/**
* Checks whether the two vectors are of the same vector space.
*
* @api
* @param self $b The vector to check against.
* @return bool True if the vectors are the same vector space, false otherwise.
*/
public function isSameVectorSpace(self $b)
{
return array_keys($this->components()) === array_keys($b->components());
}
<?php require "./vendor/nubs/vectorix/src/Vector.php"; use Nubs\Vectorix\Vector; $v = new Vector([2, 5]); $ary = $v->components(); print $ary[0] . " " . $ary[1] . "\n"; $w = $v->multiplyByScalar(3); $ary = $w->components(); print $ary[0] . " " . $ary[1] . "\n";
/**
* Verify that components() returns the same components the vector was
* constructed with.
*
* In particular, this makes sure that the keys are left alone.
*
* @test
* @covers ::__construct
* @covers ::components
*/
public function componentsMaintainStructure()
{
$components = [5, 2.4, 'z' => 1.773];
$vector = new Vector($components);
$this->assertSame($components, $vector->components());
}
