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Re: A proposition for a conditional loop.

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Den fredag 27 september 2019 kl. 21:23:35 UTC+2 skrev Ben Bacarisse:
> Jonas Thörnvall <jonas.thornvall@gmail.com> writes:
> <cut>
> > compare with
> >
> >    while(z<nbrOfEV){
> >                   if(track[rectrack].midiMess[z].data1==track[rectrack].midiMess[midiEv].data1){
> >                         ctm.fillStyle = "#000a4d";
> >                         ctm.fillRect(scrollBarPos-BACKOFFSET[midiEv]-5,(PistartX+keyHeight*88)-(keyHeight*(track[rectrack].midiMess[midiEv].data1-8))-1,barLength[midiEv]+50 ,keyHeight+2);
> >                         ctm.fillStyle = pcolor[track[rectrack].midiMess[midiEv].data1];
> >                         ctm.fillRect(scrollBarPos-BACKOFFSET[midiEv],(PistartX+keyHeight*88)-(keyHeight*(track[rectrack].midiMess[midiEv].data1-8)), barLength[midiEv]+50,keyHeight);
> >                         
> >                         break;
> >                   }
> >                 z++;
> >                 }
> >            }
> 
> One way to do a search for an element is with Array.prototype.find or
> similar, but the logic of your example looks very odd, so this soer of
> search may not be what you are really doing.
> 
> The odd part is that the block of code does not use the element found
> but the one being tested against.  If midiEv is < nbrOfEV, then a
> matching z certainly will be found.  It might be some z < midiEv but it
> will be no later than when z == midiEv.  But in both cases (z < midiEv
> and z == midiEv), the body of the 'if' does the same thing.  So,
> provided z starts at 0, you are really only testing
> 
>   if (midiEv < nbrOfEV) { ... }
> 
> Whats more, if nbrOfEV is what is sounds like (the size of the array)
> then that test will always be true and you don't need any of this code.
> 
> -- 
> Ben.

I think you understand the problem wrong Ben but i am not sure, z and nbrOfEv is just positions in a stack/array.

midimess[z] and midimess[nbrOfEv] is the elements "data1" to match.
I do use z to position myself favourly in array because i know "data1" note on will always come before note off. "data1 is the note value" can hold boths.Then i simply increment z to both match.

So in the sequense of note values a data/note on *must* be followd of a data/note off.

I am not sure i think you missunderstood ask John he seem to understand the element match and increment.

Or think of yourself positioning yourself favourly in the stack "the on note" and looking forward "for the off note"

I paint alot of notes and starting with key push one, but that does not mean that key push two is the corresponding off note. You can push alot of keys between and of course you can press same key on and off more then once.

But one thing is true for a ceratain note lets say A! pushed/note on, that specific note A1 must have a note off following.

Basicly it is the same like have 128 light switches that you can press in any order. One thing always remain true you can not turn it on same switch twice "then something really wrong", you have to turn it off before you turn it on again.

I hope that explain what i am doing "recording keystrokes" and "key releases" in realtime and rendering the length of them relative the clock metronome using "bars" of the beat per minute length.

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Thread

A proposition for a conditional loop. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-23 00:55 -0700
  Re: A proposition for a conditional loop. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-23 01:05 -0700
    Re: A proposition for a conditional loop. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-23 01:14 -0700
      Re: A proposition for a conditional loop. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-23 01:16 -0700
        Re: A proposition for a conditional loop. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-24 05:12 -0700
  Re: A proposition for a conditional loop. "R.Wieser" <address@not.available> - 2019-09-24 22:27 +0200
    Re: A proposition for a conditional loop. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-24 22:39 -0700
      Re: A proposition for a conditional loop. "R.Wieser" <address@not.available> - 2019-09-25 09:05 +0200
        Re: A proposition for a conditional loop. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-25 02:47 -0700
          Re: A proposition for a conditional loop. "R.Wieser" <address@not.available> - 2019-09-25 13:13 +0200
            Re: A proposition for a conditional loop. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-25 05:13 -0700
              Re: A proposition for a conditional loop. "R.Wieser" <address@not.available> - 2019-09-25 15:04 +0200
                Re: A proposition for a conditional loop. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-25 06:10 -0700
                Re: A proposition for a conditional loop. John G Harris <niam@jghnorth.org.uk.invalid> - 2019-09-25 15:50 +0100
                Re: A proposition for a conditional loop. Tim Streater <timstreater@greenbee.net> - 2019-09-25 16:00 +0100
                Re: A proposition for a conditional loop. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-25 10:20 -0700
                Re: A proposition for a conditional loop. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-25 10:26 -0700
                Re: A proposition for a conditional loop. John G Harris <niam@jghnorth.org.uk.invalid> - 2019-09-25 19:18 +0100
                Re: A proposition for a conditional loop. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-25 12:19 -0700
                Re: A proposition for a conditional loop. John G Harris <niam@jghnorth.org.uk.invalid> - 2019-09-26 10:48 +0100
                Re: A proposition for a conditional loop. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-26 04:38 -0700
                Re: A proposition for a conditional loop. John G Harris <niam@jghnorth.org.uk.invalid> - 2019-09-26 18:05 +0100
                Re: A proposition for a conditional loop. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-26 10:54 -0700
                Re: A proposition for a conditional loop. John G Harris <niam@jghnorth.org.uk.invalid> - 2019-09-27 10:06 +0100
                Re: A proposition for a conditional loop. dr.j.r.stockton@gmail.com - 2019-09-27 02:34 -0700
                Re: A proposition for a conditional loop. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-27 05:32 -0700
                Re: A proposition for a conditional loop. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-27 05:36 -0700
                Re: A proposition for a conditional loop. Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-09-27 20:23 +0100
                Re: A proposition for a conditional loop. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-27 12:45 -0700
                Re: A proposition for a conditional loop. Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-09-27 22:05 +0100
                Re: A proposition for a conditional loop. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-27 14:39 -0700
                Re: A proposition for a conditional loop. Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-09-28 00:16 +0100
                Re: A proposition for a conditional loop. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-27 17:10 -0700
                Re: A proposition for a conditional loop. "R.Wieser" <address@not.available> - 2019-09-28 17:28 +0200
                Re: A proposition for a conditional loop. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-28 11:34 -0700
                Re: A proposition for a conditional loop. "R.Wieser" <address@not.available> - 2019-09-28 22:23 +0200
                Re: A proposition for a conditional loop. Tim Streater <timstreater@greenbee.net> - 2019-09-28 21:42 +0100
                Re: A proposition for a conditional loop. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-29 07:40 -0700
                Re: A proposition for a conditional loop. "R.Wieser" <address@not.available> - 2019-09-29 18:33 +0200
                Re: A proposition for a conditional loop. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-29 09:58 -0700
                Re: A proposition for a conditional loop. John G Harris <niam@jghnorth.org.uk.invalid> - 2019-09-29 19:18 +0100
                Re: A proposition for a conditional loop. "R.Wieser" <address@not.available> - 2019-09-29 21:02 +0200
                Re: A proposition for a conditional loop. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-29 13:54 -0700
                Re: A proposition for a conditional loop. John G Harris <niam@jghnorth.org.uk.invalid> - 2019-09-28 10:41 +0100
                Re: A proposition for a conditional loop. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-27 13:17 -0700
                Re: A proposition for a conditional loop. Tim Streater <timstreater@greenbee.net> - 2019-09-27 13:41 +0100
                Re: A proposition for a conditional loop. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-27 06:01 -0700
                Re: A proposition for a conditional loop. Tim Streater <timstreater@greenbee.net> - 2019-09-27 14:03 +0100
                Re: A proposition for a conditional loop. John G Harris <niam@jghnorth.org.uk.invalid> - 2019-09-27 19:23 +0100
                Re: A proposition for a conditional loop. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-27 12:06 -0700
                Re: A proposition for a conditional loop. John G Harris <niam@jghnorth.org.uk.invalid> - 2019-09-28 14:43 +0100
                Re: A proposition for a conditional loop. John G Harris <niam@jghnorth.org.uk.invalid> - 2019-09-25 21:47 +0100
                Re: A proposition for a conditional loop. John G Harris <niam@jghnorth.org.uk.invalid> - 2019-09-26 10:49 +0100
                Re: A proposition for a conditional loop. "R.Wieser" <address@not.available> - 2019-09-25 17:07 +0200

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