lib/map/ellermaze.js
function removeFromList(i, L, R) {
    R[L[i]] = R[i];
    L[R[i]] = L[i];
    R[i] = i;
    L[i] = i;
}
function removeFromList(i, L, R) {
    R[L[i]] = R[i];
    L[R[i]] = L[i];
    R[i] = i;
    L[i] = i;
}
function removeFromList ( i , L , R ) { R [ L [ i ] ] = R [ i ] ; L [ R [ i ] ] = L [ i ] ; R [ i ] = i ; L [ i ] = i ; }
Remove "i" from its list
Remove i from its list