php实现数组的合并
最近做一个报表,要求若某几项相同就合并这几行,并将数字项相加显示。
首先考虑遍历数组,拿出数组的最后一项跟其它项比较,若符合条件则做合并操作并删除该项。
但是实际运行,发现执行3次后就不执行了,而这时的数组长度是6.一直没搞懂为什么不继续执行了。数组是采用&引用删除的,删除项确影响到了原数组的。
后来想到一个办法,既然删除会影响遍历,那就不删除,而是将该项的值设置为空。问题就解决了,最后用array_filter过滤下空值就可以了。
代码如下
//合并itemsearch的结果 private function mergeList(&$arr) { $data = array(); $n = &$arr; foreach ($n as $key => $value) { if(!$value) continue; array_push($data,$this->getItem($value,$n)); } return array_filter($data); } private function getItem(&$item,&$arr){ foreach ($arr as $key => $value) { if(!$value) { continue; }; if($item["itemTypeName"] == $value["itemTypeName"] && $item["weight"] == $value["weight"] && $item["type"] == $value["type"]){ if($item["itemTypeId"] == $value["itemTypeId"] && $item["warehouseId"] == $value["warehouseId"]){ continue; }else{ $item["stockIn"] += $value["stockIn"]; $item["remain"] += $value["remain"]; $item["stockOut"] += $value["stockOut"]; $item["stockIn"] = sprintf("%.4f",$item["stockIn"]); $item["remain"] = sprintf("%.4f",$item["remain"]); $item["stockOut"] = sprintf("%.4f",$item["stockOut"]); $arr[$key] = ""; } } } return $item; }

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


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

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Atom editor mac version download
The most popular open source editor

SublimeText3 Linux new version
SublimeText3 Linux latest version

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

SublimeText3 English version
Recommended: Win version, supports code prompts!

SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.