An Applescript to resize windows from the command line

resize.scpt

on run argv
-- Variables
set _cmd to (item 1 of argv)
tell application "Finder" to set _bounds to bounds of window of desktop
set _xPos to (item 1 of _bounds)
set _yPos to (item 2 of _bounds)
set _ySize to (item 3 of _bounds)
set _xSize to (item 4 of _bounds)
-- get bounds
-- do split: app1, app2, set split

if (_cmd = "split") then
  set _app1 to (item 2 of argv)
  set _app2 to (item 3 of argv)
  set _splitPerc to ((item 4 of argv)/100)
  set _splitPoint to (_ySize*_splitPerc)

tell application "System Events" to tell process _app1
    set position of front window to {_xPos, _yPos}
    set size of front window to {_splitPoint, _xSize}
  end tell

  tell application "System Events" to tell process _app2
    set position of front window to {_splitPoint, _yPos}
    set size of front window to {_ySize-_splitPoint, _xSize}
  end tell

if (_splitPerc >= 0.5) then
  --your code
  tell application _app2 to activate
  tell application _app1 to activate
else
  --your code
  tell application _app1 to activate
  tell application _app2 to activate
end if

end if
	
end run