Created
June 18, 2022 11:07
-
-
Save VictorTaelin/b0980c69c3d57f076c3ada481e4a8564 to your computer and use it in GitHub Desktop.
rollback state list
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
function push(new_state, states) { | |
if (states === null) { | |
return {keep: 0, life: 0, state: new_state, older: null}; | |
} else { | |
var {keep, life, state, older} = states; | |
if (keep === 0) { | |
return {keep: 1, life, state, older}; | |
} else { | |
if (life > 0) { | |
return {keep: 0, life: 0, state: new_state, older: {keep: 0, life: life - 1, state, older}}; | |
} else { | |
return {keep: 0, life, state: new_state, older: push(state, older)}; | |
} | |
} | |
} | |
} | |
function show(states) { | |
if (states === null) { | |
return ""; | |
} else { | |
return (states.keep?"+":"-") + states.state + ", " + show(states.older); | |
} | |
} | |
function rollback(amount, states) { | |
var cut = 0; | |
for (var i = 0; i < 3; ++i) { | |
cut += states.life + 1; | |
states = states.older; | |
} | |
states.keep = 0; | |
states.life = states.life + cut; | |
return states; | |
} | |
var states = null; | |
for (var t = 0; t <= 580; ++t) { | |
states = push(t, states); | |
console.log("[t="+t+"] "+show(states)); | |
} | |
states = rollback(3, states); | |
for (var t = 561; t <= 570; ++t) { | |
states = push(t, states); | |
console.log("[t="+t+"] "+show(states)); | |
} | |
states = rollback(4, states); | |
for (var t = 513; t <= 600; ++t) { | |
states = push(t, states); | |
console.log("[t="+t+"] "+show(states)); | |
} |
Author
VictorTaelin
commented
Jun 18, 2022
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment