I dumped an LUT that I generated to a JSON: how do I access its contents after importing it back in?

[VirtualVirgin]

I made an LUT for things I want pre-computed.
I dumped the LUT to a JSON and I can see the data is in there.
When I import the JSON back in to work with it, it comes up as "undefined".

const PCS_LUT = Engine.loadFromJSON("PCS_LUT.json");

How do I "unpack" the contents to use the LUT?

[d.healey]

@VirtualVirgin Use the File/FileSystem APIs to load the JSON as an object.

[VirtualVirgin]

@d-healey said in I dumped an LUT that I generated to a JSON: how do I access its contents after importing it back in?:

@VirtualVirgin Use the File/FileSystem APIs to load the JSON as an object.

Thanks :)

What kind of syntax do I use here?

I'm not quite getting it:

Am I supposed to point to the file in the directory somehow?

[d.healey]

@VirtualVirgin

Yeah so if the file is on your desktop for example you would do this.

const f = FileSystem.getFolder(FileSystem.Desktop).getChildFile("PCS_LUT.json");
const pcsLut = f.loadAsObject();

Now if this json data is something you want to embed in your plugin then instead of loading it as an outside file you should put the contents into a .js file and include it like a regular script.

[VirtualVirgin]

@d-healey Thanks again :)

A couple more questions:

1. I have a hashtag in a folder name in the directory. How do I handle that?
   

2. Instead of dumping my LUT to JSON, importing it and converting to a .js, is there a way to convert my generated LUT directly to a .js file?

[d.healey]

@VirtualVirgin said in I dumped an LUT that I generated to a JSON: how do I access its contents after importing it back in?:

I have a hashtag in a folder name in the directory. How do I handle that?

I would change the folder name, special characters in folder names can be problematic - especially if you work with the commandline. But if you want to keep it I don't think HISE would have a problem with it, I haven't tested though.

@VirtualVirgin said in I dumped an LUT that I generated to a JSON: how do I access its contents after importing it back in?:

Instead of dumping my LUT to JSON, importing it and converting to a .js, is there a way to convert my generated LUT directly to a .js file?

What format does it use? Is it just an array?

[VirtualVirgin]

@d-healey It is an array with filled with objects that contain arrays. The lower-level arrays just contain integers.

[d.healey]

@VirtualVirgin

Just rename the file with a .js extension and assign the array to a variable.

For example if your file is this kind of thing

[
    {someKey:[{anotherKey: data}]},
    {someKey:[{anotherKey: data}]},
    {someKey:[{anotherKey: data}]},
    {someKey:[{anotherKey: data}]},
    ...
]

Do this

namespace Lut
{
    const pcs = [
        {someKey:[{anotherKey: data}]},
        {someKey:[{anotherKey: data}]},
        {someKey:[{anotherKey: data}]},
        {someKey:[{anotherKey: data}]},
        ...
    ]
}

Then you can access it using Lut.pcs