<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class=""><div style="background-color: rgb(255, 255, 255); font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 16px;" class=""><div id="yui_3_16_0_ym19_1_1487041205021_31155" class="">Bob, </div><div id="yui_3_16_0_ym19_1_1487041205021_31226" class=""><br class=""></div><div id="yui_3_16_0_ym19_1_1487041205021_31154" class="">If you remove all methods from your world, then Alice will remove the whole editor section (including the bottom control bar). You do not need to remove the "my first method", just close it to avoid the warning message that it is not being used anywhere in the program.<br class=""></div><div id="yui_3_16_0_ym19_1_1487041205021_31128" class=""><span class=""><br class=""></span></div><div id="yui_3_16_0_ym19_1_1487041205021_31370" class=""><span id="yui_3_16_0_ym19_1_1487041205021_31371" class="">We are looking at keeping the command bar present in those cases. </span></div><div id="yui_3_16_0_ym19_1_1487041205021_31370" class=""><span class=""><br class=""></span></div><div id="yui_3_16_0_ym19_1_1487041205021_31385" class=""><span id="yui_3_16_0_ym19_1_1487041205021_31371" class=""></span></div><div id="yui_3_16_0_ym19_1_1487041205021_31129" class="">Regards, <br class=""></div><div class="signature" id="yui_3_16_0_ym19_1_1487041205021_31130">Aik Min Choong</div><div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1487041205021_31131"><br class=""><br class=""></div><div class="yahoo_quoted" id="yui_3_16_0_ym19_1_1487041205021_31136" style="display: block;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_ym19_1_1487041205021_31135" class=""> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_ym19_1_1487041205021_31134" class=""> <div dir="ltr" id="yui_3_16_0_ym19_1_1487041205021_31133" class=""> <font id="yui_3_16_0_ym19_1_1487041205021_31132" size="2" face="Arial" class=""> <hr size="1" class=""> <b class=""><span style="font-weight:bold;" class="">From:</span></b> Donald Slater <<a href="mailto:djslater107@mac.com" class="">djslater107@mac.com</a>><br class=""> <b class=""><span style="font-weight: bold;" class="">To:</span></b> Alice Teachers <<a href="mailto:alice-teachers@lists.andrew.cmu.edu" class="">alice-teachers@lists.andrew.cmu.edu</a>> <br class=""><b class=""><span style="font-weight: bold;" class="">Cc:</span></b> Aik Min <<a href="mailto:aik_min@yahoo.com" class="">aik_min@yahoo.com</a>><br class=""> <b class=""><span style="font-weight: bold;" class="">Sent:</span></b> Monday, February 13, 2017 11:11 PM<br class=""> <b class=""><span style="font-weight: bold;" class="">Subject:</span></b> Re: alice-teacher Major flaw in Alice 2<br class=""> </font> </div> <div class="y_msg_container" id="yui_3_16_0_ym19_1_1487041205021_31156"><br class=""><div id="yiv5539134598" class=""><div id="yui_3_16_0_ym19_1_1487041205021_31241" class="">This is interesting and thank you for bringing this to our attention… I am unable to recreate this at the moment… Would it be possible to send to me directly (<a rel="nofollow" ymailto="mailto:dslater@cmu.edu" target="_blank" href="mailto:dslater@cmu.edu" class="yiv5539134598">dslater@cmu.edu</a>) a copy of the world where this has happened?<div class="yiv5539134598" id="yui_3_16_0_ym19_1_1487041205021_31249"><br class="yiv5539134598"></div><div class="yiv5539134598">What version of Alice, computer OS, you are using?</div><div class="yiv5539134598" id="yui_3_16_0_ym19_1_1487041205021_31242"><br class="yiv5539134598"></div><div class="yiv5539134598" id="yui_3_16_0_ym19_1_1487041205021_31243">Thank you,</div><div class="yiv5539134598" id="yui_3_16_0_ym19_1_1487041205021_31244">Don Slater</div><div class="yiv5539134598" id="yui_3_16_0_ym19_1_1487041205021_31245"><br class="yiv5539134598"></div><div class="yiv5539134598" id="yui_3_16_0_ym19_1_1487041205021_31336"><br class="yiv5539134598"><div id="yui_3_16_0_ym19_1_1487041205021_31335" class=""><blockquote type="cite" class="yiv5539134598" id="yui_3_16_0_ym19_1_1487041205021_31334"><div class="yiv5539134598">On Feb 12, 2017, at 9:16 PM, robert durtschi via alice-teachers <<a rel="nofollow" ymailto="mailto:alice-teachers@lists.andrew.cmu.edu" target="_blank" href="mailto:alice-teachers@lists.andrew.cmu.edu" class="yiv5539134598">alice-teachers@lists.andrew.cmu.edu</a>> wrote:</div><br class="yiv5539134598Apple-interchange-newline"><div class="yiv5539134598" id="yui_3_16_0_ym19_1_1487041205021_31333"><div id="yiv5539134598divtagdefaultwrapper" dir="ltr" style="font-style:normal;font-weight:normal;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;font-size:12pt;font-family:Calibri, Arial, Helvetica, sans-serif;" class="yiv5539134598"><div style="margin-top:0px;margin-bottom:0px;" class="yiv5539134598"><font class="yiv5539134598" size="2">Rare but annoying when it happens.</font></div><div style="margin-top:0px;margin-bottom:0px;" class="yiv5539134598" id="yui_3_16_0_ym19_1_1487041205021_31332"><font class="yiv5539134598" id="yui_3_16_0_ym19_1_1487041205021_31331" size="2">We are doing an Alice world where we are using events to control a seaplane. There is no need for anything but events, so for a change I immediately deleted 'my first method' from "when the world starts" and changed the event to "while the world is running, during: seaplane move forward 1 meter.<span class="yiv5539134598Apple-converted-space"> </span><br class="yiv5539134598"></font></div><div style="margin-top:0px;margin-bottom:0px;" class="yiv5539134598"><font class="yiv5539134598" size="2">Later in the exercise we added a speed control:</font></div><div style="margin-top:0px;margin-bottom:0px;" class="yiv5539134598"><font class="yiv5539134598" size="2"> create a Seaplane properties variable called "speed"</font></div><div style="margin-top:0px;margin-bottom:0px;" class="yiv5539134598"><font class="yiv5539134598" size="2"> replace the 1 meter in "seaplane move forward 1 meter" with "speed meters"<br class="yiv5539134598"></font></div><div style="margin-top:0px;margin-bottom:0px;" class="yiv5539134598"><font class="yiv5539134598" size="2"> choose two "when a key is pressed" 'A' and 'D' to "increment speed by 1" (Accelerate) and "decrement speed by 1" (Decelerate).<span class="yiv5539134598Apple-converted-space"> </span><br class="yiv5539134598"></font></div><div style="margin-top:0px;margin-bottom:0px;" class="yiv5539134598"><font class="yiv5539134598" size="2"> We needed a guard check to keep speed from going negative: "if speed > 0" decrement speed by 1<br class="yiv5539134598"></font></div><div style="margin-top:0px;margin-bottom:0px;" class="yiv5539134598"><font class="yiv5539134598" size="2"><br class="yiv5539134598"></font></div><div style="margin-top:0px;margin-bottom:0px;" class="yiv5539134598"><font class="yiv5539134598" size="2">That's when I realized that the 'universal' commands at the bottom of the edit window, including the if/else had disappeared along with the edit window for the "my first method" I created a method long enough to get the if/else back then deleted it again.</font></div><div style="margin-top:0px;margin-bottom:0px;" class="yiv5539134598"><font class="yiv5539134598" size="2"><br class="yiv5539134598"></font></div><div style="margin-top:0px;margin-bottom:0px;" class="yiv5539134598"><font class="yiv5539134598" size="2">Bob Durtschi<br class="yiv5539134598"></font></div><div style="margin-top:0px;margin-bottom:0px;" class="yiv5539134598"><font class="yiv5539134598" size="2"></font><br class="yiv5539134598"></div></div><span style="font-family:Helvetica;font-size:14px;font-style:normal;font-weight:normal;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;float:none;display:inline;" class="yiv5539134598">_______________________________________________</span><br style="font-family:Helvetica;font-size:14px;font-style:normal;font-weight:normal;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;" class="yiv5539134598"><span style="font-family:Helvetica;font-size:14px;font-style:normal;font-weight:normal;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;float:none;display:inline;" class="yiv5539134598">alice-teachers mailing list</span><br style="font-family:Helvetica;font-size:14px;font-style:normal;font-weight:normal;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;" class="yiv5539134598"><a rel="nofollow" ymailto="mailto:alice-teachers@lists.andrew.cmu.edu" target="_blank" href="mailto:alice-teachers@lists.andrew.cmu.edu" style="font-family:Helvetica;font-size:14px;font-style:normal;font-weight:normal;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;" class="yiv5539134598">alice-teachers@lists.andrew.cmu.edu</a><br style="font-family:Helvetica;font-size:14px;font-style:normal;font-weight:normal;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;" class="yiv5539134598"><a rel="nofollow" target="_blank" href="https://lists.andrew.cmu.edu/mailman/listinfo/alice-teachers" style="font-family:Helvetica;font-size:14px;font-style:normal;font-weight:normal;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;" class="yiv5539134598">https://lists.andrew.cmu.edu/mailman/listinfo/alice-teachers</a></div></blockquote></div><br class="yiv5539134598"></div></div></div><br class=""><br class=""></div> </div> </div> </div></div></div></body></html>