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如何合并这个二维数组？
- WBOYOriginal
- 2016-06-06 20:15:531064browse
请看下面的二维数组(php语言)
<code>array(
0 =>
array (
0 => 'a1',
1 => 'b1',
2 => 'c1',
),
1 =>
array (
0 => 'a2',
1 => 'b2',
2 => 'c2',
),
2 =>
array (
0 => 'a3',
1 => 'b3',
2 => 'c3',
),
)</code>
合并成
<code>array(
0 =>
array (
0 => 'a1',
1 => 'a2',
2 => 'a3',
),
1 =>
array (
0 => 'b1',
1 => 'b2',
2 => 'b3',
),
2 =>
array (
0 => 'c1',
1 => 'c2',
2 => 'c3',
),
)</code>
请指点，谢谢。
回复内容：
请看下面的二维数组(php语言)
<code>array(
0 =>
array (
0 => 'a1',
1 => 'b1',
2 => 'c1',
),
1 =>
array (
0 => 'a2',
1 => 'b2',
2 => 'c2',
),
2 =>
array (
0 => 'a3',
1 => 'b3',
2 => 'c3',
),
)</code>
合并成
<code>array(
0 =>
array (
0 => 'a1',
1 => 'a2',
2 => 'a3',
),
1 =>
array (
0 => 'b1',
1 => 'b2',
2 => 'b3',
),
2 =>
array (
0 => 'c1',
1 => 'c2',
2 => 'c3',
),
)</code>
请指点，谢谢。
<code>$arr = array_map(function($key) use($arr) {
return array_column($arr, $key);
}, array_keys($arr[0]));</code>
我一下想到的只有遍历合并，然后搜了一下没有现成的方法，静等大神。
对角线转置矩阵。我能想到的是遍上三角或者下三角。进行交换。a ij 和a ji
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