Elseif Is Broken

Question

@DJ, The ElseIf is broken: The code below never stops !
 $buffer="[123 456 789]" $len=Length($buffer) $ix=0 $start=-1 $end=-1 repeatwhile($ix&lt;$len) $ch=GetCharAt($buffer, $ix) if ($ch="[") print("found start") $start=$ix elseif ($start&gt;=0 AND $ch="]") print("found end") $end=$ix # break $ix=$len+1 endif print("increment ix") $ix=$ix+1 endrepeatwhile print($ix) print($start) print($end)

if you remove the ElseIf it works as expected.
 $buffer="[123 456 789]" $len=Length($buffer) $ix=0 $start=-1 $end=-1 repeatwhile($ix&lt;$len) $ch=GetCharAt($buffer, $ix) if ($ch="[") print("found start") $start=$ix endif if ($start&gt;=0 AND $ch="]") print("found end") $end=$ix # break $ix=$len+1 endif print("increment ix") $ix=$ix+1 endrepeatwhile print($ix) print($start) print($end)

This bug must be recent, i've used before the ElseIf, or did i miss something ?

faengelm · Answer

Does the ElseIf require its own EndIf? This is one thing I've never been clear ablout EZ Script as other languages do require that but EZ Script doesn't seem to require it

ptp · Answer

@faengelm: No. Only one Endif for the If clause. Tutorial: https://synthiam.com/Community/Tutorials/134/1 Quote: other languages do require  Some languages have optional code blocks and don't need the endif: C, C#, Java  TSQL: Begin ... End Python uses indentation and sometimes is a pin a neck (tab vs spaces):
 if expression1: statement(s) elif expression2: statement(s) elif expression3: statement(s) else: statement(s)

Curiosity, what program language do you have in mind that requires 2 endifs ?

faengelm · Answer

@ptp You are right. I was confused by the case where instead of an ElseIf there is an Else with a nested If ... Endif

faengelm · Answer

Hi @PTP I tried the simplest If ElseIF EndIf I could think of and this is working both trying $a=1 and $a=2
 $a=2 :loop if ($a=1) Print( "$a= " + $a) elseif ($a=2) Print( "$a= " + $a) endif Sleep( 2000 ) Goto(loop)

I'm using ARC 2017.05.14 Maybe the ElseIf issue has been fixed Regards, Frank

ptp · Answer

Frank: Did you tried my code and is working for you ? I just tried my code with the new version and the bug is still present. Simple example 2 (broken):
 $a=11 print("Start") if ($a=1) print("one") elseif ($a=3) print("three") elseif ($a=5) print("five") endif print("End")

output: script does not stop and keeps printing "Start". Simple example 3 (broken) WORKING:
 $a=11 print("***Start") if ($a=1) print("one") ELSEif ($a=3) print("three") ELSEif ($a=5) print("five") ELSE print("another number") endif print("End")

output: Start ***Start another number End #EDIT: This example works, Start is not duplicated, i confused the second start with ARC Start

Dave Schulpius · Answer

Nevermind

ptp · Answer

Frank: didn't took me long to break your code
 $a=3 :loop print("before") if ($a=1) Print( "$a= " + $a) ELSEif ($a=2) Print( "$a= " + $a) endif print("after") Sleep( 2000 ) Goto(loop)

The code above is broken

Dunning-Kruger · Answer

I can confirm what @ptp is saying... None of his examples seem to work...

ptp · Answer

@Richard R: Last version ?

Dunning-Kruger · Answer

I am using the latest version of ARC (ARC Version 2017.05.14.00)

DJ Sures · Answer

I'll take a look

faengelm · Answer

@ptp You are right! I forgot to check the boundary conditions.. $A=3 breaks it with the latest ARC I get the same "Start" message that you do  Thanks, Frank

DJ Sures · Answer

$a=11 print("Start") if ($a=1) print("one") ELSEif ($a=3) print("three") ELSEif ($a=5) print("five") ELSE print("another number") endif print("End")

Outputs (correct): Quote: Start Start another number End Done (00:00:00.0156256)  ----------------------------------------------------------------------------------------------
 $a=3 print("Start") if ($a=1) print("one") ELSEif ($a=3) print("three") ELSEif ($a=5) print("five") ELSE print("another number") endif print("End")

Outputs (correct): Quote: Start Start three End Done (00:00:00.0155859)  ------------------------------------------------------------------------------------------------------
 $a=5 print("Start") if ($a=1) print("one") ELSEif ($a=3) print("three") ELSEif ($a=5) print("five") ELSE print("another number") endif print("End")

Outputs (correct): Quote: Start Start five End Done (00:00:00)

ptp · Answer

@DJ, It's fixed in your version ? Current version does not work.

DJ Sures · Answer

I'm using the same version as you. Your examples are all incorrect - surprised none of you caught any of the incorrectness If you copy and paste my code into your copy of ARC, you will receive the same output. Copy and paste, do not type it because there's lots of mistakes being made in this thread example code. Such as the $a=11 lol

ptp · Answer

@DJ: What is the mistake in the code below ?
 $a=11 print("***Start") if ($a=1) print("one") elseif ($a=3) print("three") elseif ($a=5) print("five") endif print("***End")

the code above produces this:

DJ Sures · Answer

Let me take a look and see how this can be... stay tuned

thetechguru · Answer

An IF or ELSEIF needs an ELSE to finish the clause before the ENDIF.

You can make the ELSE do nothing, but it is still required (at least in EZ-Script. Might be implied in some languages).

Not sure this has always been the case, but it is the difference between the failing and the succeeding cases.

Alan

ptp · Answer

@Alan, Quote: An IF or ELSEIF needs an ELSE to finish the clause before the ENDIF.  Not in this tutorial: https://synthiam.com/Community/Tutorials/134/1

thetechguru · Answer

@ptp

Yeah, I edited my post to say I am not sure this has always been the case, but is the difference between the working and failing code. Was to point DJ towards cause of bug, not to say scripts were wrong.

Alan

ptp · Answer

yes i agree with you. it seems the problem is when the condition is false and no else is found. OK:
 print("***Start") $a=1 repeatwhile($a<=9) if ($a=1) Print("1") ELSEif ($a=2) Print("2") ELSEif ($a=3) Print("3") ELSEif ($a<10) Print("less than 10 a="+$a) endif $a=$a+1 ENDrepeatwhile print("***End")

if you change the condition:
 repeatwhile($a<=10)

it get lost forever:

DJ Sures · Answer

Fixed for next release (later tonight)...
 $buffer="[123 456 789]" $start=-1 $end=-1 repeat ($ix, 0, length($buffer) - 1, 1) $ch=GetCharAt($buffer, $ix) if ($ch = "[") print("found start") $start=$ix ELSEif ($ch = "]") print("found end") $end=$ix endif ENDrepeat print($start) print($end)

Outputs: Quote: Start found start found end 0 12 Done (00:00:00.0337752)

DJ Sures · Answer

Here you go: https://synthiam.com/Community/Questions/10370

ptp

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