Question

以前,我想将一系列的价值观引入新的阵列,其逻辑性如下。

旧阵

index|value
0=23
1=34
2=45
3=56
4=56
5=78
6=45
7=67
8=56
9=45

我希望这种系列中的新阵列储备指数值:0,1,4,5,8,9。

Answer 1

如你想要“两条,两条”顺序,就会这样做;

$input = array(23, 34, 45, 56, 56, 78, 45, 67, 56, 45);
$output = array();

$count = count($input);
for($i = 0; $i < $count; $i++)
{
  $output[$i] = $input[$i];
  if($i % 4 == 1)
    $i += 2;
}

var_dump($output);

Answer 2

I am not entirely sure what you are trying to do, but I will answer as best as I can.

仅从原有阵列中获得价值的新阵列,可使用http://php.net/manual/en/Function.array- Values.php” rel=“nofollow”array_ Values(^DOCs。

仅使用以下几套钥匙:array_keys(^DOCs 。

为按其价值排列阵列,您将使用 http://php.net/manual/en/Function.asort.php” rel=“nofollow”^DOCs。

之后,为了达到阵列价值,但根据顺序,你将使用:

$array = array(53,23,43);
sort($array);

See the sort() manual page.

Answer 3

就像一项行动一样,一种在

class stripes extends ArrayIterator {
    private $partial, $step;

    public function __construct($array, $step) {
        parent::__construct($array);
        $this->step = $step;
        $this->partial=0;
    }

    public function next() {
        $this->partial++;
        if ($this->partial >=$this->step) {
            for($step=$this->step;$step;$step--)
                parent::next();
            $this->partial=0;
        }
        parent::next();
    }
}

It has a quite simple usage:

$input = array(23,24,45,56,56,78,45,67,56,45);
$iterator = new stripes($input,2);
$result = iterator_to_array($iterator)

In $result you have the array you need. You can change the size of the stripes just changing the second parameter of the stripes constructor without polluting your live code space.

参考资料:

ArrayIterator
iterator_to_array

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