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  4. Magic of if...else...programming

Magic of if...else...programming

Scheduled Pinned Locked Moved The Weird and The Wonderful
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  • V vaghelabhavesh

    This code reminds me one developer working under me, according to her every if has to have else, you can't use if alone. :-)

    G Offline
    G Offline
    GibbleCH
    wrote on last edited by
    #10

    Those are the people you don't have working for you for long...one would hope.

    V 1 Reply Last reply
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    • P PIEBALDconsult

      Why would you need to? I never have. And for that purpose you can write it specifically for debugging and then put it back to "normal" once you're satisfied with that bit (and not with conditional compiling). I had to do that sort of thing once a week or so ago. It works for me, others may choose other paths.

      L Offline
      L Offline
      Luc Pattyn
      wrote on last edited by
      #11

      I'm afraid you overlooked the little joke icon; I seldom set a breakpoint so I will not break up things that belong together just to facilitate a potential later debug action. :)

      Luc Pattyn [Forum Guidelines] [My Articles]


      Love, happiness and fewer bugs for 2009!


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      • L Luc Pattyn

        I'm afraid you overlooked the little joke icon; I seldom set a breakpoint so I will not break up things that belong together just to facilitate a potential later debug action. :)

        Luc Pattyn [Forum Guidelines] [My Articles]


        Love, happiness and fewer bugs for 2009!


        P Offline
        P Offline
        PIEBALDconsult
        wrote on last edited by
        #12

        Oh, yes, indeed I did, thanks. It's because the coffee was still dripping. We had a power outage this morning so the coffee maker didn't start automatically. I'd better get a UPS for it.

        1 Reply Last reply
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        • G GibbleCH

          Those are the people you don't have working for you for long...one would hope.

          V Offline
          V Offline
          vaghelabhavesh
          wrote on last edited by
          #13

          Yeah Its been two years. I asked the HR department to improve filtering & recruitment process but as they are looking for cheap labor I don't think this will ever happen.

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          • L Luc Pattyn

            Nah. This is much more difficult to debug, how would you set a breakpoint anywhere inside such a complex expression?

            Luc Pattyn [Forum Guidelines] [My Articles]


            Love, happiness and fewer bugs for 2009!


            A Offline
            A Offline
            Andrew Rissing
            wrote on last edited by
            #14

            If the statement fails, just put a breakpoint on the entire statement. Then, highlight each portion, right click, and select 'Add to Watch'. Viola! You'll see whether or not the statement passed. Rinse and repeat.

            A L 2 Replies Last reply
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            • A Andrew Rissing

              If the statement fails, just put a breakpoint on the entire statement. Then, highlight each portion, right click, and select 'Add to Watch'. Viola! You'll see whether or not the statement passed. Rinse and repeat.

              A Offline
              A Offline
              Andrew Rissing
              wrote on last edited by
              #15

              And yes...I know it was a joke. But still...not sure if everyone knows of such ;)

              P 1 Reply Last reply
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              • A Andrew Rissing

                If the statement fails, just put a breakpoint on the entire statement. Then, highlight each portion, right click, and select 'Add to Watch'. Viola! You'll see whether or not the statement passed. Rinse and repeat.

                L Offline
                L Offline
                Luc Pattyn
                wrote on last edited by
                #16

                Thank you for the tip; I rarely use those fancy debug features. It does widen the scope of the breakpoint, hence requires more human intervention to narrow it down, but it works. :)

                Luc Pattyn [Forum Guidelines] [My Articles]


                Love, happiness and fewer bugs for 2009!


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                • A Andrew Rissing

                  And yes...I know it was a joke. But still...not sure if everyone knows of such ;)

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                  PIEBALDconsult
                  wrote on last edited by
                  #17

                  I certainly didn't, and I probably won't the next time I could use it.

                  1 Reply Last reply
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                  • T Timothy Byrd

                    Oddly enough, I just got rid of some code that looked a bit like that...

                    bool InitRoutine()
                    {
                    bool failed=false;

                    ValType val;
                    
                    HRESULT ans = GetValue1(val);
                    if (ans==S\_OK)
                        {
                        globalVal1 = val;
                        }
                    else
                        {
                        failed = failed || true;
                        }
                    
                    ans = GetValue2(val);
                    if (ans==S\_OK)
                        {
                        globalVal2 = val;
                        }
                    else
                        {
                        failed = failed || true;
                        }
                    
                    ans = GetValue3(val);
                    if (ans==S\_OK)
                        {
                        globalVal3 = val;
                        }
                    else
                        {
                        failed = failed || true;
                        }
                    
                    ans = GetValue4(val);
                    if (ans==S\_OK)
                        {
                        globalVal4 = val;
                        }
                    else
                        {
                        failed = failed || true;
                        }
                    
                    
                    return !failed;
                    }
                    
                    S Offline
                    S Offline
                    Shaun Wilde
                    wrote on last edited by
                    #18

                    Ah a follower of the 'there must be only one return statement per method cult'.

                    I'll be more enthusiastic about encouraging thinking outside the box when there's evidence of any thinking going on inside it. - pTerry
                    BizSquawk

                    P 1 Reply Last reply
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                    • V vaghelabhavesh

                      Yeah Its been two years. I asked the HR department to improve filtering & recruitment process but as they are looking for cheap labor I don't think this will ever happen.

                      G Offline
                      G Offline
                      GibbleCH
                      wrote on last edited by
                      #19

                      That's not cheap though, it's way more expensive in the long run if they aren't competent. More fixing bugs, and longer development time. And what the heck kind of code would they put in the else if you don't technically need an else?

                      V K 2 Replies Last reply
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                      • S Shaun Wilde

                        Ah a follower of the 'there must be only one return statement per method cult'.

                        I'll be more enthusiastic about encouraging thinking outside the box when there's evidence of any thinking going on inside it. - pTerry
                        BizSquawk

                        P Offline
                        P Offline
                        PIEBALDconsult
                        wrote on last edited by
                        #20

                        A misguided one, gives the rest of us a bad name. Though I don't see where any other returns would go.

                        1 Reply Last reply
                        0
                        • G GibbleCH

                          That's not cheap though, it's way more expensive in the long run if they aren't competent. More fixing bugs, and longer development time. And what the heck kind of code would they put in the else if you don't technically need an else?

                          V Offline
                          V Offline
                          vaghelabhavesh
                          wrote on last edited by
                          #21

                          GibbleCH wrote:

                          And what the heck kind of code would they put in the else if you don't technically need an else?

                          I have no idea man....Thank god I am in a different company now :-)

                          1 Reply Last reply
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                          • R Robert Rohde

                            How would you think of this?

                            return dt != null && dt.Rows.Count > 0 && (int)t.Rows[0]["Number"] == 1;

                            The last part depends on the data the table contains. But if its clear that the column is filled with integers then this should be more efficient.

                            B Offline
                            B Offline
                            BadKarma
                            wrote on last edited by
                            #22

                            Just a question: What if there is no value integer or otherwise in t.Rows[0]["Number"]? Wouldn't this result into a crash.

                            Learn from the mistakes of others, you may not live long enough to make them all yourself.

                            R C 2 Replies Last reply
                            0
                            • T Timothy Byrd

                              Oddly enough, I just got rid of some code that looked a bit like that...

                              bool InitRoutine()
                              {
                              bool failed=false;

                              ValType val;
                              
                              HRESULT ans = GetValue1(val);
                              if (ans==S\_OK)
                                  {
                                  globalVal1 = val;
                                  }
                              else
                                  {
                                  failed = failed || true;
                                  }
                              
                              ans = GetValue2(val);
                              if (ans==S\_OK)
                                  {
                                  globalVal2 = val;
                                  }
                              else
                                  {
                                  failed = failed || true;
                                  }
                              
                              ans = GetValue3(val);
                              if (ans==S\_OK)
                                  {
                                  globalVal3 = val;
                                  }
                              else
                                  {
                                  failed = failed || true;
                                  }
                              
                              ans = GetValue4(val);
                              if (ans==S\_OK)
                                  {
                                  globalVal4 = val;
                                  }
                              else
                                  {
                                  failed = failed || true;
                                  }
                              
                              
                              return !failed;
                              }
                              
                              M Offline
                              M Offline
                              Malli_S
                              wrote on last edited by
                              #23

                              Err ! Was that guy thinking to leave the company while writing this code ? :^)

                              [Delegates]      [Virtual Desktop]      [Tray Me !]
                              -Malli...! :rose:****

                              1 Reply Last reply
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                              • S Stephen Hewitt

                                What's so bad about that? I'd do it like the following but I've seen far worse than that code:

                                // Only proceed id if 'dt' is valid and contains at least one row.
                                if (dt == NULL)
                                return false;
                                if (dt.Rows.Count == 0)
                                return false;
                                 
                                return (t.Rows[0]["Number"].ToString() == "1");

                                K Offline
                                K Offline
                                KarstenK
                                wrote on last edited by
                                #24

                                Thats fine code: logical development (right order) and easy to understand and maintain. :-O

                                Greetings from Germany

                                1 Reply Last reply
                                0
                                • V vaghelabhavesh

                                  This code reminds me one developer working under me, according to her every if has to have else, you can't use if alone. :-)

                                  K Offline
                                  K Offline
                                  KarstenK
                                  wrote on last edited by
                                  #25

                                  Did your hear about the Zune (aka as Y2k9) bug? There was missing an else. X|

                                  Greetings from Germany

                                  1 Reply Last reply
                                  0
                                  • B BadKarma

                                    Just a question: What if there is no value integer or otherwise in t.Rows[0]["Number"]? Wouldn't this result into a crash.

                                    Learn from the mistakes of others, you may not live long enough to make them all yourself.

                                    R Offline
                                    R Offline
                                    Robert Rohde
                                    wrote on last edited by
                                    #26

                                    Thats why I wrote the following after the code block:

                                    The last part depends on the data the table contains. But if its clear that the column is filled with integers then this should be more efficient.

                                    Probably I should have added: ... and otherwise the code will explode. :-D

                                    1 Reply Last reply
                                    0
                                    • B BadKarma

                                      Just a question: What if there is no value integer or otherwise in t.Rows[0]["Number"]? Wouldn't this result into a crash.

                                      Learn from the mistakes of others, you may not live long enough to make them all yourself.

                                      C Offline
                                      C Offline
                                      che3358
                                      wrote on last edited by
                                      #27

                                      I believe it will be another if...else IF the developer knew to deal with the DBNull issue that you mentioned. Now, how many ELSE he has? :)

                                      1 Reply Last reply
                                      0
                                      • R Robert Rohde

                                        How would you think of this?

                                        return dt != null && dt.Rows.Count > 0 && (int)t.Rows[0]["Number"] == 1;

                                        The last part depends on the data the table contains. But if its clear that the column is filled with integers then this should be more efficient.

                                        Q Offline
                                        Q Offline
                                        qualitychecker
                                        wrote on last edited by
                                        #28

                                        Nice (and compact) solution !! Still depends on the precedence priorities of the language / the optimization of the underlaying compiler .. More safe and maintainable code: ------------------------------------ bool res = false; if (null == dt) else if (null == dt.Rows) else if (dt.Rows.Count < 0) else res = (1 == (int)dt.Rows[0]["Number"]); return res; ------------------------------------ Rules to be applied : (1) : prevent against '=' instead of '==' : always put constants first (2) : always control potential nulls even if seems useless versus construction rules (ex null == dt.Rows) (3) : provide debugging / tracing points in case of future problems (4) : write readable code (5) : single return output point Shears and happy new year.

                                        modified on Saturday, January 10, 2009 5:03 AM

                                        P D U T A 5 Replies Last reply
                                        0
                                        • Q qualitychecker

                                          Nice (and compact) solution !! Still depends on the precedence priorities of the language / the optimization of the underlaying compiler .. More safe and maintainable code: ------------------------------------ bool res = false; if (null == dt) else if (null == dt.Rows) else if (dt.Rows.Count < 0) else res = (1 == (int)dt.Rows[0]["Number"]); return res; ------------------------------------ Rules to be applied : (1) : prevent against '=' instead of '==' : always put constants first (2) : always control potential nulls even if seems useless versus construction rules (ex null == dt.Rows) (3) : provide debugging / tracing points in case of future problems (4) : write readable code (5) : single return output point Shears and happy new year.

                                          modified on Saturday, January 10, 2009 5:03 AM

                                          P Offline
                                          P Offline
                                          PIEBALDconsult
                                          wrote on last edited by
                                          #29

                                          qualitychecker wrote:

                                          Still depends on the precedence priorities of the language

                                          Uh, yeah, so? Are we going to get into that again?

                                          qualitychecker wrote:

                                          always put constants first

                                          If you can remember to do that, you're smart enough not to make that mistake in the first place.

                                          qualitychecker wrote:

                                          provide debugging / tracing points in case of future problems

                                          No thanks.

                                          L 1 Reply Last reply
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