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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)
66%
+2 −0
Is it possible to disable the "mysql: [Warning] Using a password on the command line interface can be insecure" warning?

For my purposes, it is secure enough to use passwords to execute MySQL commands on the command line, what I would like to do is disable the warning that says, mysql: [Warning] Using a password on ...

1 answer  ·  posted 4y ago by Charlie Brumbaugh‭  ·  last activity 4y ago by Alexei‭

89%
+15 −0
How should we share some content between two otherwise-independent git repositories?

We have two teams, dev and doc, and I'd like them to have shared access (via git) to a common subset of content. Specifically, I would like the examples that are used in the doc and that are scrip...

4 answers  ·  posted 4y ago by Monica Cellio‭  ·  last activity 4y ago by Monica Cellio‭

50%
+2 −2
Mocking tempnam() with vfsstream

How do I mock tempnam() with vfsStream for code that uses it to create temporary files (for example, in a PHPUnit test)?

1 answer  ·  posted 4y ago by tyteen4a03‭  ·  last activity 4y ago by summea‭

50%
+2 −2
What is REST and how different it is from HTTP? [closed]

Based on my understanding HTTP is something client and server speak in, I mean it is like a language for a server and client to communicate(not exactly a programming language). Then how to understa...

0 answers  ·  posted 4y ago by aditya98‭  ·  closed 4y ago by Alexei‭

44%
+2 −3
What is the latest, efficient way to create a login page in JAVA?

I am a noob Java programmer. I want to create a simple login page with just username and password. So I have to combine Java and HTML. While googling I found that Servlets do the job but people are...

1 answer  ·  posted 4y ago by aditya98‭  ·  last activity 4y ago by meriton‭

85%
+10 −0
What is CPU endianness?

I was fooling around with the following C code on my trusty old x86 PC: #include <stdint.h> #include <stdio.h> int main (void) { uint32_t u32 = 0xAABBCCDD; uint8_t* ptr = (u...

1 answer  ·  posted 4y ago by Lundin‭  ·  last activity 4y ago by Lundin‭

83%
+8 −0
Is it correct to run code inside a method whose object has been destroyed?

Consider an object for which a method is invoked. Beyond certain point the method no longer accesses this at all. No read/writes of non-static members. No invocation of non-static methods. Is it ...

1 answer  ·  posted 4y ago by Estela‭  ·  last activity 4y ago by Hyperlynx‭

77%
+5 −0
F-bounded polymorphism, interface operators, and type inference in C#

C# language version 8.0 introduces limited support for static methods, operators, etc. in interfaces. However, there are still limitations. I was hoping to use the new language features to try a ge...

0 answers  ·  posted 4y ago by Peter Taylor‭

80%
+6 −0
Interpreted language: What is its benefit for being written in that way ?

Whenever I search in google why a specific language is interpreted language, I get differences between compiled languages and interpreted languages but nowhere the benefit for being interpreted rat...

3 answers  ·  posted 4y ago by aditya98‭  ·  last activity 4y ago by Olin Lathrop‭

85%
+10 −0
Destroy std::mutex referenced but not owned by std::unique_lock?

Is it correct to destroy a mutex which is referenced but not owned by an unique_lock as in this code? { std::unique_ptr<std::mutex> mutex = std::make_unique<std::mutex>(); std::u...

1 answer  ·  posted 4y ago by Estela‭  ·  last activity 4y ago by Angew‭

c++
75%
+4 −0
Declaring interface members with generic return types: "The type parameter [generic type] cannot be used with type arguments"

I'm trying to write an interface to define the set of operations I expect my repositories' Unit of Work implementations to have, and I want this interface to be fulfilled by EF Core's DbContext cla...

2 answers  ·  posted 4y ago by Marc.2377‭  ·  last activity 4y ago by Marc.2377‭

72%
+6 −1
How to separate DB query logic from the application other than implementing a repository on top of an ORM?

I've been doing a lot of reading on implementing the repository pattern in C# projects and found controversy, or shall I say some strong criticism, made by seemingly very smart people with previous...

1 answer  ·  posted 4y ago by Marc.2377‭  ·  last activity 4y ago by Alexei‭

71%
+3 −0
What are the factors to consider when deciding to split ORM queries or use eager loading?

I have extensive working experience with Entity Framework ORM and have noticed two major ways of writing LINQ (LINQ2SQL): lot of eager loading: the most prevalent, uses (lots) of Includes to eag...

0 answers  ·  posted 4y ago by Alexei‭

57%
+2 −1
How to filter data from the view using MVVM Pattern?

I am trying to filter data in the DataGrid using the texboxes using the MVVM pattern. Just not sure how to do it. Would appreciate any guidance. My current code: Model public class Technical_Bes...

1 answer  ·  posted 4y ago by gzi98‭  ·  last activity 4y ago by FoggyFinder‭

85%
+10 −0
Scheme for cross-platform warning control?

tl;dr I'd like to learn a compact, cross-compiler way of selectively suppressing compiler warnings. Consider the case where you really mean to make an exact floating-point comparison using ==, o...

1 answer  ·  posted 4y ago by dmckee‭  ·  last activity 4y ago by Someone‭

75%
+4 −0
Capture args from repeatable flags in Golang pflags package

How do I create a flag that can be used multiple times in a command using the pflag package? For example, let's say I wanted to select multiple fields and did not want to have to use comma-separati...

1 answer  ·  posted 4y ago by qohelet‭  ·  edited 4y ago by Alexei‭

72%
+6 −1
What are the pros and cons of using objects vs associative arrays for JSON results of a CURL request in PHP?

I have a PHP script that uses CURL to return a JSON result that looks //Curl set up code $result = curl_exec($ch); //Error checking code $json = json_decode($result, true); //Code to process r...

1 answer  ·  posted 4y ago by Charlie Brumbaugh‭  ·  last activity 4y ago by Yaskur‭

75%
+4 −0
Resize HTML canvas with respect to inner content

I am currently making an esoteric language which requires a theoretically infinite canvas. Basically, it should be able to resize and fit the contents of the drawing in and outside it's existing bo...

0 answers  ·  posted 4y ago by Razetime‭

75%
+7 −1
How to choose backend technology for my project?

I am planning to build a "Customer Management Portal" as a hobby project using technologies like HTML,CSS,JavaScript,JAVA,JDBC,Oracle Database.The description of the portal is: 1)Customer details ...

3 answers  ·  posted 4y ago by aditya98‭  ·  last activity 4y ago by Matthewericfisher‭

81%
+7 −0
.elf file - What contributes to the resulting .bin file size?

I have found this nice library for parsing/writing .elf files as output by e.g. the GCC toolchain: ELFIO I have a bare metal embedded project with an ARM Cortex M target. My goal is to overwrite...

0 answers  ·  posted 4y ago by sktpin‭  ·  edited 4y ago by sktpin‭

30%
+1 −5
How can software track [1] how many subscribers to subreddits, [2] if subreddit is private, [3] if submissions are restricted?

Master lists like 82 food subreddits and 128 tech subreddits don't indicate each's subscribers. if it's private. Sometimes moderators can make the sub private for several days, to clean i...

1 answer  ·  posted 4y ago by TextKit‭  ·  last activity 4y ago by r~~‭

20%
+0 −6
What do smaller cloud companies offer that Big Tech clouds don't? [closed]

I don't understand why American Virtual Cloud Technologies, Inc and other similar teeny cloud computing platforms still exist, and haven't either gone bankrupt, or been acquired by one of Big Tech...

0 answers  ·  posted 4y ago by TextKit‭  ·  closed 4y ago by Alexei‭

80%
+6 −0
Fail to send DICOM C-Echo, although DICOM Association seems successful.

I am building an Android app to perform a DICOM C-Echo. (DICOM is a standard for storing and transferring medical images; the specification is at dicom.nema.org). My purpose is to learn more about ...

0 answers  ·  posted 4y ago by FractionalRadix‭  ·  edited 4y ago by FractionalRadix‭

84%
+9 −0
How to override default string formatter?

It is possible to create a new formatter class by subclassing string.Formatter class and then to use it like myformatter.format("{foo:customformat}", foo=foo). It's not super-convenient though, and...

1 answer  ·  posted 4y ago by luser‭  ·  edited 4y ago by Alexei‭

66%
+2 −0
Tampermonkey userscript prevents pages from loading

I am currently making a userscript to interpret the APL programming language in a Stackexchange chat window. This is the code I have come up with: // ==UserScript== // @name APL chat // @ver...

1 answer  ·  posted 4y ago by Razetime‭  ·  last activity 4y ago by Razetime‭

71%
+3 −0
How to manage views and stored procedures in an ASP.NET Core project?

I am slowly modernizing an older ASP.NET Core Web API and one of the steps involved migrating from database first to code first. Now, all schema changes and seeding is covered by migrations which ...

0 answers  ·  posted 4y ago by Alexei‭

66%
+2 −0
Confusion about using std::async with class member function

So,I'm having a doubt when I call std:async() on a member function of a class. The book I'm reading says (emphasis mine) You can also pass a pointer to a member function to async(). In that case...

1 answer  ·  posted 4y ago by hamsasimon‭  ·  last activity 4y ago by C. K. Young‭

60%
+1 −0
Is it necessary for a build server to remove node_modules before an AOT build?

I am currently dealing with an Angular application that is being deployed using an CI orchestrator and Jenkins. Jenkins job is configured to do the following (relevant steps only): fetch source...

2 answers  ·  posted 4y ago by Alexei‭  ·  last activity 4y ago by Derek Elkins‭

42%
+1 −2
Resources for learning Julia [closed]

I have decide to try out Julia. Is anyone aware of some good resources to get started with the language?

0 answers  ·  posted 4y ago by Guilherme Costa‭  ·  closed 4y ago by Alexei‭

66%
+2 −0
Keras image_dataset_from_directory - how image size works

I am using tf.keras.preprocessing.image_dataset_from_directory. According to the documentation, the related image_size parameter is the Size to resize images to after they are read from disk. How...

0 answers  ·  posted 4y ago by Guilherme Costa‭  ·  edited 4y ago by Alexei‭

81%
+7 −0
Pros and cons of various type_traits idioms

My work tasks have recently started requiring me to use the type_traits header to restrict the classes that may be used in template functions, methods, and classes. And while I used it for a long t...

1 answer  ·  posted 4y ago by dmckee‭  ·  edited 4y ago by Marc.2377‭

77%
+5 −0
When should I use wait() instead of get() when using C++ threads

I'm trying to understand the purpose of the wait() function in Class future<> for C++. At the moment I don't see any purpose for calling wait() instead of get(). What I have tried in code: i...

1 answer  ·  posted 4y ago by hamsasimon‭  ·  last activity 4y ago by Derek Elkins‭

75%
+10 −2
What are the pros and cons of a composite primary key versus a unique constraint?

Let's say we have two tables A and B and a join table C that has foreign keys to both A and B and the combination of those foreign keys is unique. One could either do a unique constraint or a comp...

2 answers  ·  posted 4y ago by Charlie Brumbaugh‭  ·  edited 4y ago by Alexei‭

80%
+6 −0
Is it unsecure to use a password on the command line to run a MySQL script on Windows?

Its possible to execute a MySQL file from the command line like so, mysql -u USER -pPASSWORD < FILENAME which triggers a warning, mysql: [Warning] Using a password on the command line int...

2 answers  ·  posted 4y ago by Charlie Brumbaugh‭  ·  edited 4y ago by ghost-in-the-zsh‭

66%
+4 −1
How can I write an egrep (grep -E) regexp that matches lines containing two stanzas in arbitrary order?

I have line-based data on the form x1=y2; a3=b4; c5=d6; ... Matching this with a extended regular expression is fairly straightforward; for example, one can do something not entirely dissimilar...

3 answers  ·  posted 4y ago by Canina‭  ·  last activity 4y ago by hkotsubo‭

66%
+4 −1
What's the difference between null pointers and NULL?

Someone told me that I shouldn't write "NULL pointer" with capital letters, because a null pointer and NULL are different terms. And that NULL is a "null pointer constant". What's the meaning of th...

3 answers  ·  posted 4y ago by Lundin‭  ·  last activity 4y ago by EJP‭

83%
+8 −0
How do I find the order that yields the shortest path?

The Problem I have a path optimization problem that in some ways reminds me of the Traveling Salesman Problem, but differs in some key respects. I have a group of items that need to be used by a m...

1 answer  ·  posted 4y ago by matthewb‭  ·  edited 4y ago by matthewb‭

16%
+0 −8
Delete specific cells with shift cells up

Answers to Excel - Get only values from column that are not Zero “0” asked by @CiscoNewb includes ones applying AGGREGATE: =IFERROR(INDEX(A:A,AGGREGATE(15,6,ROW(A$2:A$12)/(A$2:A$12>0),ROW(A1)))...

0 answers  ·  posted 4y ago by pnuts‭  ·  edited 4y ago by luap42‭

66%
+2 −0
What are the cons of directly mocking Entity Framework DbSets instead of working with an in-memory database when unit testing the application?

I have recently contributed to a Clean Code project and had a discussion about how to implement unit tests. The project author argues for using an in-memory database (which easily replaces the rea...

1 answer  ·  posted 4y ago by Alexei‭  ·  last activity 4y ago by Goyo‭

71%
+3 −0
Union of queries depending on variable in list

I have a big Cypher query that is depending on a variable. Example: With REGION = 'Canada' query I want to execute this query several times based on different values on a list and return the UN...

1 answer  ·  posted 4y ago by Guilherme Costa‭  ·  edited 4y ago by Alexei‭

66%
+2 −0
Search paths where all nodes are in a relationship with same node

Using the below graph as an example: I am trying to determine all Persons which are_sons of Persons all born in the same country. Is there an elegant way to achieve this with Cypher?

1 answer  ·  posted 4y ago by Guilherme Costa‭  ·  last activity 4y ago by r~~‭

66%
+2 −0
How much memory is allocated for a MySQL VARCHAR variable in a stored procedure?

In a stored procedure let's say I have a VARCHAR variable, DECLARE example_variable VARCHAR(100); how much memory is allocated to it and is that independent of the length of the data in the var...

2 answers  ·  posted 4y ago by Charlie Brumbaugh‭  ·  last activity 4y ago by Alexei‭

75%
+4 −0
Static and thread_local initialization order

Is there any guarantee regarding initialization of static and thread_local objects? In example, is there any guarantee about the value printed by the following program? #include<iostream> s...

1 answer  ·  posted 4y ago by Estela‭  ·  edited 4y ago by Alexei‭

90%
+18 −0
Does the location of an import statement affect performance in Python?

When writing Python-based apps (e.g. Django, Flask, etc.), it's often the case that import statements can be found all over the place, often more than once for the same module. For example, you can...

1 answer  ·  posted 4y ago by ghost-in-the-zsh‭  ·  last activity 4y ago by ghost-in-the-zsh‭

66%
+2 −0
How to automatically run Entity Framework Core migrations for an application which uses a user with read/write rights on certain tables?

I have decided to convert a legacy database-first ASP.NET Core project to code-first. However, I have noticed that the project used the same database as another bigger project and the Entity Framew...

1 answer  ·  posted 4y ago by Alexei‭  ·  last activity 4y ago by Alexei‭

83%
+8 −0
Is MISRA-C useful outside safety-critical and embedded programming?

When discussing best or safest C programming practices with various C gurus on the Internet, the "MISRA-C guidelines for the use of C language in critical systems" often pops up as a source. This ...

1 answer  ·  posted 4y ago by Lundin‭  ·  last activity 4y ago by ghost-in-the-zsh‭

54%
+4 −3
How can I make --reset-author the default?

I do a lot of rebasing and amending of my topic branches. I don't think it's especially useful for me or my colleagues to see in the logs what date it was when I first started working on the partic...

3 answers  ·  posted 4y ago by Hyperlynx‭  ·  last activity 4y ago by Charlie Brumbaugh‭

git
75%
+4 −0
Unable to `mount` overlayfs in Docker container when inside a LXC with a ZFS pool

Summary/Context I'm currently working to improve performance and throughput of our automation infrastructure, most of which is a combination of Bash/Shell scripts, Python scripts, Docker, Jenkins,...

1 answer  ·  posted 4y ago by ghost-in-the-zsh‭  ·  last activity 4y ago by ghost-in-the-zsh‭

75%
+4 −0
Is there a way to automatically fix MySQL tables where the auto_increment has fallen behind the correct value?

Due to a series of unfortunate events I have some tables where the auto_increment value got behind what it should be. If the auto_increment value is 9 and there are 20 rows in the table the next 1...

1 answer  ·  posted 4y ago by Charlie Brumbaugh‭  ·  last activity 4y ago by Alexei‭

71%
+3 −0
In PHP what is the use case for include instead of require when including PHP scripts?

In PHP one can either use include or require to include files, the difference is that if the file doesn't exist it will emit a fatal error and halt with a require and only emit a warning with inclu...

1 answer  ·  posted 4y ago by Charlie Brumbaugh‭  ·  last activity 4y ago by Marijn‭

php