Visual Studio Code Editor is a Text Editor based on Atom created by Microsoft.
https://code.visualstudio.com/
It is optimized for Code Editing and has a great Plug In community.
It seems someone already create a PortableApps version of it:
https://github.com/garethflowers/vscode-portable
All needed is to approach him to maintain it as official release of PortableApps.
Thank You.