init.lua

-- assume karbiner-elements maps capslock to hyper
local hyper = {"⌘", "⌥", "⌃", "⇧"}

function open(name)
    return function()
        hs.application.launchOrFocus(name)
    end
end

-- modal to toggle appswitcher
k = hs.hotkey.modal.new(hyper, 'e') 
function k:entered() hs.alert('App switcher mode', {radius=4}, 1)
end 
function k:exited() hs.alert('Native mode', {radius=4}, 1)
end 
k:bind(hyper, 'e', function() k:exit() end) 
k:bind('cmd', '1', nil, open('iTerm'))
k:bind('cmd', '2', nil, open('Firefox'))