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两个数组合并解决方案

WBOY
WBOYOriginal
2016-06-13 12:26:20846browse

两个数组合并
不太会描述,我举个例吧

array1
array1[0] = '1';
array1[1] = '2';

array2
array2[0] = '3';
array2[1] = '4';

想组合成

array[0]['arr1'] = '1'
array[0]['arr2'] = '3'

array[1]['arr1'] = '1'
array[1]['arr2'] = '4'

array[2]['arr1'] = '2'
array[2]['arr2'] = '3'

array[3]['arr1'] = '2'
array[3]['arr2'] = '4'
------解决思路----------------------
这是在求 笛卡尔积
------解决思路----------------------
用递归实现的,但是只能是两个数组,感觉这种方法有点笨

<br />$arr1=array(1,2);<br />$arr2=array(3,4);<br /><br />$res = test($arr1,$arr2,0,0);<br /><br />echo "<pre class="brush:php;toolbar:false">";<br />print_r($res);<br />echo "
";

function test($arr1,$arr2,$index1=0,$index2=0) {
static $result = array();
$tmp[]=$arr1[$index1];
$tmp[]=$arr2[$index2];
$result [] = $tmp;

if(($index1==count($arr1)-1) && ($index2==count($arr2)-1)){
return $result;
}else{
if($index2==count($arr2)-1){
$index1++;
$index2 = 0;
}else{
$index2++;
}
return test($arr1,$arr2,$index1,$index2);
}
}
/*
Array
(
    [0] => Array
        (
            [0] => 1
            [1] => 3
        )

    [1] => Array
        (
            [0] => 1
            [1] => 4
        )

    [2] => Array
        (
            [0] => 2
            [1] => 3
        )

    [3] => Array
        (
            [0] => 2
            [1] => 4
        )

)
*/

------解决思路----------------------
<br />$arr1 = array(1,2);<br />$arr2 = array(3,4);<br />$arr = array();<br /><br />for($i=0,$max1=count($arr1); $i<$max1; $i++){<br />    for($j=0,$max2=count($arr2); $j<$max2; $j++){<br />        $tmp = array();<br />        $tmp['arr1'] = $arr1[$i];<br />        $tmp['arr2'] = $arr2[$j];<br />        $arr[] = $tmp;<br />    }<br />}<br /><br />print_r($arr);<br />

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