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Q&A

Welcome to Software Development on Codidact!

Will you help us build our independent community of developers helping developers? We're small and trying to grow. We welcome questions about all aspects of software development, from design to code to QA and more. Got questions? Got answers? Got code you'd like someone to review? Please join us.

General Q&A about programming, scripting, software design & architecture, process, tools, testing, and more.

Filters (None)
71%
+3 −0
How long in days is a MONTH in MySQL?

If one finds where the past number of months equals the past number of days like this, select distinct DATE_SUB(now(), INTERVAL 92 DAY),DATE_SUB(now(), INTERVAL 3 MONTH) The numbers that are curre...

1 answer  ·  posted 3y ago by Charlie Brumbaugh‭  ·  last activity 3y ago by r~~‭

71%
+3 −0
connect with SLOT/SIGNAL: QPushButton clicked signal not received by main window

I added a QPushButton to my ui file named pushButton, and manually connected it using connect. There are no errors or warnings emitted at any point in the compilation stage The button does show up...

1 answer  ·  posted 3y ago by jrh‭  ·  last activity 3y ago by jrh‭

76%
+8 −1
Styling with classes vs styling with CSS

I've noticed that a lot of sites have something like this going on: <div class="has-margin-0 has-padding-4"> <div>...</div> <div>...</div> ... </div>...

1 answer  ·  posted 3y ago by Moshi‭  ·  last activity 3y ago by luap42‭

33%
+0 −2
How do I find all the tables in a database that don't have a specific column?

I need to add one column with the same name to all of the tables in my database, how can I find which tables don't currently have a column with that name?

1 answer  ·  posted 3y ago by Charlie Brumbaugh‭  ·  last activity 3y ago by Charlie Brumbaugh‭

80%
+6 −0
Is it recommended for ASP.NET Web API actions to always include a CancellationToken?

Note: This is basically a question from Stack Overflow that was closed for a very long period of time and I fear it might get closed again as primarily opinion based. I am wondering if my ASP.NET C...

1 answer  ·  posted 3y ago by Alexei‭  ·  last activity 3y ago by Peter Taylor‭

71%
+3 −0
Include a Blazor Webassembly project into an existing ASP.NET Core project

When creating a new Blazor Webassembly project, there is a checkbox ASP.NET Core hosted where if selected will create three projects at once, a blazor webassembly project, an ASP.NET Core project, ...

1 answer  ·  posted 3y ago by ndc‭  ·  last activity 3y ago by ndc‭

71%
+3 −0
What options can be set via swing.properties?

The default Swing look and feel can be set in $JAVA_HOME/conf/swing.properties What else can be set in this file? I can't find any other documentation of it.

1 answer  ·  posted 3y ago by ajv‭  ·  last activity 3y ago by Stephen C‭

66%
+2 −0
Nodejs wrap async function in synchronous function

I am writing a spoof of the fs module; the actual storage mechanism is not the the filesystem but rather a database. Overall, however, the api will function exactly like fs. So far my code is compa...

1 answer  ·  posted 3y ago by Gershy‭  ·  last activity 3y ago by Moshi‭

60%
+1 −0
How to protect the git respository for a public_html folder on a Linux server?

On a Linux server, if you leave the .git folder unprotected in the public_html folder, its possible that someone could download the folder and then gain access to your files. There are two ways I h...

2 answers  ·  posted 3y ago by Charlie Brumbaugh‭  ·  last activity 3y ago by .                                                .‭

66%
+2 −0
Validating xsd schema that contains import from external http source in Java 11

In the example.xsd file I have an import to an external xsd file that looks like this: <schema xmlns="http://www.w3.org/2001/XMLSchema" targetNamespace="http://test.example.com" ...

0 answers  ·  posted 3y ago by Janar‭  ·  edited 3y ago by Monica Cellio‭

83%
+8 −0
Should I cast to (void) when I do not use the return value

I saw at least one compiler (Codewarrior for HC12) warn me if I use a function without using it's return value. Other compilers (clang/gcc) do not issue a warning though, even when using the std=90...

3 answers  ·  posted 3y ago by Kami‭  ·  edited 3y ago by Monica Cellio‭

50%
+1 −1
How to temporarily disable a MySQL user?

Sometimes I will need to temporarily lock out other MySQL users when I am making large structure changes and want to make sure that nobody else is inputting or changing the data. The other use case...

2 answers  ·  posted 3y ago by Charlie Brumbaugh‭  ·  edited 3y ago by Charlie Brumbaugh‭

80%
+6 −0
How to store credentials for PHP scripts on a Windows machine?

I have a number of command line PHP scripts that are either run by a user or by Windows Task Scheduler. These scripts use DB and API credentials and I am wondering if there is a better way of stori...

1 answer  ·  posted 3y ago by Charlie Brumbaugh‭  ·  edited 3y ago by Charlie Brumbaugh‭

75%
+4 −0
Generate SIGSEGV without undefined behaviour.

In order to test that coredumps are generated and that they contain useful information which can be retreived with gdb I need to generate a SIGSEGV. Or anything else which causes a coredump. The co...

1 answer  ·  posted 3y ago by Estela‭  ·  last activity 3y ago by Lundin‭

60%
+1 −0
Access TypeScript class outside bundled code

I'm developing the design framework for a certain Q&A site. We are currently using an external dependency for the tag selector on the post editor, but it has some disadvantages (not fitting int...

1 answer  ·  posted 3y ago by luap42‭  ·  last activity 3y ago by ArtOfCode‭

84%
+9 −0
Why don't format specifiers work with lists, dictionaries and other objects?

When I want to print a number or a string, I can use f-strings (Python >= 3.6) or str.format, and I can use just the variable between braces, or use format specifiers. Ex: num, text = 10, 'abc' ...

1 answer  ·  posted 3y ago by hkotsubo‭  ·  edited 3y ago by sth‭

86%
+11 −0
What is undefined behavior and how does it work?

I have created this sensational program: #include <stdio.h> int* func (void) { int local=5; return &local; } int main (void) { printf("%d\n", *func()); } This prints 5 even thoug...

1 answer  ·  posted 3y ago by Lundin‭  ·  last activity 3y ago by Lundin‭

71%
+3 −0
Can renaming a MySQL column be sped up by dropping indexes or foreign keys?

I need to rename one column in 170 tables in a MySQL database and its going really slow. The columns all have an index plus a foreign key on them, would dropping the index/temporarily removing the...

2 answers  ·  posted 3y ago by Charlie Brumbaugh‭  ·  last activity 3y ago by manassehkatz‭

60%
+1 −0
How to upgrade a recent (>= 8) Angular CLI?

Angular CLI official page indicated how to install the CLI, but provides no information about how to upgrade it. I am interested in how to upgrade the CLI.

1 answer  ·  posted 3y ago by Alexei‭  ·  last activity 3y ago by Alexei‭

86%
+11 −0
Does using an Integer have any speed/performance benefits over a string in JSON

I'm working on an API to respond some data about a bunch of orders and items. The order and item numbers are always an integer (it's the order.id and item.id value, respectively). Originally the re...

3 answers  ·  posted 3y ago by Welz‭  ·  last activity 3y ago by .                                                .‭

80%
+6 −0
Is it undefined behaviour to just make a pointer point outside boundaries of an array without dereferencing it?

I have heard that it is undefined behaviour to make a pointer point outside boundaries of an array even without dereferencing it. Can that really be true? Consider this code: int main(void) { ...

2 answers  ·  posted 3y ago by klutt‭  ·  last activity 3y ago by hkotsubo‭

88%
+13 −0
Different behavior with relative imports when using flask vs py

I have a small new Python 3.8 Flask project with some relative import quirks. For the DB I use SQLAlchemy with Flask-Migrate. My project has the following general structure: controllers/ static/ te...

1 answer  ·  posted 3y ago by luap42‭  ·  last activity 3y ago by ajv‭