k.dmitriy.a@gmail.com

def is_even(n):
    return n % 2 ^ 1

- def is_even(n):
- ~~return not(n%2)~~
- return n % 2 ^ 1

k.dmitriy.a@gmail.comvs.mor1nch

Check Even Number

Code

Diff

def is_even(x): return (x << 1 & 2) >> 1 < 1

- ~~def is_even(x): return x & 1 ^ 1~~
- def is_even(x): return (x << 1 & 2) >> 1 < 1

k.dmitriy.a@gmail.comvs.mor1nch

Check Even Number

Code

Diff

```
is_even=lambda x: ~ x & 1
```
- ~~is_even=lambda x: x & 1 ^ 1~~
- is_even=lambda x: ~ x & 1

k.dmitriy.a@gmail.comvs.pawptart

Check Even Number

Code

Diff

```
def is_even(x):
    return x & 1 ^ 1
```
- def is_even(x):
- ~~return not x & 1~~
- return x & 1 ^ 1

k.dmitriy.a@gmail.comvs.Norega

This number is even or odd?

Code

Diff

even_or_odd = lambda n: "Odd" if n & 1 else "Even"

- ~~even_or_odd = lambda n: "Odd" if n % 2 else "Even"~~
- even_or_odd = lambda n: "Odd" if n & 1 else "Even"

k.dmitriy.a@gmail.comvs.Windows98

Check Even Number

Code

Diff

```
def is_even(x):
    return 1 ^ x % 2
```
- def is_even(x):
- ~~return abs((x % 2)-1)~~
- return 1 ^ x % 2

k.dmitriy.a@gmail.comvs.AVeryBadProgrammer

Check Even Number

Code

Diff

```
is_even = lambda x: not x % 2
```
- ~~is_even = lambda x: not bool(x % 2)~~
- is_even = lambda x: not x % 2

k.dmitriy.a@gmail.comvs.monkey_on_a_keyboard_1

double value

Code

Diff

package cat;
public class kata{
public static int doubleValue(int x) {
    return x << 1;
}
}

- package cat;
- public class kata{
- public static int doubleValue(int x) {
- ~~return x * 2;~~
- return x << 1;
- }
- }

k.dmitriy.a@gmail.comvs.user9015794

This number is even or odd?

Code

Diff

def even_or_odd(n):
    return ("Even", "Odd")[n % 2]

- def even_or_odd(n):
- ~~return ["Even", "Odd"][n % 2]~~
- return ("Even", "Odd")[n % 2]

k.dmitriy.a@gmail.comvs.user9015794

Check Even Number

Code

Diff

```
is_even = lambda x: not x & 1
```
- ~~is_even = lambda x: not(x % 2)~~
- is_even = lambda x: not x & 1

Test Cases

Diff

import codewars_test as test
import solution

@test.describe('Test')
def test_group():
    @test.it('Even case')
    def is_even():
        for i in range(-30, 30, 2):
            test.assert_equals(solution.is_even(i), True)
            
    @test.it('Odd case')
    def is_even():
        for i in range(-29, 30, 2):
            test.assert_equals(solution.is_even(i), False)

- import codewars_test as test
- import solution
- @test.describe('Test')
- def test_group():
- @test.it('Even case')
- def is_even():
- ~~for i in range(0, 30, 2):~~
- for i in range(-30, 30, 2):
- test.assert_equals(solution.is_even(i), True)
- @test.it('Odd case')
- def is_even():
- ~~for i in range(1, 30, 2):~~
- for i in range(-29, 30, 2):
- test.assert_equals(solution.is_even(i), False)

k.dmitriy.a@gmail.comvs.ilya_kh

Check Even Number

Code

Diff

```
is_even = lambda x: not x & 1
```
- is_even = lambda x: x % 2 == 0
- is_even = lambda x: not x & 1

Test Cases

Diff

import codewars_test as test
import solution

@test.describe('Test')
def test_group():
    @test.it('Even case')
    def is_even():
        for i in range(-30, 30, 2):
            test.assert_equals(solution.is_even(i), True)
            
    @test.it('Odd case')
    def is_even():
        for i in range(-29, 30, 2):
            test.assert_equals(solution.is_even(i), False)

- import codewars_test as test
- import solution
- @test.describe('Test')
- def test_group():
- @test.it('Even case')
- def is_even():
- ~~for i in range(0, 30, 2):~~
- for i in range(-30, 30, 2):
- test.assert_equals(solution.is_even(i), True)
- @test.it('Odd case')
- def is_even():
- ~~for i in range(1, 30, 2):~~
- for i in range(-29, 30, 2):
- test.assert_equals(solution.is_even(i), False)

k.dmitriy.a@gmail.comvs.kibogdan

Check Even Number

Code

Diff

is_even = lambda x: not x >> 1 << 1 < x

- is_even = lambda x: not (x % 2)
- is_even = lambda x: not x >> 1 << 1 < x

k.dmitriy.a@gmail.comvs.monkey_on_a_keyboard_1

double value

Code

Diff

package cat;
public class kata{
public static int doubleValue(int x) {
    return x + x;
}
}

- package cat;
- public class kata{
- public static int doubleValue(int x) {
- ~~return x * 2;~~
- return x + x;
- }
- }

Test Cases

Diff

import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;
import cat.kata.*;
// TODO: Replace examples and use TDD by writing your own tests

class SolutionTest {
    @Test
    void testSomething() {
        assertEquals(cat.kata.doubleValue(2), 4);
        assertEquals(cat.kata.doubleValue(-2), -4);
    }
}

- import org.junit.jupiter.api.Test;
- import static org.junit.jupiter.api.Assertions.assertEquals;
- import cat.kata.*;
- // TODO: Replace examples and use TDD by writing your own tests
- class SolutionTest {
- @Test
- void testSomething() {
- assertEquals(cat.kata.doubleValue(2), 4);
- assertEquals(cat.kata.doubleValue(-2), -4);
- }
- }

k.dmitriy.a@gmail.comvs.monkey_on_a_keyboard_1

double value: binary except I have trouble with using 2's complement

Code

Diff

import java.lang.Math;
interface Kata {
  static int doubleValue(int x) {
    boolean isNeg=x<0;
    if (isNeg){
      x= -x;
    }
    x=x+x;
    StringBuilder b= new StringBuilder();
    while (x!=0){
      b.append(x%2==0?"h":"a-");
      x=x/2;
    }
    b=b.reverse();
    String s=b.toString().replaceAll("-", "");
    int curr=s.length()-1;
    int acc=0;
    int i=0;
    while (i<s.length()){
      acc+= s.charAt(i)=='a'? (int) Math.pow(2,curr):0;
      i++;
      curr--;
    }
    return isNeg?-acc:acc;
  }
}

- import java.lang.Math;
- interface Kata {
- static int doubleValue(int x) {
- boolean isNeg=x<0;
- if (isNeg){
- x= -x;
- }
- x=x+x;
- StringBuilder b= new StringBuilder();
- while (x!=0){
- ~~b.append(x%2==0?"0":"1");~~
- b.append(x%2==0?"h":"a-");
- x=x/2;
- }
- b=b.reverse();
- ~~String s=b.toString();~~
- String s=b.toString().replaceAll("-", "");
- int curr=s.length()-1;
- int acc=0;
- int i=0;
- while (i<s.length()){
- ~~acc+= s.charAt(i)=='1'? (int) Math.pow(2,curr):0;~~
- acc+= s.charAt(i)=='a'? (int) Math.pow(2,curr):0;
- i++;
- curr--;
- }
- return isNeg?-acc:acc;
- }
- }

k.dmitriy.a@gmail.comvs.offf1234

Check Even Number

Code

Diff

def is_even(x):
    return divmod(x,2)[1] == 0

- def is_even(x):
- ~~return True if divmod(x,2)[1] == 0 else False~~
- return divmod(x,2)[1] == 0

Check Even Number

Check Even Number

Check Even Number

Check Even Number

This number is even or odd?

Check Even Number

Check Even Number

double value

This number is even or odd?

Check Even Number

Check Even Number

Check Even Number

double value

double value: binary except I have trouble with using 2's complement

Check Even Number

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