How to enable tab switching by cmd+number in VS Code

By default, Visual Studio Code does not support cmd+number-style tab switching on macOS. But it can be enabled with a simple configuration change.

1. From within VS Code, enter cmd+shift+p to open the Command Palette. This allows commands to be searched by name.
2. Enter Preferences: Open Keyboard Shortcuts (JSON). [There are other similarly-named commands, so careful reading is advised.]
3. This should open the keybindings.json file. Add the following entries, and save the file:

[
  {
      "key": "cmd+1",
      "command": "workbench.action.openEditorAtIndex1"
  },
  {
      "key": "cmd+2",
      "command": "workbench.action.openEditorAtIndex2"
  },
  {
      "key": "cmd+3",
      "command": "workbench.action.openEditorAtIndex3"
  },
  {
      "key": "cmd+4",
      "command": "workbench.action.openEditorAtIndex4"
  },
  {
      "key": "cmd+5",
      "command": "workbench.action.openEditorAtIndex5"
  },
  {
      "key": "cmd+6",
      "command": "workbench.action.openEditorAtIndex6"
  },
  {
      "key": "cmd+7",
      "command": "workbench.action.openEditorAtIndex7"
  },
  {
      "key": "cmd+8",
      "command": "workbench.action.openEditorAtIndex8"
  },
  {
      "key": "cmd+9",
      "command": "workbench.action.openEditorAtIndex9"
  }
]

After restarting VS Code, cmd + number (cmd+1, cmd+2, etc.) tab switching should work properly.