Robin

Most recent activity

• Correct syntax needed for bind() on 'this' object using class

  @Robin started

  • 6 comments
  • 72 views

  @Gordon replied
• Placing module code in local modules folder doesn't appear to be located by Native IDE

  @Robin started

  • 14 comments
  • 187 views

  @Robin replied
• Placing module code in local modules folder doesn't appear to be located by Native IDE

  in General • 14 hours, 15 minutes

  

  Tue 2018.09.18

  @Robin did you try disabling the virus checker and seeing if that helps?

  Yes. Disabled Avast and ran the test again, but had the same output as above #9

• Correct syntax needed for bind() on 'this' object using class

  in JavaScript • 15 hours, 18 minutes

  

  Tue 2018.09.18

  Thanks both for the quick and attentive responses.

  I thought I'd found the culprit. I mistakenly used tb.setX = 42; when as @Gordon pointed out should use tb.setX(42);

  Note line #6 that shows the class contents aren't getting updated

  But when I run that tb.setX(42);, I'm faced with yet another error:

  >var tb = new TestBind();
  =TestBind: { "vX": 25 }
  =25
  >tb.setX = 42;
  =42
  >print tb.getX();
  =25
  >var bg = g.bind(tb);
  Uncaught Error: Function "bind" not found!
   at line 1 col 12
  var bg = g.bind(tb);
             ^
  >print bg
  =undefined
  >tb.setX(42);
  Uncaught Error: Expecting a function to call, got Number
   at line 1 col 4
  tb.setX(42);
     ^
  >
  

  This is why I originally used the syntax tb.setX = 42; to avoid the 'Expecting a function to call' error

• Correct syntax needed for bind() on 'this' object using class

  in JavaScript • 1 day, 4 hours

  

  Mon 2018.09.17

  ref MDN bind(): https://developer.mozilla.org/en-US/docs­/Web/JavaScript/Reference/Global_Objects­/Function/bind

  Goal:
  1) Retrieve the internal contents of an instantiated class
  2) Modify the internal value and retain through subsequent retrieval attempts

  The MDN example works using the Json object notation form. When I attempt to use a class however, I'm greeted with either function not found or undefined

  class TestBind {
  
    constructor() {
  //    var vX = -1;
      var vX = 23;
    }
   
    getX() { 
      return this.vX; 
    }
  
    setX( obj ) {
      this.vX = obj;
    }
  
  }
  exports = TestBind;
  

  
  

  The constructor seems to ignore the initial default assignment - why not -1

  var tb = new TestBind();
  var g = tb.getX;
  print g
  
  Undefined
  

  
  

  Then if I use a setter, then it's not clear if the constructor initialized correctly

  var tb = new TestBind();
  tb.setX = 42;
  var g = tb.getX;
  print g
  
  =42
  

  
  

  
  

  If I use the () notation - so which is correct, without the () or using the () ?
  How can function getX() not be found when it is clearly defined?

  var tb = new TestBind();
  var g = tb.getX();
  print g
  
  Uncaught Error: Function "getX" not found!
  

  
  

  Following the example from MDN, and applying to this class

  var tb = new TestBind();
  //tb.setX = 42;
  //var g = tb.getX;
  var g = tb.getX();
  print g
  var bg = g.bind(tb);
  print bg
  

  var bg = g.bind(tb);
  Uncaught Error: Cannot read property 'bind' of undefined
  

  
  
  VERSION 1v99

• relay shield for pixl.js?

  in Puck.js, Pixl.js and MDBT42 • 2 days, 4 hours

  

  Sun 2018.09.17

  @d0773d, are you in it for the quick and easy, or are you up for a minor technical challenge and learning experience?

  @allObjects created a nice post on connecting relays using two separate methods:

  Quick Start Best Practices - Connecting a relay using isolation - optocoupler - 2 Relay Board Module
  
  

  EDIT:
  Just noticed you posted the original Pico flavor for a 2 relay module

• Using uploaded software offline

  in ESP8266 • 2 days, 13 hours

  

  Sun 2018.09.16

  Hello @user94069 George,

  Sometimes knowing which rock to turn over will speed up the learning process. The key was in this line:

  'it doesnt work. But once i open up Espruino IDE and click "Send to Espruino", it works again.'

  Just so happens I remembered I had turned over that same rock a while back.

  It takes quite a bit of time to learn all the nuances of a new environment and sometimes staring at the same code for hours on end, blocks the insight to get over the finish line. Don't be so hard on yourself.

  I'm glad you found success with an easy fix.

• New Murata lora chip with integrated STM32

  in Porting to new Devices • 3 days, 19 hours

  

  Sat 2018.09.15

  re: ' but I think the things I wanted is in the official repo'

  @larry, aren't you seeking to code what a module will do,

  http://www.espruino.com/FAQ#how-do-modul­es-work-

  http://www.espruino.com/Modules

  much simpler, and with Javascript, rather than starting at rebuilding the core?

  http://www.espruino.com/Internals

• New Murata lora chip with integrated STM32

  in Porting to new Devices • 4 days, 6 hours

  

  Fri 2018.09.14

  Hello @larry,

  re: 'how can I try to achieve this?'

  Did you take a peek at the actual RN2483 module code?

  http://www.espruino.com/modules/RN2483.j­s

  This is on the order of what would be necessary. Study that and if needed some simpler ones to get an idea:

  http://www.espruino.com/modules/
  http://www.espruino.com/modules/Ping.js
  http://www.espruino.com/modules/GroveRel­ay.js

  
  
  Pick a tutorial with which you have some familiarity and check out that code
  https://www.espruino.com/Tutorials

• Using uploaded software offline

  in ESP8266 • 4 days, 7 hours

  

  Fri 2018.09.14

  Hello @user94069 George,

  Are you remembering save before disconnect?

  http://www.espruino.com/Saving
  
  
  What does your startup init function look like?

  http://www.espruino.com/Reference#l_E_in­it

  
  
  http://www.espruino.com/Quick+Start+Code­
  http://www.espruino.com/FAQ
  http://www.espruino.com/Quick+Start+USB