Uncaught TypeError: Cannot read property 'toLowerCase' of undefined about hydrogen HOT 9 CLOSED

I think this is happening because either 1. Atom doesn't know what language the file you're editing is in, or 2. the kernels you're using don't declare their language.

Does the language show up in the status bar of Atom, like this?

If it does, would you mind updating to the version I just released, then popping open the dev tools and telling me what it says next to "Available kernels" when you try to run something?

from hydrogen.

Yep, I see the same thing in the status bar.

I opened up the dev tools, but don't know how to ask it for "Available Kernels"...

from hydrogen.

Found it:

Available kernels: Array[6]0: 
Objectargv: Array[5]display_name: "R"__proto__: Object1: 
Objectargv: Array[5]display_name: "Julia 0.3.6"language: "julia"__proto__: Object2: 
Objectargv: Array[5]display_name: "Julia 0.3.6"language: "julia"__proto__: Object3: 
Objectargv: Array[5]display_name: "Julia 0.3.8"language: "julia"__proto__: Object4: 
Objectargv: Array[5]display_name: "Julia 0.4.0-dev"language: "julia"__proto__: Object5: 
Objectargv: Array[5]display_name: "Python 3"language: "python"__proto__: Objectlength: 6__proto__: Array[0]

from hydrogen.

@spencerlyon2 I think the issue is that the R kernel isn't giving me a language field. Just pushed a patch — please update and give it a shot, and let me know if it's still broken!

from hydrogen.

That worked! Thanks

from hydrogen.

... well that works for julia and python, but not R.

When I try to run code in an R file it tells me that there is no kernel for r.

Here are the contents of ~/.ipython/kernels/ir/kernel.json:

{"argv": ["R","-e","IRkernel::main()","--args","{connection_file}"],
 "display_name":"R"
}

from hydrogen.

Whoops, forgot to make the other two lines of that change. Update and try it again?

I'm now using the display_name if the kernelspec doesn't declare a language.

from hydrogen.

@takluyver should IRkernel be declaring a language or is that an optional field?

from hydrogen.

Yes, I think we should be declaring a language. The spec changed a couple of times while we were developing IPython 3, and I guess I missed that one.

from hydrogen.