How to access class variable inside Promise then() function?

 https://stackoverflow.com/questions/48064389/how-to-access-class-variable-inside-promise-then-function

If you pass a function reference, this won't point to the local class instance anymore.

You can use bind

.then(this.extractData.bind(this))

or arrow functions

.then((res) => this.extractData(res))

to get the desired behavior.

'wmic' is not recognized as an internal or external command, operable program or batch file

 https://superuser.com/questions/1178674/wmic-is-not-recognized-as-an-internal-or-external-command-operable-program-or

This indicates that the wmic utility's directory is not found on your PATH. Open the advanced System Properties window (you can open the System page with Windows+Pause/Break) and on the Advanced tab, click Environment Variables. In the section for system variables, find PATH (or any capitalization thereof). Add this entry to it:

%SystemRoot%\System32\Wbem

Note that entries are delimited by semicolons.

How to completely remove node.js from Windows

 https://stackoverflow.com/questions/20711240/how-to-completely-remove-node-js-from-windows

How to remove Node.js from Windows:

1. Take a deep breath.

2. Run npm cache clean --force

3. Uninstall from Programs & Features with the uninstaller.

4. Reboot (or you probably can get away with killing all node-related processes from Task Manager).

5. Look for these folders and remove them (and their contents) if any still exist. Depending on the version you installed, UAC settings, and CPU architecture, these may or may not exist:

   • C:\Program Files (x86)\Nodejs
   • C:\Program Files\Nodejs
   • C:\Users\{User}\AppData\Roaming\npm (or %appdata%\npm)
   • C:\Users\{User}\AppData\Roaming\npm-cache (or %appdata%\npm-cache)
   • C:\Users\{User}\.npmrc (and possibly check for that without the . prefix too)
   • C:\Users\{User}\AppData\Local\Temp\npm-*

6. Check your %PATH% environment variable to ensure no references to Nodejs or npm exist.

7. If it's still not uninstalled, type where node at the command prompt and you'll see where it resides -- delete that (and probably the parent directory) too.

8. Reboot, for good measure.