that decreases the value of an alphanumeric <code>List<char></code>. For example, A10 becomes A9, BBA becomes BAZ, 123 becomes 122. And yes, if the value entered is the last one(like A or 0), then I should return - An additional overhead is that there is a <code>List<char></code> variable which is maintained by the user. It has characters which are to be skipped. For example, if the list contains A in it, the value GHB should become GGZ and not GHA. The base of this logic is a very simple usage of decreasing the <code>char</code> but with these conditions, I am finding it very difficult. My project is in Silverlight, the language is C#. Following is my code that I have been trying to do in the 3 methods: <pre><code> List<char> lstGetDecrName(List<char> lstVal)//entry point of the value that returns decreased value { List<char> lstTmp = lstVal; subCheckEmpty(ref lstTmp); switch (lstTmp.Count) { case 0: lstTmp.Add('-'); return lstTmp; case 1: if (lstTmp[0] == '-') { return lstTmp; } break; case 2: if (lstTmp[1] == '0') { if (lstTmp[0] == '1') { lstTmp.Clear(); lstTmp.Add('9'); return lstTmp; } if (lstTmp[0] == 'A') { lstTmp.Clear(); lstTmp.Add('-'); return lstTmp; } } if (lstTmp[1] == 'A') { if (lstTmp[0] == 'A') { lstTmp.Clear(); lstTmp.Add('Z'); return lstTmp; } } break; } return lstGetDecrValue(lstTmp,lstVal); } List<char> lstGetDecrValue(List<char> lstTmp,List<char> lstVal) { List<char> lstValue = new List<char>(); switch (lstTmp.Last()) { case 'A': lstValue = lstGetDecrTemp('Z', lstTmp, lstVal); break; case 'a': lstValue = lstGetDecrTemp('z', lstTmp, lstVal); break; case '0': lstValue = lstGetDecrTemp('9', lstTmp, lstVal); break; default: char tmp = (char)(lstTmp.Last() - 1); lstTmp.RemoveAt(lstTmp.Count - 1); lstTmp.Add(tmp); lstValue = lstTmp; break; } return lstValue; } List<char> lstGetDecrTemp(char chrTemp, List<char> lstTmp, List<char> lstVal)//shifting places eg unit to ten,etc. { if (lstTmp.Count == 1) { lstTmp.Clear(); lstTmp.Add('-'); return lstTmp; } lstTmp.RemoveAt(lstTmp.Count - 1); lstVal = lstGetDecrName(lstTmp); lstVal.Insert(lstVal.Count, chrTemp); return lstVal; } </code></pre> I seriously need help for this. Please help me out crack through this.
Tags
<c#><silverlight><logic>
Title
Logic to decrease character values
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1. PO
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1. PTQuestion
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1. USvaibhav
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2. PO
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1. VO
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 POLogic to decrease character values
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2. VO
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1. CO+1: very interesting problem. Have posted a working solution below. There is a bug in my exclusions code, mentioned, but that should be easy to fix.
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 POLogic to decrease character values
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 USGone Coding

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