[Newbies] Re: whats the difference between over and through

Wed May 18 13:48:19 UTC 2016

Thanks for all the help.  Thanks for the sample code also.  My debugging is improving.

> On May 17, 2016, at 3:30 PM, Ron Teitelbaum [via Smalltalk] <ml-node+s1294792n4895522h31 at n4.nabble.com> wrote:
> 
> Nice description Herbert!  That reminded me of one extra thing.  It's kind of hidden but very useful. 
> 
> If you need to get out of a loop but don't want to restart and add a halt, you can click on some place in your code then select "Run To Here" from the pop up menu (right click on windows). 
> 
> That will continue your code until it gets to where the cursor is currently located and resume debugging from that location. 
> 
> That's pretty useful too. 
> 
> All the best, 
> 
> Ron 
> 
> > From: Herbert König 
> > Sent: Tuesday, May 17, 2016 4:33 PM 
> > 
> > Hi Joe, 
> > 
> > a practical tip if you debug loops: 
> > 
> > myCollection collect: [:each| "You need 'through' to get into the loop" 
> > 
> >      self doThis. "Through or over are ok here" 
> > 
> >      self doThatWhichTakesLongToRun. "use over to go over this long running 
> > method" 
> > 
> >      somethingElse doMore "here you need to press through again or you'll 
> > learn about the inner workings of collect :-))"] 
> > 
> > I want to mention three things: 
> > 
> > 1- if you are inside a loop with no other block inside you can always 
> > continue with pressing 'Through'. This will then go through the next iteration 
> > of the loop but step over the method sends inside the loop. 
> > Methods inside the loop seem to take much longer if you go over them via 
> > 'through' than if you go over them via 'over'. Especially on slow hardware. 
> > 
> > 2- if by accident you press 'over' while debugging the last send inside a loop 
> > you get to the outer context of your loop which is very confusing at the 
> > beginning. To get back into your loop you have to step 'into' the block you'll 
> > see there. 
> > 
> > 3- if you've seen enough after being 'through' three iterations of of a 
> > 1000 iteration loop you continue one level above (top pane of the 
> > debugger) and debug 'over' that loop. 
> > 
> > Most important : experiment. 
> > 
> > I have no Squeak at hand so take the above just as a coarse description on 
> > what you may encounter on your debugging journey. 
> > 
> > I usually debug my code into life and I still manage to press the wrong 
> > buttons while debugging :-)) 
> > 
> > 
> > Cheers, 
> > 
> > 
> > Herbert 
> > 
> > Am 17.05.2016 um 19:36 schrieb Ron Teitelbaum: 
> > > Hi Joe, 
> > > 
> > > This is a very good question.  It's something that if you been using the 
> > debugger for a long time comes naturally but when you are new it seems 
> > strange. 
> > > 
> > > Take this code for example: 
> > > 
> > > | lock | 
> > > lock := Mutex new. 
> > > lock critical: [Transcript show: 'I am here'] 
> > > 
> > > debug this code and play with the different options to see how this works. 
> > In general there are a number of times where what you want to debug is 
> > inside a block.  Getting into that block can be a real pain.  In many cases you 
> > really just want to say take me through this outer code and into that block 
> > so I can debug what is inside it. (in this case Transcript show: ) 
> > > 
> > > "Over" will skip it and "Into" will take you down the rabbit hole of code 
> > that surrounds it. 
> > > 
> > > In this case try debugging that code using the different options and see 
> > how much easier getting inside that block is when you use Through. 
> > > 
> > > I think the accepted description is: 
> > > Through: if the debugger is going to execute a block, with this button you 
> > can step though this block. 
> > > 
> > > and it makes sense when you think I want to step through what is inside 
> > the block.  "Take me through the inside of this block". 
> > > 
> > > Does that make sense? 
> > > 
> > > All the best, 
> > > 
> > > Ron Teitelbaum 
> > > 
> > >> -----Original Message----- 
> > >> From: [hidden email] [mailto:beginners- 
> > >> [hidden email]] On Behalf Of Joseph Alotta 
> > >> Sent: Tuesday, May 17, 2016 1:07 PM 
> > >> To: [hidden email] 
> > >> Subject: [Newbies] whats the difference between over and through 
> > >> 
> > >> Greetings, 
> > >> 
> > >> What’s the difference between over and through in the debugger? 
> > >> 
> > >> Is there something that goes to the next line of code? 
> > >> 
> > >> 
> > >> Sincerely, 
> > >> 
> > >> Joe. 
> > >> 
> > >> 
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