Re: Logical conundrums if () else if()

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From	Soviet_Mario <SovietMario@CCCP.MIR>
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Subject	Re: Logical conundrums if () else if()
Date	Sun, 19 Jan 2020 01:22:12 +0100
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On 18/01/20 21:06, Soviet_Mario wrote:
> On 28/12/19 09:40, Jonas Thörnvall wrote:
>> How can two if statements that work perfectly standalone 
>> as single statments.
>> Make outcome that differs when you put in, an else if 
>> statement to only execute one of them. The below 
>> statements have the statement with heavier conditioning 
>> first so not the second statement gets executed. Because 
>> both satisfy the noneboolean condition.
>>
>> I probably done some very no no thingy.
>>
>>
>>
>> if (EDITEND<SELEND && 
>> document.getElementById("lockedit").checked){
>>    SELLENGTH=SELEND-SELSTART;
>>    document.getElementById("SB").value=EDITSTART+SELLENGTH;
>>    document.getElementById("EB").value=SELEND;
>> } else if (EDITEND<SELEND){ 
>> document.getElementById("EB").value=SELEND;}
>>
> 
> do you have the rock solid warranty that none of the 
> statements/function calls MODIFIES the internal status of 
> the objects probed ?
> If somewhere sth gets changed by the inquiry, the order 
> could become relevant.
> 
> a trivial example of what I mean
> 
> int q, k = 0;
> if (k == 0) q = 0; else if (++ k != 0) q = 1;
> if (++ k != 0) q = 0; else if (k == 0) q = 1;
> 
> the state of q depends on the order the two tests on k are 
> executed.
> 
> maybe getElementById alters sth ... dunno ...
> 
> 

sorry I am in the wrong NG :( I thought I was reading C++ NG 
... the syntax is similar at times


-- 
1) Resistere, resistere, resistere.
2) Se tutti pagano le tasse, le tasse le pagano tutti
Soviet_Mario - (aka Gatto_Vizzato)

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Logical conundrums if () else if() Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-12-28 00:40 -0800
  Re: Logical conundrums if () else if() "R.Wieser" <address@not.available> - 2019-12-28 12:21 +0100
    Re: Logical conundrums if () else if() Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-12-28 05:32 -0800
      Re: Logical conundrums if () else if() "R.Wieser" <address@not.available> - 2019-12-28 19:10 +0100
        Re: Logical conundrums if () else if() Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-12-28 12:16 -0800
          Re: Logical conundrums if () else if() "R.Wieser" <address@not.available> - 2019-12-29 08:52 +0100
          Re: Logical conundrums if () else if() Arno Welzel <usenet@arnowelzel.de> - 2019-12-30 21:35 +0100
            Re: Logical conundrums if () else if() Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-12-30 12:42 -0800
  Re: Logical conundrums if () else if() "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-12-28 09:37 -0800
    Re: Logical conundrums if () else if() Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2019-12-29 11:43 +0100
      Re: Logical conundrums if () else if() "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-12-29 08:14 -0800
  Re: Logical conundrums if () else if() Soviet_Mario <SovietMario@CCCP.MIR> - 2020-01-18 21:06 +0100
    Re: Logical conundrums if () else if() Soviet_Mario <SovietMario@CCCP.MIR> - 2020-01-19 01:22 +0100

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