public function testBind()
{
$m = 'abc';
$f = function ($a) {
return $a . ',';
};
$m1 = bind($m, $f);
$this->assertEquals('a,b,c,', $m1);
}
public function testBind()
{
$m = Just(3);
$f = function ($a) {
return Just($a + 2);
};
$m1 = bind($m, $f);
$this->assertEquals(new Func\Maybe\Just(5), $m1);
$m2 = $m->bind($f);
$this->assertEquals(Just(5), $m2);
$m3 = $m->bind(function ($_) {
return Nothing();
});
$this->assertEquals(Nothing(), $m3);
}
public function testForeach()
{
$m = [1, 2, 3];
$i = 1;
$mm = [$m];
$x2 = function ($a) {
return [$a * 2];
};
$mm2 = [bind($m, $x2)];
$mm = mplus($mm, $mm2);
$i = 1;
$j = 1;
foreach ($mm as $vv) {
$i = $j;
foreach ($vv as $v) {
$this->assertEquals($i, $v);
$i += $j;
}
$j++;
}
$this->assertEquals(8, $i);
$this->assertEquals(3, $j);
}