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赴日工程师 两个数组合并为一个数组

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发表于 2012-5-23 13:04:28 | 显示全部楼层 |阅读模式
有两个数组
我想把这两个数组合并为一个数组
第一个数组的值作为key,
第二个数组的值作为value
在php中可以使用array_combine 函数(具体参考二楼)
不知道在.net里面有没有类似的方法

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 楼主| 发表于 2012-5-23 13:07:17 | 显示全部楼层
Question:
Elegant way to merge two arrays as key value pairs in PHP?

I've got two arrays of the same size. I'd like to merge the two so the values of one are the key indexes of the new array, and the values of the new array are the values of the other.

Right now I'm just looping through the arrays and creating the new array manually, but I have a feeling there is a much more elegant way to go about this. I don't see any array functions for this purpose, but maybe I missed something? Is there a simple way to this along these lines?

$mapped_array = mapkeys($array_with_keys, $array_with_values);

Answer:
(from the docs for easy reading)
array_combine — Creates an array by using one array for keys and another for its values
Description
array array_combine ( array $keys , array $values )
Creates an array by using the values from the keys array as keys and the values from the values array as the corresponding values.
Parameters
keys - Array of keys to be used. Illegal values for key will be converted to string.
values - Array of values to be used
Example
<?php
$a = array('green', 'red', 'yellow');
$b = array('avocado', 'apple', 'banana');
$c = array_combine($a, $b);  
print_r($c); ?>

The above example will output:
Array (   
[green]  => avocado     
[red]    => apple   
[yellow] => banana )
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