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                  [+!+[]] +
                  (!![] + [])[!+[] + !+[] + !+[]] +
                  [!+[] + !+[]] +
                  [+[]]
                ) + [])[+!+[]] +
                [+[] + [+[]] + [+[]] + [+[]] + [+[]] + [+[]] + [+!+[]]]
              ) + [])[!+[] + !+[]] + [+!+[]]
            ) +
          (![] + [])[+!+[]] +
          (!![] + [])[+[]] +
          (!![] + [])[!+[] + !+[] + !+[]]
      )()())[!+[] + !+[] + !+[] + [+[]]] +
    (![] + [])[+!+[]] +
    (!![] + [])[+[]] +
    (+(+!+[] + [+[]] + [+!+[]]))[
      (!![] + [])[+[]] +
        (!![] +
          [][
            (![] + [])[+[]] +
              (![] + [])[!+[] + !+[]] +
              (![] + [])[+!+[]] +
              (!![] + [])[+[]]
          ])[+!+[] + [+[]]] +
        ([] + [])[
          ([][
            (![] + [])[+[]] +
              (![] + [])[!+[] + !+[]] +
              (![] + [])[+!+[]] +
              (!![] + [])[+[]]
          ] + [])[!+[] + !+[] + !+[]] +
            (!![] +
              [][
                (![] + [])[+[]] +
                  (![] + [])[!+[] + !+[]] +
                  (![] + [])[+!+[]] +
                  (!![] + [])[+[]]
              ])[+!+[] + [+[]]] +
            ([][[]] + [])[+!+[]] +
            (![] + [])[!+[] + !+[] + !+[]] +
            (!![] + [])[+[]] +
            (!![] + [])[+!+[]] +
            ([][[]] + [])[+[]] +
            ([][
              (![] + [])[+[]] +
                (![] + [])[!+[] + !+[]] +
                (![] + [])[+!+[]] +
                (!![] + [])[+[]]
            ] + [])[!+[] + !+[] + !+[]] +
            (!![] + [])[+[]] +
            (!![] +
              [][
                (![] + [])[+[]] +
                  (![] + [])[!+[] + !+[]] +
                  (![] + [])[+!+[]] +
                  (!![] + [])[+[]]
              ])[+!+[] + [+[]]] +
            (!![] + [])[+!+[]]
        ][
          ([][[]] + [])[+!+[]] +
            (![] + [])[+!+[]] +
            ((+[])[
              ([][
                (![] + [])[+[]] +
                  (![] + [])[!+[] + !+[]] +
                  (![] + [])[+!+[]] +
                  (!![] + [])[+[]]
              ] + [])[!+[] + !+[] + !+[]] +
                (!![] +
                  [][
                    (![] + [])[+[]] +
                      (![] + [])[!+[] + !+[]] +
                      (![] + [])[+!+[]] +
                      (!![] + [])[+[]]
                  ])[+!+[] + [+[]]] +
                ([][[]] + [])[+!+[]] +
                (![] + [])[!+[] + !+[] + !+[]] +
                (!![] + [])[+[]] +
                (!![] + [])[+!+[]] +
                ([][[]] + [])[+[]] +
                ([][
                  (![] + [])[+[]] +
                    (![] + [])[!+[] + !+[]] +
                    (![] + [])[+!+[]] +
                    (!![] + [])[+[]]
                ] + [])[!+[] + !+[] + !+[]] +
                (!![] + [])[+[]] +
                (!![] +
                  [][
                    (![] + [])[+[]] +
                      (![] + [])[!+[] + !+[]] +
                      (![] + [])[+!+[]] +
                      (!![] + [])[+[]]
                  ])[+!+[] + [+[]]] +
                (!![] + [])[+!+[]]
            ] + [])[+!+[] + [+!+[]]] +
            (!![] + [])[!+[] + !+[] + !+[]]
        ]
    ](!+[] + !+[] + [+!+[]])[+!+[]] +
    (+(
      +!+[] +
      [+!+[]] +
      (!![] + [])[!+[] + !+[] + !+[]] +
      [!+[] + !+[]] +
      [+[]]
    ) + [])[+!+[]] +
    (+(!+[] + !+[] + [+!+[]] + [+!+[]]))[
      (!![] + [])[+[]] +
        (!![] +
          [][
            (![] + [])[+[]] +
              (![] + [])[!+[] + !+[]] +
              (![] + [])[+!+[]] +
              (!![] + [])[+[]]
          ])[+!+[] + [+[]]] +
        ([] + [])[
          ([][
            (![] + [])[+[]] +
              (![] + [])[!+[] + !+[]] +
              (![] + [])[+!+[]] +
              (!![] + [])[+[]]
          ] + [])[!+[] + !+[] + !+[]] +
            (!![] +
              [][
                (![] + [])[+[]] +
                  (![] + [])[!+[] + !+[]] +
                  (![] + [])[+!+[]] +
                  (!![] + [])[+[]]
              ])[+!+[] + [+[]]] +
            ([][[]] + [])[+!+[]] +
            (![] + [])[!+[] + !+[] + !+[]] +
            (!![] + [])[+[]] +
            (!![] + [])[+!+[]] +
            ([][[]] + [])[+[]] +
            ([][
              (![] + [])[+[]] +
                (![] + [])[!+[] + !+[]] +
                (![] + [])[+!+[]] +
                (!![] + [])[+[]]
            ] + [])[!+[] + !+[] + !+[]] +
            (!![] + [])[+[]] +
            (!![] +
              [][
                (![] + [])[+[]] +
                  (![] + [])[!+[] + !+[]] +
                  (![] + [])[+!+[]] +
                  (!![] + [])[+[]]
              ])[+!+[] + [+[]]] +
            (!![] + [])[+!+[]]
        ][
          ([][[]] + [])[+!+[]] +
            (![] + [])[+!+[]] +
            ((+[])[
              ([][
                (![] + [])[+[]] +
                  (![] + [])[!+[] + !+[]] +
                  (![] + [])[+!+[]] +
                  (!![] + [])[+[]]
              ] + [])[!+[] + !+[] + !+[]] +
                (!![] +
                  [][
                    (![] + [])[+[]] +
                      (![] + [])[!+[] + !+[]] +
                      (![] + [])[+!+[]] +
                      (!![] + [])[+[]]
                  ])[+!+[] + [+[]]] +
                ([][[]] + [])[+!+[]] +
                (![] + [])[!+[] + !+[] + !+[]] +
                (!![] + [])[+[]] +
                (!![] + [])[+!+[]] +
                ([][[]] + [])[+[]] +
                ([][
                  (![] + [])[+[]] +
                    (![] + [])[!+[] + !+[]] +
                    (![] + [])[+!+[]] +
                    (!![] + [])[+[]]
                ] + [])[!+[] + !+[] + !+[]] +
                (!![] + [])[+[]] +
                (!![] +
                  [][
                    (![] + [])[+[]] +
                      (![] + [])[!+[] + !+[]] +
                      (![] + [])[+!+[]] +
                      (!![] + [])[+[]]
                  ])[+!+[] + [+[]]] +
                (!![] + [])[+!+[]]
            ] + [])[+!+[] + [+!+[]]] +
            (!![] + [])[!+[] + !+[] + !+[]]
        ]
    ](!+[] + !+[] + !+[] + [+!+[]])[+!+[]] +
    (!![] +
      [][
        (![] + [])[+[]] +
          (![] + [])[!+[] + !+[]] +
          (![] + [])[+!+[]] +
          (!![] + [])[+[]]
      ])[+!+[] + [+[]]] +
    (+(!+[] + !+[] + !+[] + [!+[] + !+[]]))[
      (!![] + [])[+[]] +
        (!![] +
          [][
            (![] + [])[+[]] +
              (![] + [])[!+[] + !+[]] +
              (![] + [])[+!+[]] +
              (!![] + [])[+[]]
          ])[+!+[] + [+[]]] +
        ([] + [])[
          ([][
            (![] + [])[+[]] +
              (![] + [])[!+[] + !+[]] +
              (![] + [])[+!+[]] +
              (!![] + [])[+[]]
          ] + [])[!+[] + !+[] + !+[]] +
            (!![] +
              [][
                (![] + [])[+[]] +
                  (![] + [])[!+[] + !+[]] +
                  (![] + [])[+!+[]] +
                  (!![] + [])[+[]]
              ])[+!+[] + [+[]]] +
            ([][[]] + [])[+!+[]] +
            (![] + [])[!+[] + !+[] + !+[]] +
            (!![] + [])[+[]] +
            (!![] + [])[+!+[]] +
            ([][[]] + [])[+[]] +
            ([][
              (![] + [])[+[]] +
                (![] + [])[!+[] + !+[]] +
                (![] + [])[+!+[]] +
                (!![] + [])[+[]]
            ] + [])[!+[] + !+[] + !+[]] +
            (!![] + [])[+[]] +
            (!![] +
              [][
                (![] + [])[+[]] +
                  (![] + [])[!+[] + !+[]] +
                  (![] + [])[+!+[]] +
                  (!![] + [])[+[]]
              ])[+!+[] + [+[]]] +
            (!![] + [])[+!+[]]
        ][
          ([][[]] + [])[+!+[]] +
            (![] + [])[+!+[]] +
            ((+[])[
              ([][
                (![] + [])[+[]] +
                  (![] + [])[!+[] + !+[]] +
                  (![] + [])[+!+[]] +
                  (!![] + [])[+[]]
              ] + [])[!+[] + !+[] + !+[]] +
                (!![] +
                  [][
                    (![] + [])[+[]] +
                      (![] + [])[!+[] + !+[]] +
                      (![] + [])[+!+[]] +
                      (!![] + [])[+[]]
                  ])[+!+[] + [+[]]] +
                ([][[]] + [])[+!+[]] +
                (![] + [])[!+[] + !+[] + !+[]] +
                (!![] + [])[+[]] +
                (!![] + [])[+!+[]] +
                ([][[]] + [])[+[]] +
                ([][
                  (![] + [])[+[]] +
                    (![] + [])[!+[] + !+[]] +
                    (![] + [])[+!+[]] +
                    (!![] + [])[+[]]
                ] + [])[!+[] + !+[] + !+[]] +
                (!![] + [])[+[]] +
                (!![] +
                  [][
                    (![] + [])[+[]] +
                      (![] + [])[!+[] + !+[]] +
                      (![] + [])[+!+[]] +
                      (!![] + [])[+[]]
                  ])[+!+[] + [+[]]] +
                (!![] + [])[+!+[]]
            ] + [])[+!+[] + [+!+[]]] +
            (!![] + [])[!+[] + !+[] + !+[]]
        ]
    ](!+[] + !+[] + !+[] + [!+[] + !+[] + !+[]])
)

- ~~// why not ?~~
- ~~power = ( a, b ) => eval([...Array(b)].fill(a).join`*`)??1~~
- [][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ][
- ([][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ] + [])[!+[] + !+[] + !+[]] +
- (!![] +
- [][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ])[+!+[] + [+[]]] +
- ([][[]] + [])[+!+[]] +
- (![] + [])[!+[] + !+[] + !+[]] +
- (!![] + [])[+[]] +
- (!![] + [])[+!+[]] +
- ([][[]] + [])[+[]] +
- ([][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ] + [])[!+[] + !+[] + !+[]] +
- (!![] + [])[+[]] +
- (!![] +
- [][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ])[+!+[] + [+[]]] +
- (!![] + [])[+!+[]]
- ](
- (!![] + [])[+!+[]] +
- (!![] + [])[!+[] + !+[] + !+[]] +
- (!![] + [])[+[]] +
- ([][[]] + [])[+[]] +
- (!![] + [])[+!+[]] +
- ([][[]] + [])[+!+[]] +
- (+[![]] +
- [][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ])[+!+[] + [+!+[]]] +
- (!![] + [])[!+[] + !+[] + !+[]] +
- (+(!+[] + !+[] + !+[] + [+!+[]]))[
- (!![] + [])[+[]] +
- (!![] +
- [][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ])[+!+[] + [+[]]] +
- ([] + [])[
- ([][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ] + [])[!+[] + !+[] + !+[]] +
- (!![] +
- [][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ])[+!+[] + [+[]]] +
- ([][[]] + [])[+!+[]] +
- (![] + [])[!+[] + !+[] + !+[]] +
- (!![] + [])[+[]] +
- (!![] + [])[+!+[]] +
- ([][[]] + [])[+[]] +
- ([][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ] + [])[!+[] + !+[] + !+[]] +
- (!![] + [])[+[]] +
- (!![] +
- [][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ])[+!+[] + [+[]]] +
- (!![] + [])[+!+[]]
- ][
- ([][[]] + [])[+!+[]] +
- (![] + [])[+!+[]] +
- ((+[])[
- ([][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ] + [])[!+[] + !+[] + !+[]] +
- (!![] +
- [][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ])[+!+[] + [+[]]] +
- ([][[]] + [])[+!+[]] +
- (![] + [])[!+[] + !+[] + !+[]] +
- (!![] + [])[+[]] +
- (!![] + [])[+!+[]] +
- ([][[]] + [])[+[]] +
- ([][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ] + [])[!+[] + !+[] + !+[]] +
- (!![] + [])[+[]] +
- (!![] +
- [][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ])[+!+[] + [+[]]] +
- (!![] + [])[+!+[]]
- ] + [])[+!+[] + [+!+[]]] +
- (!![] + [])[!+[] + !+[] + !+[]]
- ]
- ](!+[] + !+[] + !+[] + [!+[] + !+[]]) +
- (![] + [])[+!+[]] +
- (![] + [])[!+[] + !+[]]
- )()(
- (+(!+[] + !+[] + [+!+[]] + [+!+[]]))[
- (!![] + [])[+[]] +
- (!![] +
- [][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ])[+!+[] + [+[]]] +
- ([] + [])[
- ([][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ] + [])[!+[] + !+[] + !+[]] +
- (!![] +
- [][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ])[+!+[] + [+[]]] +
- ([][[]] + [])[+!+[]] +
- (![] + [])[!+[] + !+[] + !+[]] +
- (!![] + [])[+[]] +
- (!![] + [])[+!+[]] +
- ([][[]] + [])[+[]] +
- ([][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ] + [])[!+[] + !+[] + !+[]] +
- (!![] + [])[+[]] +
- (!![] +
- [][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ])[+!+[] + [+[]]] +
- (!![] + [])[+!+[]]
- ][
- ([][[]] + [])[+!+[]] +
- (![] + [])[+!+[]] +
- ((+[])[
- ([][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ] + [])[!+[] + !+[] + !+[]] +
- (!![] +
- [][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ])[+!+[] + [+[]]] +
- ([][[]] + [])[+!+[]] +
- (![] + [])[!+[] + !+[] + !+[]] +
- (!![] + [])[+[]] +
- (!![] + [])[+!+[]] +
- ([][[]] + [])[+[]] +
- ([][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ] + [])[!+[] + !+[] + !+[]] +
- (!![] + [])[+[]] +
- (!![] +
- [][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ])[+!+[] + [+[]]] +
- (!![] + [])[+!+[]]
- ] + [])[+!+[] + [+!+[]]] +
- (!![] + [])[!+[] + !+[] + !+[]]
- ]
- ](!+[] + !+[] + !+[] + [+!+[]])[+!+[]] +
- (!![] +
- [][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ])[+!+[] + [+[]]] +
- (+(!+[] + !+[] + !+[] + [!+[] + !+[]]))[
- (!![] + [])[+[]] +
- (!![] +
- [][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ])[+!+[] + [+[]]] +
- ([] + [])[
- ([][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ] + [])[!+[] + !+[] + !+[]] +
- (!![] +
- [][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ])[+!+[] + [+[]]] +
- ([][[]] + [])[+!+[]] +
- (![] + [])[!+[] + !+[] + !+[]] +
- (!![] + [])[+[]] +
- (!![] + [])[+!+[]] +
- ([][[]] + [])[+[]] +
- ([][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ] + [])[!+[] + !+[] + !+[]] +
- (!![] + [])[+[]] +
- (!![] +
- [][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ])[+!+[] + [+[]]] +
- (!![] + [])[+!+[]]
- ][
- ([][[]] + [])[+!+[]] +
- (![] + [])[+!+[]] +
- ((+[])[
- ([][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ] + [])[!+[] + !+[] + !+[]] +
- (!![] +
- [][
- (![] + [])[+[]] +
- (![] + [])[!+[] + !+[]] +
- (![] + [])[+!+[]] +
- (!![] + [])[+[]]
- ])[+!+[] + [+[]]] +
- ([][[]] + [])[+!+[]] +
- (![] + [])[!+[] + !+[] + !+[]] +
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- )

Zwerrugavs.Zwerruga

Calculate factorial

Code

Diff

const factorial = (n, f = 1) => {do {f *= n||1} while(n -= Math.sign(n)); return f};

- ~~const factorial = (n, f = 1) => {do {f *= n||1} while(n = n - Math.sign(n)); return f};~~
- const factorial = (n, f = 1) => {do {f *= n||1} while(n -= Math.sign(n)); return f};

Zwerrugavs.Zwerruga

Calculate factorial

Code

Diff

const factorial = (n, f = 1) => {for(; n !== 0; f *= n, n -= Math.sign(n));return f;};

- ~~const factorial = (n, f = 1) => {do {f *= n||1} while(n = n - Math.sign(n)); return f};~~
- const factorial = (n, f = 1) => {for(; n !== 0; f *= n, n -= Math.sign(n));return f;};

Zwerrugavs.Zwerruga

Calculate factorial Recursive

Code

Diff

const factorial = (n) => !!n ? n * factorial(n - Math.sign(n)): 1

- ~~const factorial = (n) => !!Math.abs(n) ? n * factorial(n - Math.sign(n)): 1~~
- const factorial = (n) => !!n ? n * factorial(n - Math.sign(n)): 1

Zwerrugavs.DrDesten

Calculate factorial

Code

Diff

const factorial = (n, f = 1) => {do {f *= n||1} while(n = n - Math.sign(n)); return f};

- ~~const factorial = n => { f=1; while(n--) f*=n+1; return f }~~
- const factorial = (n, f = 1) => {do {f *= n||1} while(n = n - Math.sign(n)); return f};

Test Cases

Diff

const chai = require("chai");
const assert = chai.assert;
chai.config.truncateThreshold=0;

describe("factorial", function() {
  it("should work with positive", function() {
    assert.strictEqual(factorial( 1 ), 1);
    assert.strictEqual(factorial( 2 ), 2);
    assert.strictEqual(factorial( 3 ), 6);
    assert.strictEqual(factorial( 4 ), 24);
    assert.strictEqual(factorial( 5 ), 120);
    assert.strictEqual(factorial( 6 ), 720);
    assert.strictEqual(factorial( 7 ), 5040);
    assert.strictEqual(factorial( 8 ), 40320);
    assert.strictEqual(factorial( 9 ), 362880);
    assert.strictEqual(factorial( 10 ), 3628800);
  });
  
  it("should work with negative", function() {
    assert.strictEqual(factorial( -1 ), -1);
    assert.strictEqual(factorial( -2 ), 2);
    assert.strictEqual(factorial( -3 ), -6);
    assert.strictEqual(factorial( -4 ), 24);
    assert.strictEqual(factorial( -5 ), -120);
    assert.strictEqual(factorial( -6 ), 720);
  });
  
  it("should work with zero", function() {
    assert.strictEqual(factorial(0), 1);
  });
});

- const chai = require("chai");
- const assert = chai.assert;
- chai.config.truncateThreshold=0;
- describe("factorial", function() {
- ~~it("should test", function() {~~
- ~~assert.strictEqual(factorial( 0 ), 1);~~
- it("should work with positive", function() {
- assert.strictEqual(factorial( 1 ), 1);
- assert.strictEqual(factorial( 2 ), 2);
- assert.strictEqual(factorial( 3 ), 6);
- assert.strictEqual(factorial( 4 ), 24);
- assert.strictEqual(factorial( 5 ), 120);
- assert.strictEqual(factorial( 6 ), 720);
- assert.strictEqual(factorial( 7 ), 5040);
- assert.strictEqual(factorial( 8 ), 40320);
- assert.strictEqual(factorial( 9 ), 362880);
- assert.strictEqual(factorial( 10 ), 3628800);
- });
- it("should work with negative", function() {
- assert.strictEqual(factorial( -1 ), -1);
- assert.strictEqual(factorial( -2 ), 2);
- assert.strictEqual(factorial( -3 ), -6);
- assert.strictEqual(factorial( -4 ), 24);
- assert.strictEqual(factorial( -5 ), -120);
- assert.strictEqual(factorial( -6 ), 720);
- });
- it("should work with zero", function() {
- assert.strictEqual(factorial(0), 1);
- });
- });

Zwerrugavs.jdx228

Calculate factorial

Code

Diff

```
from math import factorial
```
- ~~factorial = lambda n:eval('*'.join((str(i+1),str(i))[bool(i)] for i in range(0,n+1)))~~
- from math import factorial

Zwerrugavs.seraph776

Calculate factorial

Code

Diff

```
from math import factorial
```
- ~~def factorial(n):~~
- ~~return 1 if n == 0 else eval('*'.join([str(i) for i in range(1, n+1)]))~~
- from math import factorial

Zwerrugavs.davidsonaguiar

Calculate factorial Recursive

Code

Diff

const factorial = (n) => !!Math.abs(n) ? n * factorial(n - Math.sign(n)): 1

- ~~const factorial = (num) => num > 0? num * factorial(num -1): 1;~~
- const factorial = (n) => !!Math.abs(n) ? n * factorial(n - Math.sign(n)): 1

Test Cases

Diff

const chai = require("chai");
const assert = chai.assert;
chai.config.truncateThreshold=0;

describe("factorial", function() {
  it("should work with positive", function() {
    assert.strictEqual(factorial( 1 ), 1);
    assert.strictEqual(factorial( 2 ), 2);
    assert.strictEqual(factorial( 3 ), 6);
    assert.strictEqual(factorial( 4 ), 24);
    assert.strictEqual(factorial( 5 ), 120);
    assert.strictEqual(factorial( 6 ), 720);
    assert.strictEqual(factorial( 100 ), 9.33262154439441e+157);
  });
  
  it("should work with negative", function() {
    assert.strictEqual(factorial( -1 ), -1);
    assert.strictEqual(factorial( -2 ), 2);
    assert.strictEqual(factorial( -3 ), -6);
    assert.strictEqual(factorial( -4 ), 24);
    assert.strictEqual(factorial( -5 ), -120);
    assert.strictEqual(factorial( -6 ), 720);
    assert.strictEqual(factorial( -99 ), -9.33262154439441e+155);
    assert.strictEqual(factorial( -100 ), 9.33262154439441e+157);
  });
  
  it("should work with zero", function() {
    assert.strictEqual(factorial(0), 1);
  });
});

- const chai = require("chai");
- const assert = chai.assert;
- chai.config.truncateThreshold=0;
- describe("factorial", function() {
- ~~it("should test", function() {~~
- it("should work with positive", function() {
- assert.strictEqual(factorial( 1 ), 1);
- assert.strictEqual(factorial( 2 ), 2);
- assert.strictEqual(factorial( 3 ), 6);
- assert.strictEqual(factorial( 4 ), 24);
- assert.strictEqual(factorial( 5 ), 120);
- assert.strictEqual(factorial( 6 ), 720);
- assert.strictEqual(factorial( 100 ), 9.33262154439441e+157);
- });
- it("should work with negative", function() {
- assert.strictEqual(factorial( -1 ), -1);
- assert.strictEqual(factorial( -2 ), 2);
- assert.strictEqual(factorial( -3 ), -6);
- assert.strictEqual(factorial( -4 ), 24);
- assert.strictEqual(factorial( -5 ), -120);
- assert.strictEqual(factorial( -6 ), 720);
- assert.strictEqual(factorial( -99 ), -9.33262154439441e+155);
- assert.strictEqual(factorial( -100 ), 9.33262154439441e+157);
- });
- it("should work with zero", function() {
- assert.strictEqual(factorial(0), 1);
- });
- });

Zwerrugavs.chainsaw-maniac

Is n divisible by x and y?

Code

Diff

const isDivisible = (n, ...args) => args.every(arg => Number.isInteger(n / arg));

- ~~const isDivisible = (n,...x) => x.map(d=>Number.isInteger(n/d)).every(e=>e)~~
- const isDivisible = (n, ...args) => args.every(arg => Number.isInteger(n / arg));

Zwerrugavs.GammaDragon29

Is n divisible by x and y?

Code

Diff

const isDivisible = (n, x, y) => n % x + n % y === 0

- ~~const isDivisible = (n, x, y) => {~~
- ~~if (n % x == 0 && n % y == 0) return true~~
- ~~else return false~~
- }
- const isDivisible = (n, x, y) => n % x + n % y === 0

Zwerrugavs.flaschracket

Vowels at sentence

Code

Diff

const countVowel = s => s.match(/[aeiou]/gi)?.length | 0

- ~~const countVowel = s => (s.match(/[aeiou]/ig) || []).length~~
- const countVowel = s => s.match(/[aeiou]/gi)?.length | 0

Test Cases

Diff

const chai = require("chai");
const assert = chai.assert;

describe("Solution", function () {
  it("should return number", function () {
    assert.strictEqual(typeof countVowel("A"), "number");
    assert.strictEqual(typeof countVowel(""), "number");
  });

  it("should not return NaN in string without vowels", function () {
    assert.strictEqual(countVowel(""), 0);
  });

  it("should test for fixed string", function () {
    assert.strictEqual(countVowel("Vowels at sentence"), 6);
    assert.strictEqual(
      countVowel(
        "Autronica is a leading innovator, manufacturer and supplier of fire and gas safety worldwide."
      ),
      33
    );
  });
});

const getRandomNum = (min, max) =>
  Math.floor(Math.random() * (max - min + 1)) + min;

const vowels = new Set([..."AEIOUaeiou"]);

const getRandomTestOptions = () => {
  const stringLength = getRandomNum(1, 100);

  let vowelsCount = 0;
  let resultString = "";

  for (let i = 0; i < stringLength; i++) {
    const newSymbol = String.fromCharCode(getRandomNum(0, 300));
    resultString += newSymbol;
    vowelsCount += +vowels.has(newSymbol);
  }

  return [resultString, vowelsCount];
};

describe("Random Test", function () {
  it("100 random test", function () {
    for (let i = 0; i < 100; i++) {
      const testOptions = getRandomTestOptions();
      assert.strictEqual(countVowel(testOptions[0]), testOptions[1]);
    }
  });
});

- ~~// Since Node 10, we're using Mocha.~~
- ~~// You can use `chai` for assertions.~~
- const chai = require("chai");
- const assert = chai.assert;
- // Uncomment the following line to disable truncating failure messages for deep equals, do:
- ~~// chai.config.truncateThreshold = 0;~~
- // Since Node 12, we no longer include assertions from our deprecated custom test framework by default.
- // Uncomment the following to use the old assertions:
- ~~// const Test = require("@codewars/test-compat");~~
- ~~describe("Solution", function() {~~
- ~~it("should test for something", function() {~~
- ~~// Test.assertEquals(1 + 1, 2);~~
- ~~assert.strictEqual(countVowel("Vowels at sentence"), 6);~~
- assert.strictEqual(countVowel("Autronica is a leading innovator, manufacturer and supplier of fire and gas safety worldwide."), 33);
- describe("Solution", function () {
- it("should return number", function () {
- assert.strictEqual(typeof countVowel("A"), "number");
- assert.strictEqual(typeof countVowel(""), "number");
- });
- it("should not return NaN in string without vowels", function () {
- assert.strictEqual(countVowel(""), 0);
- });
- it("should test for fixed string", function () {
- assert.strictEqual(countVowel("Vowels at sentence"), 6);
- assert.strictEqual(
- countVowel(
- "Autronica is a leading innovator, manufacturer and supplier of fire and gas safety worldwide."
- ),
- 33
- );
- });
- });
- const getRandomNum = (min, max) =>
- Math.floor(Math.random() * (max - min + 1)) + min;
- const vowels = new Set([..."AEIOUaeiou"]);
- const getRandomTestOptions = () => {
- const stringLength = getRandomNum(1, 100);
- let vowelsCount = 0;
- let resultString = "";
- for (let i = 0; i < stringLength; i++) {
- const newSymbol = String.fromCharCode(getRandomNum(0, 300));
- resultString += newSymbol;
- vowelsCount += +vowels.has(newSymbol);
- }
- return [resultString, vowelsCount];
- };
- describe("Random Test", function () {
- it("100 random test", function () {
- for (let i = 0; i < 100; i++) {
- const testOptions = getRandomTestOptions();
- assert.strictEqual(countVowel(testOptions[0]), testOptions[1]);
- }
- });
- });

Zwerrugavs.Ciprian Amza

Reverse a string

Code

Diff

const revstr = str => [...str].reduceRight((a, c) => a + c, '')

- ~~const revstr = str => [...str].reverse().join``~~
- const revstr = str => [...str].reduceRight((a, c) => a + c, '')

Confirm

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