powershell autocomplete

C++
# Shows navigable menu of all options when hitting Tab
Set-PSReadlineKeyHandler -Key Tab -Function MenuComplete

# Autocompletion for arrow keys
Set-PSReadlineKeyHandler -Key UpArrow -Function HistorySearchBackward
Set-PSReadlineKeyHandler -Key DownArrow -Function HistorySearchForward
# Create profile when not exist
if (!(Test-Path -Path $PROFILE.CurrentUserAllHosts)) {
  New-Item -ItemType File -Path $PROFILE.CurrentUserAllHosts -Force
}

# Open the profile with an editor (e.g. good old Notepad)
ii $PROFILE.CurrentUserAllHosts
Source

Also in C++: