php - Since foreach operates on a copy of the original array, why can it still change the original array when written like this?

The foreach loop uses a copy of the original array. Why can the original array be changed after reference assignment? {Code...} This section can prove that the foreach operation is a copy of the original array, and the original array was lost in half during synchronization. On the way, the internal ...

三叔 2017-06-22 11:53:30 0  4  1097

How to implement delay queue when operating kafka in php

For example: How to implement a delay queue using PHP when operating Kafka? I know that Java can implement this delay queue, but I want to know if the same function can be achieved using PHP.

U2  2022-09-15 16:12:34 0  0  711

Why is the PHP configuration of predis operation redis cluster not recorded?

Why is the PHP configuration of predis operation redis cluster not recorded? 21-1 Is there a section in your hand at the end?

@smash 2019-06-29 09:38:32 0  0  1037

javascript - How to operate an array to split the colon and extract the corresponding value.

{Code...} How to operate an array elegantly, take out the numbers before and after the colon and match them together? Sorry, I didn't express it clearly; I need to get the number after the colon, so I put my thoughts together. {code...}

ringa_lee 2017-07-04 13:44:39 0  6  1709

node.js - How to batch update a set of data in mongo and perform an insertion operation when the data in the array does not exist?

For example, I have a tag table in mongo. The data model is as follows {code...} Now I have an array of tag names, such as ['mongoDB', 'node.js', 'mysql'], and I want to update the popularity in batches. If you find that there is no such tag, insert it and implement operations like {code...}, but no...

淡淡烟草味 2017-05-24 11:35:41 0  2  1026

When inserting data encapsulated by the PHP class, the insertion is always unsuccessful and false is returned;

<?php //Database operation class class Model{ Private $host; //Database address Private $user; //Database username Private $pwd; /

A _ Ｑ _ｉ_ 2021-10-13 10:21:27 0  6  1039

python - Questions about NumPy array operations

{Code...} numpy array, with a total of tens of thousands of elements. Now I want to retain the number 000001 or the like in front of each element, and remove duplicates, leaving only a unique number. The result should be ['000001','000002','000003','000004'] In addition to using the for statement, i...

ringa_lee 2017-06-30 09:56:09 0  3  1341

How to operate such array in php

<?php //////The currently queried data $redata = array( 0=>['id'=>1,'name'=>'Zhang San','age'=>22,'hobby'=>'study'], &nbs

大叔刘 2018-08-24 13:33:02 0  3  982

Laravel - Create arrays and arrays of objects in PHP

I'm trying to create an array of objects in laravelphp. So far I have achieved this. When I return the array I get the response, I added the image for clarity. I get this output and I want to create a response like this...[{"student":"JaimeThomas","subjects":[{"sub...

P粉298305266 2024-03-30 17:17:36 0  1  505

javascript - How to implement asynchronous loop query nesting

Assume that there is an existing student dictionary array, and the students have names and classroom numbers. First, query the schools that meet the conditions, facilitate the student dictionary array, create a student object and assign the name, school and class, but the class needs to first query ...

ringa_lee 2017-07-05 10:36:27 0  1  970

php - Array reorganization help~~

The following arrays have the same gid and require Num to be accumulated. Those with different gid are displayed directly without any operation. How to achieve array deduplication? {code...}

伊谢尔伦 2017-06-06 09:54:16 0  3  727

PHP two-way queue example explanation

PHP two-way queue example explanation, how to operate?

手机用户753787856 2022-04-25 00:19:22 0  1  1136

The hosts file is empty. How to configure the local domain name?

The hosts file is empty. How to configure the local domain name? Please enlighten me. After following the tutorial of the PHP tool, nothing happens. Do you need to operate the empty hosts file according to the guidance of the PHP tool? The hosts file is empty. How to configure the local domain name?...

A李玉龙 2019-01-08 12:49:50 0  2  1218

将Including array as a dependency in useEffect

There is some data coming in from the long poll every 5 seconds and I want my component to dispatch an operation every time an item of the array (or the array length itself) changes. How can I prevent useEffect from going into an infinite loop when passing an array as a dependency, but still manage ...

P粉748218846 2023-10-17 18:50:23 0  2  597

I would like to ask if PHP can read the mssql record set directly and store it directly into an array? Thank you

It used to be asp, but now it is transferred to php. For example, $sql = "SELECT * FROM abcDB"; //Record 20 records. How to get a two-dimensional record set and store it in an array at one time. Reason: After the database operation is completed, I want to disconnect. The data is slowly cir...

stock2 2019-04-27 20:02:10 0  1  990

javascript - How to determine the length of empty array elements in JS

{Code...} val is an array after the splice(0, 1) operation. I want val.some to return false in the situation shown below.

淡淡烟草味 2017-05-19 10:12:26 0  2  542