sirpilan

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sirpilanvs.zsolt-szilagyi

Divide by 3 without division operation

Code

Diff

function dividedByThree(int $n): bool
{
  return base_convert(abs($n), 10, 3)[-1] == 0 && $n;
}

- ~~function dividedByThree(int $number): bool~~
- function dividedByThree(int $n): bool
- {
- ~~return $number && !($number % 3);~~
- return base_convert(abs($n), 10, 3)[-1] == 0 && $n;
- }

Test Cases

Diff

class MyTestCasesTest extends TestCase
{
    public function testDividedByThree() {
      $this->assertTrue(dividedByThree(3));
      $this->assertTrue(dividedByThree(12));
      $this->assertFalse(dividedByThree(13));
      $this->assertFalse(dividedByThree(0)); // actually we got a remainder of 0 here, so it should be "assertTrue"
      $this->assertTrue(dividedByThree(-12));
    }
    
    public function testRandomNumbers(){
      $random_number_array = range(1, 100);
      shuffle($random_number_array );
      foreach($random_number_array as $value){
        $isDivisible = $value % 3 == 0;
        $this->assertEquals($isDivisible,dividedByThree($value));
        
      }
    }
}

- class MyTestCasesTest extends TestCase
- {
- public function testDividedByThree() {
- $this->assertTrue(dividedByThree(3));
- $this->assertTrue(dividedByThree(12));
- $this->assertFalse(dividedByThree(13));
- ~~$this->assertFalse(dividedByThree(0));~~
- $this->assertFalse(dividedByThree(0)); // actually we got a remainder of 0 here, so it should be "assertTrue"
- $this->assertTrue(dividedByThree(-12));
- }
- public function testRandomNumbers(){
- $random_number_array = range(1, 100);
- shuffle($random_number_array );
- foreach($random_number_array as $value){
- $isDivisible = $value % 3 == 0;
- $this->assertEquals($isDivisible,dividedByThree($value));
- }
- }
- }

sirpilanvs.sirpilan

BinaryGap

Fundamentals

Logic

Code

Diff

function binaryGap($n) {
  return max(array_map('strlen', explode(1, trim(decbin($n), 0))));
}

- function binaryGap($n) {
- ~~return max(array_map('strlen', explode(1, decbin($n))));~~
- return max(array_map('strlen', explode(1, trim(decbin($n), 0))));
- }

Test Cases

Diff

<?php
use PHPUnit\Framework\TestCase;

// PHPUnit Test Examples:
// TODO: Replace examples and use TDD by writing your own tests
class ExampleTest extends TestCase
{
    // test function names should start with "test"
    public function testThatSomethingShouldHappen() {
      $this->assertEquals(5, binaryGap(bindec('10000010001')));
      $this->assertEquals(2, binaryGap(bindec('1001')));
      $this->assertEquals(0, binaryGap(bindec('1111')));
      $this->assertEquals(2, binaryGap(bindec('101001')));
      $this->assertEquals(2, binaryGap(bindec('100101')));
      $this->assertEquals(2, binaryGap(bindec('100110')));
      $this->assertEquals(1, binaryGap(bindec('101100')));
      $this->assertEquals(0, binaryGap(bindec('1000')));
      $this->assertEquals(0, binaryGap(bindec('001000')));
      $this->assertEquals(0, binaryGap(bindec('000100')));
      $this->assertEquals(0, binaryGap(bindec('001100')));
      $this->assertEquals(2, binaryGap(bindec('010010')));
      $this->assertEquals(0, binaryGap(bindec('0')));
    }
}

- <?php
- use PHPUnit\Framework\TestCase;
- // PHPUnit Test Examples:
- // TODO: Replace examples and use TDD by writing your own tests
- class ExampleTest extends TestCase
- {
- // test function names should start with "test"
- public function testThatSomethingShouldHappen() {
- $this->assertEquals(5, binaryGap(bindec('10000010001')));
- $this->assertEquals(2, binaryGap(bindec('1001')));
- $this->assertEquals(0, binaryGap(bindec('1111')));
- $this->assertEquals(2, binaryGap(bindec('101001')));
- $this->assertEquals(2, binaryGap(bindec('100101')));
- $this->assertEquals(2, binaryGap(bindec('100110')));
- ~~$this->assertEquals(2, binaryGap(bindec('101100')));~~
- $this->assertEquals(1, binaryGap(bindec('101100')));
- $this->assertEquals(0, binaryGap(bindec('1000')));
- $this->assertEquals(0, binaryGap(bindec('001000')));
- $this->assertEquals(0, binaryGap(bindec('000100')));
- $this->assertEquals(0, binaryGap(bindec('001100')));
- $this->assertEquals(2, binaryGap(bindec('010010')));
- $this->assertEquals(0, binaryGap(bindec('0')));
- }
- }

sirpilanvs.sirpilan

BinaryGap

Fundamentals

Logic

Code

Diff

function binaryGap($n) {
  return max(array_map('strlen', explode(1, decbin($n))));
}

- function binaryGap($n) {
- ~~return max([...array_map('strlen', explode(1, decbin($n))), 0]);~~
- return max(array_map('strlen', explode(1, decbin($n))));
- }

Test Cases

Diff

<?php
use PHPUnit\Framework\TestCase;

// PHPUnit Test Examples:
// TODO: Replace examples and use TDD by writing your own tests
class ExampleTest extends TestCase
{
    // test function names should start with "test"
    public function testThatSomethingShouldHappen() {
      $this->assertEquals(5, binaryGap(bindec('10000010001')));
      $this->assertEquals(2, binaryGap(bindec('1001')));
      $this->assertEquals(0, binaryGap(bindec('1111')));
      $this->assertEquals(2, binaryGap(bindec('101001')));
      $this->assertEquals(2, binaryGap(bindec('100101')));
      $this->assertEquals(2, binaryGap(bindec('100110')));
      $this->assertEquals(2, binaryGap(bindec('101100')));
    }
}

- <?php
- use PHPUnit\Framework\TestCase;
- // PHPUnit Test Examples:
- // TODO: Replace examples and use TDD by writing your own tests
- class ExampleTest extends TestCase
- {
- // test function names should start with "test"
- public function testThatSomethingShouldHappen() {
- $this->assertEquals(5, binaryGap(bindec('10000010001')));
- $this->assertEquals(2, binaryGap(bindec('1001')));
- $this->assertEquals(0, binaryGap(bindec('1111')));
- $this->assertEquals(2, binaryGap(bindec('101001')));
- $this->assertEquals(2, binaryGap(bindec('100101')));
- $this->assertEquals(2, binaryGap(bindec('100110')));
- $this->assertEquals(2, binaryGap(bindec('101100')));
- }
- }

sirpilanvs.rowcased

BinaryGap

Fundamentals

Logic

Code

Diff

function binaryGap($n) {
  return max([...array_map('strlen', explode(1, decbin($n))), 0]);
}

- function binaryGap($n) {
- ~~preg_match_all('/[0]+/', trim(decbin($n), 0), $_);~~
- ~~return $_[0] ? max(array_map('strlen', $_[0])) : 0;~~
- return max([...array_map('strlen', explode(1, decbin($n))), 0]);
- }

Test Cases

Diff

<?php
use PHPUnit\Framework\TestCase;

// PHPUnit Test Examples:
// TODO: Replace examples and use TDD by writing your own tests
class ExampleTest extends TestCase
{
    // test function names should start with "test"
    public function testThatSomethingShouldHappen() {
      $this->assertEquals(5, binaryGap(bindec('10000010001')));
      $this->assertEquals(2, binaryGap(bindec('1001')));
      $this->assertEquals(0, binaryGap(bindec('1111')));
      $this->assertEquals(2, binaryGap(bindec('101001')));
      $this->assertEquals(2, binaryGap(bindec('100101')));
    }
}

- <?php
- use PHPUnit\Framework\TestCase;
- // PHPUnit Test Examples:
- // TODO: Replace examples and use TDD by writing your own tests
- class ExampleTest extends TestCase
- {
- // test function names should start with "test"
- public function testThatSomethingShouldHappen() {
- ~~$this->assertEquals(5, binaryGap(1041));~~
- ~~$this->assertEquals(2, binaryGap(9));~~
- ~~$this->assertEquals(0, binaryGap(15));~~
- $this->assertEquals(5, binaryGap(bindec('10000010001')));
- $this->assertEquals(2, binaryGap(bindec('1001')));
- $this->assertEquals(0, binaryGap(bindec('1111')));
- $this->assertEquals(2, binaryGap(bindec('101001')));
- $this->assertEquals(2, binaryGap(bindec('100101')));
- }
- }

sirpilanvs.sirpilan

Function that adds the digits of an integer

Code

Diff

digit_sum = x => (x+'').match(/\d/g).reduce((a, e) => a + +e, 0);

- ~~digit_sum = x => (x+'').split('').reduce((a ,e) => a+ +e||0, 0);~~
- digit_sum = x => (x+'').match(/\d/g).reduce((a, e) => a + +e, 0);

sirpilanvs.ehpc

Function that adds the digits of an integer

Code

Diff

digit_sum = x => (x+'').split('').reduce((a ,e) => a+ +e||0, 0);

- ~~digit_sum = x => String(Math.abs(x)).split('').reduce((a, x) => a + +x, 0);~~
- digit_sum = x => (x+'').split('').reduce((a ,e) => a+ +e||0, 0);

Divide by 3 without division operation

BinaryGap

BinaryGap

BinaryGap

Function that adds the digits of an integer

Function that adds the digits of an integer

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