given that the elements in an array $arr, array are 0 to NMagi N < = $NMMI 1, find out whether there are any duplicate elements. The time complexity is O (n), and the space complexity is O (1) ....
the company uses Aliyun s ECS server, which used to be a server (centos7) + a disk, and the environment and code were all put together. Once, when configuring the environment, the system file was deleted by mistake, so that the system could not boot. L...
ask what is the development environment and language of short video playback software similar to Douyin requirements: if developers only have JAVA and front end now, what is the best development environment? is it okay to use Hbuilder s MUI? wi...
135..... I want to calculate the most expensive "price " * "amount " can be multiplied normally, but there will be a problem with the sum ...
RT, checks the log and finds that at the same time, accurate to seconds, there are multiple requests for the same method, and the parameters are the same, and all are executed, resulting in multiple messages being inserted into the database. The server i...
recently in the interview, I was asked: can the http header be customized? since I usually don t care much about and use custom http headers, I read this article directly after saying that I don t know : https: blog.csdn.net fdipzon. also tried. The...
http page failed to send https request with ajax. Is there a good solution? ...
recently, I am working on a multilingual website. I have a headache and hope that the gods can show me the way. Please ...
read several laravel permission management packages, such as https: github.com mrterryh P., https: github.com spatie lar., which are all based on operations, for example, if you have read_articles permission, you can read all articles. If I want to l...
now I want to achieve such a function, that is, there is a sharing icon on the pc web page, and users can share the content with Wechat friends after scanning the QR code. How should this function be realized? Ask for divine assists ...
I try to develop a third-party platform using EasyWechat, and then I will help local merchants or official accounts run some activities. How to quickly transfer the official account fan data Synchronize to the local database to facilitate operation afte...
$data = [ [ foo => bar , x => foo ], [ foo => bar1 , x => foo1 ], [ foo => bar , x => foo2 ] ]; I need to delete the duplicate array of foo in this array, leaving only one item. How do...
Code of html: PHP: : localhost: ...
there is a requirement: A notice is sent to specify who can read it. the simplest solution to take advantage of mysql: message Information Table id Information ID name content < hr > message_user user View Information Table id message_id Inf...
after painstaking configuration, https, has been able to visit successfully. ,404 and using http to access, the interface can get the data? Why is that? Please give me some advice! ...
this is the code for HTML: <!DOCTYPE html PUBLIC "- W3C DTD XHTML 1.0 Transitional EN" "http: www.w3.org TR xhtml1 DTD xhtml1-transitional.dtd"> <html xmlns="http: www.w3.org 1999 xhtml"> <head> <...
I see others say that header headers can pass token values. How do you pass them? Can you give me an example? ...
PHP interface process { public function process() { echo aaaaa ; } } class event { private $m; public function __construct($me) { $this->m = $me; } public function click () { echo ffff ; }...
I develop with vue, and then npm run build generates front-end pages. now copies the generated pages to the back-end project, which feels very inefficient. is there a better way to deploy it after it is generated at once? Thank you! ...
error log: [Sat May 05 20:24:44.208053 2018] [mpm_winnt:crit] [pid 15392:tid 312] AH02538: Child: Parent process exited abruptly. Child process is ending Starting the Apache2a service The Apache2a service is running. [core:warn] [pid 15004:tid 420] AH...
problem description vue.js I keep switching routes. The memory under IE increases with the switching of routes. I also destroy some of the events that should be destroyed in the beforeDestroy lifecycle, which is why. the environmental background of ...
ask the boss to explain this high-order function. I don t understand . ...
official example: https: ant.design components... how to control how to position the current scroll bar to the top of the table when you turn the page? This ensures that the list data is read from top to bottom each time you turn the page. the curr...
problem description when using Promise, resolve keeps reporting errors error TS2304: Cannot find name resolve . the environmental background of the problems and what methods you have tried modified the lib parameter in tsconfig..json, but the ...
use golang to develop the gin framework for backend api,. Now every time you finish writing an interface, you need to run go build xxx to perform a compilation, then execute the compiled binary file, and then debug the interface. There is a problem in...