在PHP中，如何基于键清理具有半重复值的数组？

假设我们在做某种刮取，最终我们可以得到重复和半重复的结果

给定一个可能看起来有点像这样的输入数组：

$inputArr = [
  [
    'title' => 'Test0',
    'desc'  => 'Short Desc',
  ],
  [
    'title' => 'Test5',
    'desc'  => 'Short Desc',
  ],
  [
    'title' => 'Test0',
    'desc'  => 'Much Longer Than Short Desc',
  ],
  [
    'title' => 'Test0.5',
    'desc'  => 'Short Desc',
  ],
  [
    'title' => 'Test1',
    'desc'  => 'Short Desc',
  ],
  [
    'title' => 'Test1',
    'desc'  => 'Much Longer Than Short Desc',
  ],
  [
    'title' => 'Test1.5',
    'desc'  => 'Much Longer Than Short Desc',
  ],
  [
    'title' => 'Test3',
    'desc'  => 'Short Desc',
  ],
  [
    'title' => 'Test2',
    'desc'  => 'Short Desc',
  ],
  [
    'title' => 'Test3.75',
    'desc'  => 'Much Longer Than Short Desc',
  ],
  [
    'title' => 'Test3.25',
    'desc'  => 'Short Desc',
  ],
  [
    'title' => 'Test2',
    'desc'  => 'Much Longer Than Short Desc',
  ],
  [
    'title' => 'Test3',
    'desc'  => 'Much Longer Than Short Desc',
  ],
  [
    'title' => 'Test5',
    'desc'  => 'Much Longer Than Short Desc',
  ],
  [
    'title' => 'Test3.5',
    'desc'  => 'Short Desc',
  ],
  [
    'title' => 'Test4',
    'desc'  => 'Short Desc',
  ],
  [
    'title' => 'Test5',
    'desc'  => 'Much Longer Than Short Desc',
  ],
  [
    'title' => 'Test4.5',
    'desc'  => 'Short Desc',
  ],
  [
    'title' => 'Test4',
    'desc'  => 'Much Longer Than Short Desc',
  ],
  [
    'title' => 'Test5',
    'desc'  => 'Much Longer Than Short Desc',
  ],
];

foreach($inputArr as $item) {

    if ( isset($result[$item['title']]) && strlen($result[$item['title']]['desc']) > strlen($item['desc']) )
        continue;    

    $result[$item['title']] = $item;
}

$result = array_values($result);

print_r($result);

生成的数组必须只包含一个实例为

title

value的数组，其中

desc

是最长的字符串值，同时删除除

desc

与其他实例具有相同字符串长度值的数组外的所有数组

e、 g.最终输出应如下所示：

$resultArr = [
  [
    'title' => 'Test0',
    'desc'  => 'Much Longer Than Short Desc',
  ],
  [
    'title' => 'Test0.5',
    'desc'  => 'Short Desc',
  ],
  [
    'title' => 'Test1',
    'desc'  => 'Much Longer Than Short Desc',
  ],
  [
    'title' => 'Test1.5',
    'desc'  => 'Much Longer Than Short Desc',
  ],
  [
    'title' => 'Test2',
    'desc'  => 'Much Longer Than Short Desc',
  ],
  [
    'title' => 'Test3',
    'desc'  => 'Much Longer Than Short Desc',
  ],
  [
    'title' => 'Test3.25',
    'desc'  => 'Short Desc',
  ],
  [
    'title' => 'Test3.5',
    'desc'  => 'Short Desc',
  ],
  [
    'title' => 'Test3.75',
    'desc'  => 'Much Longer Than Short Desc',
  ],
  [
    'title' => 'Test4',
    'desc'  => 'Much Longer Than Short Desc',
  ],
  [
    'title' => 'Test4.5',
    'desc'  => 'Short Desc',
  ],
  [
    'title' => 'Test5',
    'desc'  => 'Much Longer Than Short Desc',
  ],
];

我尝试过几种不同的解决方案，但我一个都不喜欢。不管我怎么做，这感觉就像是一个乱七八糟的问题，我觉得我错过了一个明显而优雅的解决方案

---

我知道有人会对比我尝试过的排序、循环和过滤更干净的东西提出很好的建议。

您可以这样做：

$inputArr = [
  [
    'title' => 'Test0',
    'desc'  => 'Short Desc',
  ],
  [
    'title' => 'Test5',
    'desc'  => 'Short Desc',
  ],
  [
    'title' => 'Test0',
    'desc'  => 'Much Longer Than Short Desc',
  ],
  [
    'title' => 'Test0.5',
    'desc'  => 'Short Desc',
  ],
  [
    'title' => 'Test1',
    'desc'  => 'Short Desc',
  ],
  [
    'title' => 'Test1',
    'desc'  => 'Much Longer Than Short Desc',
  ],
  [
    'title' => 'Test1.5',
    'desc'  => 'Much Longer Than Short Desc',
  ],
  [
    'title' => 'Test3',
    'desc'  => 'Short Desc',
  ],
  [
    'title' => 'Test2',
    'desc'  => 'Short Desc',
  ],
  [
    'title' => 'Test3.75',
    'desc'  => 'Much Longer Than Short Desc',
  ],
  [
    'title' => 'Test3.25',
    'desc'  => 'Short Desc',
  ],
  [
    'title' => 'Test2',
    'desc'  => 'Much Longer Than Short Desc',
  ],
  [
    'title' => 'Test3',
    'desc'  => 'Much Longer Than Short Desc',
  ],
  [
    'title' => 'Test5',
    'desc'  => 'Much Longer Than Short Desc',
  ],
  [
    'title' => 'Test3.5',
    'desc'  => 'Short Desc',
  ],
  [
    'title' => 'Test4',
    'desc'  => 'Short Desc',
  ],
  [
    'title' => 'Test5',
    'desc'  => 'Much Longer Than Short Desc',
  ],
  [
    'title' => 'Test4.5',
    'desc'  => 'Short Desc',
  ],
  [
    'title' => 'Test4',
    'desc'  => 'Much Longer Than Short Desc',
  ],
  [
    'title' => 'Test5',
    'desc'  => 'Much Longer Than Short Desc',
  ],
];

foreach($inputArr as $item) {

    if ( isset($result[$item['title']]) && strlen($result[$item['title']]['desc']) > strlen($item['desc']) )
        continue;    

    $result[$item['title']] = $item;
}

$result = array_values($result);

print_r($result);

可以使用标题作为键构建新的关联数组。循环原始数组，当键存在时，检查desc的长度是否更长，否则继续，用当前项替换结果数组中的项

您还可以使用

array\u reduce

：

$result = array_reduce($inputArr, function ($c, $i) {
    if ( !isset($c[$i['title']]) || strlen($c[$i['title']]['desc']) < strlen($i['desc']) )
        $c[$i['title']] = $i;

    return $c;
});


$result = array_values($result);

print_r($result); 

$result=array\u reduce（$inputArr，function（$c，$i）{
如果（！isset（$c[$i['title']]）| strlen（$c[$i['title']]]['desc']）

分享你的解决方案，说出为什么它不起作用。我同意。让我们看看你尝试了什么，为什么不起作用。解决这个问题大约需要5-10分钟，但我们不是来“为您编码”的。如果您使用键为标题的关联数组，而不是二维数组，事情会变得容易得多。@Devon:

array\u values

只是在这里按要求将

$result

从关联数组更改为索引数组。