sending code to puck.js causes reset() error

[espruino-discuss]

Posted at 2019-12-19 by dysc

Hi all,

been working with the puck.js for a while now and every now and then I get an error upon loading code (via WebBT/Chrome) to my puck.

It seems to trigger a reset which seems to fail:

Uncaught Error: Expecting a function to call, got Number
at line 1 col 1
reset();
^

See also attached screenshot - this happens even when just loading one line of code to the puck...

(hard-)resetting the puck fixes that for a while, but the issue eventually comes back.

Any ideas?

Attachments:

• Screenshot 2019-12-19 at 10.15.50.png

[espruino-discuss]

Posted at 2019-12-19 by @allObjects

...since the console.log() uses the same and only available 'communication channel' it interferes with the upload... therefore, put your code into a setTimeout() function, or - even better - into 'the' onInit(){ ... } function and add the timeout to the code like this:

function onInit() {
  // your code
}

setTimeout(onInit,999); // while dev, remove before upload for save()

[espruino-discuss]

Posted at 2019-12-20 by dysc

Thanks for explaining the background on the communication channel - seeing this I now understand the reason for the error.

Using your code snippet fixed the error, thanks for that, also!

[gfwilliams]

Posted at 2020-01-06 by @gfwilliams

I'm not sure if this helps, but:

Expecting a function to call, got Number
at line 1 col 1
reset();

would happen if you did something like global.reset=1 which set reset to a number. It seems unlikely that you would have done that however

[espruino-discuss]

Posted at 2020-02-05 by dysc

Thanks for your idea & feedback, Gordon!

This error occurs prior to loading code to the puck, seems to be during the (standard) reset during the upload procedure - AFAIK there was some switch to "disable reset upon code upload" in the Web IDE...

[gfwilliams]

Posted at 2020-02-05 by @gfwilliams

The standard reset procedure involves just calling reset() - so if you had set global.reset=a_number for some reason this is exactly the error you'd get. For example:

>global.reset=1;
=1
>reset()
Uncaught Error: Expecting a function to call, got Number
 at line 1 col 1
reset()
^

[espruino-discuss]

Posted at 2020-02-07 by dysc

Thanks Gordon - that's it! That was the issue - I did have a variable called "reset" which caused this behaviour... Sorry, my bad...
Renaming fixed it - the error is gone - thanks again!

Will now close this thread