DiegoRibeiro

<?xml version="1.0" encoding="Windows-1252"?>
<NotepadPlus>
  <AutoComplete language="lua">
    <Environment ignoreCase="no" additionalWordChar=".:"/>
    <KeyWord name="ACCOUNT_TYPE_GAMEMASTER"/>
    <KeyWord name="ACCOUNT_TYPE_GOD"/>
    <KeyWord name="ACCOUNT_TYPE_NORMAL"/>
    <KeyWord name="ACCOUNT_TYPE_SENIORTUTOR"/>
    <KeyWord name="ACCOUNT_TYPE_TUTOR"/>
    <KeyWord name="CALLBACK_PARAM_LEVELMAGICVALUE"/>

DiegoRibeiro

// https://github.com/oozcitak/xmlbuilder-js/wiki/Examples
// https://npp-user-manual.org/docs/auto-completion/
const builder = require('xmlbuilder');
const fs = require('fs');

let c = JSON.parse(fs.readFileSync("constants.json", {encoding: 'utf-8'}).toString());
let f = JSON.parse(fs.readFileSync("functions.json", {encoding: 'utf-8'}).toString());

// merging array
let a = [...c, ...f];