function permuteT1() {
let permutations = []
for (let i = 0; i < 3; i++) {
permutations.push([i])
}
return permutations;
}
permuteT1()
function permuteT2() {
let permutations = [];
for (let i = 0; i < 3; i++) {
for (let j = 0; j < 3; j++) {
if (i == j) continue;
permutations.push([i, j]);
}
}
return permutations;
}
permuteT2()
function permuteT3() {
const permutations = [];
for (let i = 0; i < 3; i++) {
for (let j = 0; j < 3; j++) {
if (j == i) continue;
for (let k = 0; k < 3; k++) {
if (k == i || k == j) continue;
permutations.push([i, j, k]);
}
}
}
return permutations;
}
permuteT3()
function permute(n, x) {
const permutations = [];
function pick(current) {
if (current.length == x) {
permutations.push(current);
return;
}
for (let i = 0; i < n; i++) {
if (current.includes(i)) continue;
pick([...current, i]);
}
}
pick([]);
return permutations;
}
permute(1,1)
permute(2,2)
permute(3,2)
permute(3,3)
function permuteS(n, x) {
const permutations = [];
let current = new Array(n);
const selection = j => current.slice(0, j);
function pick(j) {
if (j === x) {
permutations.push(selection(x));
return;
}
for (let i = 0; i < n; i++) {
if (selection(j).includes(i)) continue;
current[j] = i;
pick(j+1);
}
}
pick(0);
return permutations;
}
permuteS(3,2)
permuteS(3,3)
function permuteR(n, x) {
const logs = []
let current = new Array(n).fill(-1);
const selection = j => current.slice(0, j);
function pick(j) {
if (j === x) {
logs.push(selection(x));
return;
}
while (current[j] < n - 1) {
current[j]++;
if (selection(j).includes(current[j])) continue;
pick(j+1);
}
current[j] = -1;
}
pick(0)
return logs
}
permuteR(3,2)
permuteR(3,3)
function permuteB(n, x) {
const logs = []
function pick(current) {
if (current.length == x) {
logs.push(current);
return;
}
for (let i = 0; i < n; i++) {
// if (current.includes(i)) continue;
pick([...current, i]);
}
}
pick([]);
return logs
}
permuteB(3,2)
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