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Concerning If Then/If Then Else...

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#1 money



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Posted 10 October 2011 - 06:25 PM

A reply to this topic regarding "If Then vs. If Then Endif": which belongs on a entirely topic:


Results: Variable [pun intended]

Global $eatit, $choice, $stop_watch, $cheese = 1, $laps = 10000 Global $winner[2] = [100000000, 0], $rat[4] = [0,0,0,0], $names[4] = ["If then","If Then EndIf","Switch","Select"] ConsoleWrite("The mouse are asleep, releasing the cheese " &@LF) ConsoleWrite("The cheese is being tested: ") $eatit = TimerInit() ;WARMUP For $i = 1 To 10     Sleep(10)     If $cheese = $cheese Then $cheese = $cheese     If $cheese = $cheese Then         $cheese = $cheese     EndIf     Switch $cheese         Case $cheese             $cheese = $cheese     EndSwitch     Select         Case $cheese = $cheese             $cheese = $cheese     EndSelect Next ConsoleWrite("FDA Approved" &@LF) $choice = InputBox("Pick the winning rat", StringFormat("0 = If then\r\n1 = If Then EndIf\r\n2 = Switch\r\n3 = Select"), 0) ConsoleWrite(@lf& "Setting race: 4 Contestants after " & $cheese & " cheese for "& $laps & " laps" &@lf) For $i = 1 To $laps     ;=============================     ; if then     $stop_watch = TimerInit()     If $cheese = 1 Then $cheese = 1     $rat[0] += TimerDiff($stop_watch)     ;=============================     ; if then endif     $stop_watch = TimerInit()     If $cheese = 1 Then         $cheese = 1     EndIf     $rat[1] += TimerDiff($stop_watch)     ;=============================     ; switch     $stop_watch = TimerInit()     Switch $cheese         Case 1             $cheese = 1     EndSwitch     $rat[2] += TimerDiff($stop_watch)     ;=============================     ; select     $stop_watch = TimerInit()     Select         Case $cheese = 1             $cheese = 1     EndSelect     $rat[3] += TimerDiff($stop_watch) Next $eatit = TimerDiff($eatit) ConsoleWrite(@lf& "+ the results are in!!!" &@lf) ConsoleWrite( "> ========================================================================" &@lf) ConsoleWrite( "> "& $names[0] &": "&@TAB&  "avg: "& Round($rat[0] / $laps, 15) &", total: "& Round($rat[0],15) &@lf) ConsoleWrite( "> "& $names[1] &": "&@TAB&  "avg: "& Round($rat[1] / $laps, 15) &", total: "& Round($rat[1],15) &@lf) ConsoleWrite( "> "& $names[2] &": "&@TAB&  "avg: "& Round($rat[2] / $laps, 15) &", total: "& Round($rat[2],15) &@lf) ConsoleWrite( "> "& $names[3] &": "&@TAB&  "avg: "& Round($rat[3] / $laps, 15) &", total: "& Round($rat[3],15) &@lf) ConsoleWrite( "> ========================================================================" &@lf) ConsoleWrite( "+ ...and the winner was: " ) For $i = 0 To UBound($rat)-1     If $rat[$i] < $winner[0] Then         $winner[0] = $rat[$i]         $winner[1] = $i     EndIf Next ConsoleWrite( StringUpper( $names[$winner[1]]) & @lf) If $winner[1] = $choice Then     ConsoleWrite("+Good choice, you picked the right rat!" & @lf) Else     ConsoleWrite("Better luck next time." & @lf) EndIf ConsoleWrite("> Notice: A total of " & (Round($eatit,4)) &" ms could been taken to EAT the cheese!" &@lf)

#2 BrewManNH


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Posted 10 October 2011 - 07:11 PM

Interesting results, but skewed.

If you add the line $cheese = Not $cheese just after the line For $i = 1 To $laps you will probably see very different results. By toggling between 1 and 0 (True and False), the results jump all over the 4 different choices and the differences are so small as to be negligible.

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#3 Ascend4nt



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Posted 11 October 2011 - 01:53 AM

BrewMan is correct here. True/False conditions cause the results to be different.

For example, if $a=1 then
If $a Then $a=1

is slower than
If $a Then $a=1 EndIf

yet, where $a=0,
If $a Then $a=0

is faster than
If $a Then $a=0 EndIf

Edited by Ascend4nt, 11 October 2011 - 01:53 AM.

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