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Advantages of tomcat?

Can you help summarize the characteristics and advantages of tomcat? Thanks

習慣沉默 2017-05-17 09:58:03 0  3  1084

Is there a faster way to summarize key values ??in a large array of objects?

I have a large data set in the format: data=[{a:12,b:8},{a:2,c:4,d:14},{c:2,e:4,f:14} ] What I want is an object containing the sum of all keys (here a-f) and their values ??in the dataset, like this: {a:14,b:8,c:6,d:14,e :4,f:14} I can get the desired result like this: functionsum(a,b){returna+b};f...

P粉191323236 2024-02-17 17:51:31 0  1  547

python - How to execute multiple SQL statements at once

Suppose there are multiple such statements: {code...} We can summarize it into the format of select xxx from yyy. How to execute multiple such statements at one time in Python, where xxx and yyy are variable .

習慣沉默 2017-05-25 15:08:08 0  1  2208

php - What can a for loop be used for?

Many functions in PHP are implemented using for loops. For example, string conversion problems, calculating the number of executions, etc. I feel that the for loop is very useful and can solve many underlying problems. Can any expert summarize the use of for loops in programming?

高洛峰 2017-05-17 09:55:18 0  2  672

Web crawler-Introduction to Python crawler

I am about to be a sophomore, I have studied Python by myself, and I know basic grammar. I want to learn crawling, but I feel that it involves a lot of knowledge. Is there anyone who has experienced it and can summarize what they know, or how to learn Python crawling?

歐陽克 2017-07-05 10:34:11 0  3  1313

I want to develop a management system. I don't want to start from the bottom. I want to find a framework that can quickly build the front and backend. Is there anything better?

I often write notes recently to summarize and record knowledge points, so I found a more convenient document system. The editing function is very easy to use and you can preview the effect at any time through online editing. After editing, the previewed results are relatively close to those in Cloud...

冰 2019-10-16 15:58:52 0  0  1111

Log line limit for writing to Apache Errorlog from mod php error_log

I have a simple apache2.4+mod_php setup as a web server. The error_log directive in php.ini is not set, so it takes the default value of 0. The behavior is described in this (https://www.php.net/manual/en/function.error-log.php) and to summarize the end result, I see that it is forwarded to the SAPI...

P粉814160988 2024-02-03 17:43:09 0  1  556

How to declare a string variable?

The first occurrence of this variable $totpro in my code is like this $totpro=$totpro+$row['profitloss']; I want to use it to summarize all the profits, however, I get this warning message when running the warning :Variable $totpro is not defined but if I put this code before the previous code it wo...

P粉392861047 2024-04-01 22:30:49 0  1  638

Laravel Modal does not return data

I don't know why I'm not getting the value from the modal in my Laravel controller. Please check it for me. However, I use the same code for other modes and controllers. It's working and returning the value from the property without any issues. I'm using Laravel8 and php8.1; below is my code. app\Ht...

P粉174151913 2024-03-29 10:31:31 0  1  592

Can I use the automatic generation module of thinkphp5 in Windows 7 system? How to configure and use

明民 2017-10-10 17:04:14 0  2  1391

After installing the PHP toolbox, all the mysql tables in phpstudy that I installed before are gone. What should I do?

After installing the PHP toolbox, all the mysql tables in phpstudy that I installed before are gone. What should I do?

劉袁銘 2017-10-10 19:25:59 0  4  2944

mcrypt_get_key_size()

To use mcrypt_get_key_size() in php study, how to enable mcrypt_

劉袁銘 2017-10-10 19:47:34 0  1  1174

Detecting login status and preventing repeated login status in TP5 - My page is wrong

冥冥之中天注定 2017-10-10 22:49:15 0  0  1190

Issues with resending WeChat public account template messages?

For example: I am using PHP to develop WeChat public accounts. If I send a template message, the WeChat client may receive 1-3 messages. I checked Baidu and said that the WeChat server will resend in 5 seconds. How to solve this problem?

飛揚 2017-10-11 08:00:11 0  0  1141

How to install php7

我無限黑暗里的小太陽▼ 2017-10-11 09:11:44 0  1  1145

Solve (no language limit)

A census taker asked a woman, "How many children do you have and how old are they?" The woman replied, "I have three children. Their ages multiplied is 36. The sum of their ages is equal to the house number of the segregated room." Census The enumerator immediately went to the ne...

路過 2017-10-11 10:20:08 0  1  1365

There is no WWW file in the phpStudy directory. Enter localhost in the website and the hello world solution will come out directly! I created the WWW folder in the root directory and then created an abc.php. localhost/abc.php still didn't come out and an error was reported. not found

<?phpphpinfo();?>

M..moli瞎 2017-10-11 11:45:27 0  7  5212

Find an authoritative and practical development tutorial or article on WeChat scan code authorization to log in to the website

Find an authoritative and practical development tutorial or article on WeChat scan code authorization to log in to the website

極世 2017-10-11 12:33:15 0  1  1684

How to uninstall phpstudy.

whlyx 2017-10-11 15:53:03 0  2  1764

An error warning appears when phpstudy enters the database

Hirtdye 2017-10-11 17:12:35 0  2  1622