初学者有关问题,关于数组的,请提供算法,多谢
菜鸟问题,关于数组的,请提供算法,谢谢
$arrItem = array(
Array ('code'=>10000,'name'=>'中国','s'=>1),
Array ('code'=>30000,'name'=>'法国','s'=>50),
Array ('code'=>30000,'name'=>'法国','s'=>100),
Array ('code'=>10000,'name'=>'中国','s'=>3),
Array ('code'=>20000,'name'=>'美国','s'=>2),
Array ('code'=>30000,'name'=>'法国','s'=>5)
);
本来是如上数组,我想得到:
$arr = array(
Array ('code'=>10000,'name'=>'中国'),
Array ('code'=>20000,'name'=>'美国'),
Array ('code'=>30000,'name'=>'法国')
);
一时摸不着头绪,求各位提供办法,谢谢了!
------解决方案--------------------
- PHP code
[[email protected] htdocs]$ php test.php<?php /*函数名不区分大小写*/$arrItem = array( Array ('code'=>10000,'name'=>'中国','s'=>1), Array ('code'=>30000,'name'=>'法国','s'=>50), Array ('code'=>30000,'name'=>'法国','s'=>100), Array ('code'=>10000,'name'=>'中国','s'=>3), Array ('code'=>20000,'name'=>'美国','s'=>2), Array ('code'=>30000,'name'=>'法国','s'=>5));foreach ($arrItem as &$elem) { unset($elem['s']);}print_r($arrItem);?><br><font color="#e78608">------解决方案--------------------</font><br>
- PHP code
$arrItem = array(Array ('code'=>10000,'name'=>'中国','s'=>1),Array ('code'=>30000,'name'=>'法国','s'=>50),Array ('code'=>30000,'name'=>'法国','s'=>100),Array ('code'=>10000,'name'=>'中国','s'=>3),Array ('code'=>20000,'name'=>'美国','s'=>2),Array ('code'=>30000,'name'=>'法国','s'=>5));//先删掉二维数组中的最后一个元素for($i = 0; $i ';//删除重复元素$ar_tmp = array();foreach($arrItem as $v) $ar_tmp[] = implode(',', $v);$ar_tmp = array_unique($ar_tmp);$result = array();foreach($ar_tmp as $v) $result[] = explode(',', $v);print_r($result);<br><font color="#e78608">------解决方案--------------------</font><br>
------解决方案--------------------
- PHP code
//6楼代码有点问题,木有保留键名,改一下$arrItem = array(Array ('code'=>10000,'name'=>'中国','s'=>1),Array ('code'=>30000,'name'=>'法国','s'=>50),Array ('code'=>30000,'name'=>'法国','s'=>100),Array ('code'=>10000,'name'=>'中国','s'=>3),Array ('code'=>20000,'name'=>'美国','s'=>2),Array ('code'=>30000,'name'=>'法国','s'=>5));function ar_unique($ar) { $result = array(); for($i = 0; $i ';print_r(ar_unique($arrItem));/*Array( [0] => Array ( [code] => 10000 [name] => 中国 ) [1] => Array ( [code] => 30000 [name] => 法国 ) [2] => Array ( [code] => 20000 [name] => 美国 ))*/<br><font color="#e78608">------解决方案--------------------</font><br>来个一劳永逸的函数
- PHP code
$arrItem = array(Array ('code'=>10000,'name'=>'中国','s'=>1),Array ('code'=>30000,'name'=>'法国','s'=>50),Array ('code'=>30000,'name'=>'法国','s'=>100),Array ('code'=>10000,'name'=>'中国','s'=>3),Array ('code'=>20000,'name'=>'美国','s'=>2),Array ('code'=>30000,'name'=>'法国','s'=>5));print_r(array_group($arrItem, 'name', 'code,name'));function array_group($ar, $k, $fields='*') { if(! is_array(current($ar))) return $ar; //是一维数组则返回原数组 if(! is_array($fields)) { if($fields == '*') $fields = array_keys(current($ar)); else $fields = explode(',', $fields); } foreach($ar as $row) { $t = array(); foreach($fields as $p) $t[$p] = $row[$p]; $res[$row[$k]] = $t; } return array_values($res);}<div class="clear"> </div>

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

Many users will choose the Huawei brand when choosing smart watches. Among them, Huawei GT3pro and GT4 are very popular choices. Many users are curious about the difference between Huawei GT3pro and GT4. Let’s introduce the two to you. . What are the differences between Huawei GT3pro and GT4? 1. Appearance GT4: 46mm and 41mm, the material is glass mirror + stainless steel body + high-resolution fiber back shell. GT3pro: 46.6mm and 42.9mm, the material is sapphire glass + titanium body/ceramic body + ceramic back shell 2. Healthy GT4: Using the latest Huawei Truseen5.5+ algorithm, the results will be more accurate. GT3pro: Added ECG electrocardiogram and blood vessel and safety

Why Snipping Tool Not Working on Windows 11 Understanding the root cause of the problem can help find the right solution. Here are the top reasons why the Snipping Tool might not be working properly: Focus Assistant is On: This prevents the Snipping Tool from opening. Corrupted application: If the snipping tool crashes on launch, it might be corrupted. Outdated graphics drivers: Incompatible drivers may interfere with the snipping tool. Interference from other applications: Other running applications may conflict with the Snipping Tool. Certificate has expired: An error during the upgrade process may cause this issu simple solution. These are suitable for most users and do not require any special technical knowledge. 1. Update Windows and Microsoft Store apps

Part 1: Initial Troubleshooting Steps Checking Apple’s System Status: Before delving into complex solutions, let’s start with the basics. The problem may not lie with your device; Apple's servers may be down. Visit Apple's System Status page to see if the AppStore is working properly. If there's a problem, all you can do is wait for Apple to fix it. Check your internet connection: Make sure you have a stable internet connection as the "Unable to connect to AppStore" issue can sometimes be attributed to a poor connection. Try switching between Wi-Fi and mobile data or resetting network settings (General > Reset > Reset Network Settings > Settings). Update your iOS version:

Title: Example of using the Array.Sort function to sort an array in C# Text: In C#, array is a commonly used data structure, and it is often necessary to sort the array. C# provides the Array class, which has the Sort method to conveniently sort arrays. This article will demonstrate how to use the Array.Sort function in C# to sort an array and provide specific code examples. First, we need to understand the basic usage of the Array.Sort function. Array.So

php提交表单通过后,弹出的对话框怎样在当前页弹出php提交表单通过后,弹出的对话框怎样在当前页弹出而不是在空白页弹出?想实现这样的效果:而不是空白页弹出:------解决方案--------------------如果你的验证用PHP在后端,那么就用Ajax;仅供参考:HTML code

Microsoft has released a preview version of the Unity extension for Visual Studio Code. This new Unity extension will allow you to write and debug Unity games. This new Unity extension brings some popular features already available in Visual Studio and Visual Studio Tools for Unity, making C# in Visual Studio Code better for Unity development. Currently, the Unity extension for VSCode provides the following: A Unity debugger for debugging your Unity editor and Unity player. Unity-specific C# analyzer and refactoring. Uni

When programming in PHP, we often need to merge arrays. PHP provides the array_merge() function to complete array merging, but when the same key exists in the array, this function will overwrite the original value. In order to solve this problem, PHP also provides an array_merge_recursive() function in the language, which can merge arrays and retain the values of the same keys, making the program design more flexible. array_merge

In PHP, there are many powerful array functions that can make array operations more convenient and faster. When we need to combine two arrays into an associative array, we can use PHP's array_combine function to achieve this operation. This function is actually used to combine the keys of one array as the values of another array into a new associative array. Next, we will explain how to use the array_combine function in PHP to combine two arrays into an associative array. Learn about array_comb
