字母数字数组排序(CAVEAT:空格作为千​​位数字分隔符)

Question

怎么做.例如,我们有一个数组:

array(
    0 => 'Regular 1 000',
    1 => 'Regular 500',
    2 => 'Regular 2 000',
    3 => 'Big',
    4 => 'Regular 1 000 000',
    5 => 'Regular 50 000'
)

我需要按顺序放置它们:

array(
    3 => 'Big',
    1 => 'Regular 500',
    0 => 'Regular 1 000',
    2 => 'Regular 2 000',
    5 => 'Regular 50 000',
    4 => 'Regular 1 000 000'
 )

我需要维护索引关联.看来我需要使用uasort.任何人都可以向我建议一个用于callable ( $cmp_function )价值的功能 吗？

Answer 1

这只适用于数组的数字部分,但我仍然试图围绕杂耍数组包围字母排序.如果有人可以添加它,请随意更新.
如果可能,您可能想尝试更改格式,因为这很令人头疼.

$x = array(
    'Regular 1 000',
    'Regular 500',
    'Regular 2 000',
    'Big',
    'Regular 1 000 000',
    'Regular 50 000'
);

得到:

编辑:尤里卡!

$x = array(
    'A 100', // extra for testing
    'Regular 1 000',
    'Regular 500',
    'Regular 2 000',
    'Big',
    'Regular 1 000 000',
    'Regular 50 000'
);

function cus_sort($a, $b) { // you can also just do $x = function ($a, $b) {}
    $tmp_a = array(); $tmp_b = array(); // temp storage
    $tmp_a = explode(" ", $a, 2);
    if (@$tmp_a[1]) { // tmp_a exists (suppress invalid offset error if not)
        $a_numeric = (int)preg_replace("/[^0-9]/", '', $tmp_a[1]);
        // remove all non-numerical (...should add hyphens if needed...)
    } else {
        $a_numeric = false; // text only.
    }
    // else make sure that it evaluates false when we check.
    $tmp_b = explode(" ", $b, 2); // split into maximum 2 parts at first space.
    if (@$tmp_b[1]) { // tmp_b exists (suppress invalid offset error if not)
        $b_numeric = (int)preg_replace("/[^0-9]/", '', $tmp_b[1]);
    } else {
        $b_numeric = false; 
    }
    // onwards to sorting
    if ($tmp_a[0] == $tmp_b[0]) { //alphabetical parts are the same.
    // numerical sort
        if (($a_numeric > $b_numeric) || (!$b_numeric)) {
            return 1;
        } elseif (($a_numeric < $b_numeric) || (!$a_numeric)) {
            return -1;
        } else {
            return 0;
        }
    } else {
        // alpha sort
        $compare = strcasecmp($tmp_a[0], $tmp_b[0]);
        // see note below
        if ($compare > 0) {
            return 1;
        } elseif ($compare < 0) {
            return -1;
        } else {
            return 0;
        }
    }
}

uasort($x, "cus_sort");

注意:strcasecmp(string $a, string $b)是一种不区分大小写的数字方式来检查是否按顺序.

print_r 收益:

Array
(
    [0] => A 100
    [4] => Big
    [2] => Regular 500
    [1] => Regular 1 000
    [3] => Regular 2 000
    [6] => Regular 50 000
    [5] => Regular 1 000 000
)