All Questions

19771 questions

1 answers
439 views
0

Can I use a non-existent source email address for zabbix?

Can I use a non-existent address in my zabbix event notification email?The default address of zabbix ([email protected]) will cause the SMTP server to bounce.Error in action visible from zabbix event...

postfix sendmail zabbix

1 years ago

2 answers
490 views
0

Should I use StringBuffer or StringBuilder for SQL statement assembly?

There are Tomcat, which is accessed by multiple people at the same time, and web applications that run on IIS.SQL statements are dynamically assembled within the application, taking into account on-sc...

java spring

1 years ago

1 answers
301 views
0

Please let me know how to change the image.

I am currently learning front-end technology.Could someone tell me how to change the image of the code below?Thank you for your cooperation.console.clear();const canvas= document.getElementById(hero-l...

javascript ui

1 years ago

2 answers
319 views
0

Code Execution Causes Undefined btn_click Error

If you enter the following code in Python 3, you get the error btn_click is not defined, and btn2_click is not defined in the same way.Where should I change to work without errors?import tkinter# scre...

python python3

1 years ago

2 answers
415 views
0

Code Execution Causes Undefined btn_click Error

python python3

1 years ago

2 answers
369 views
0

Heap-buffer-overflow occurs when trying to implement adjacency lists

Code below in Darwin environmentc++-std=c++17-g3-fsanitize=address main.cc&./a.out results in heap-buffer-overflow.After trying various things, it seems that the symptom is probably occurring in G...

c++

1 years ago

1 answers
240 views
0

When I write a two-dimensional array in AtCoder, I cannot determine the cause of RE (execution time error) in some problems.

Heap-buffer-overflow occurs when trying to implement adjacency listsThis is a continuation of the problem I asked you about on this link, but I have not been able to determine the cause of the RE (run...

c++

1 years ago

1 answers
355 views
0

How to swing row_number in the order in which values are entered

I would like to enter a fixed value from the program side and search the database for the value.When I return it, I would like to return it in the order of program input.So I'd like to use the ID in t...

postgresql

1 years ago

1 answers
372 views
0

No Labels or Text Boxes Appear in GroupBox on PowerShell

I'd like to have some groups in the subform and create text, labels, etc. in those boxes.This is an image that creates an input form.Below is the code for the part that is in question#Subforms$optionf...

powershell

1 years ago

5 answers
336 views
0

To collect tags that do not contain a class of tags in Python web scraping

code:blok[0].find_all('span')out[(11/20 11:46), , (11/20 11:04), , &...

python web-scraping beautiful-group

1 years ago

- 66 -

Popular Tags

python x 4647

android x 1593

java x 1494

javascript x 1427

c x 927

c++ x 878

ruby-on-rails x 696

php x 692

python3 x 685

html x 656