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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.

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2.7k posts
 
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Q&A Would a MySQL database run more efficiently with smaller varchar lengths?

The manual writes: In contrast to CHAR, VARCHAR values are stored as a 1-byte or 2-byte length prefix plus data. The length prefix indicates the number of bytes in the value. A column uses one len...

posted 4y ago by meriton‭  ·  edited 4y ago by meriton‭

Answer
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+8 −4
Meta Site scope - draft proposal [duplicate]

EDIT: This discussion thread is mostly obsolete now that a new draft has been posted on the site. Please take further discussion & proposals to this meta post instead: Community feedback: What ...

6 answers  ·  posted 4y ago by Lundin‭  ·  closed as duplicate 4y ago by Lundin‭

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Q&A How to do "out-of-source" build properly with cmake?

Whenever I've worked with CMake-based projects, the structure has been something like this: project src <-------- typically this is a source control working directory CMakeLists.txt ...

posted 4y ago by Hyperlynx‭  ·  edited 4y ago by Hyperlynx‭

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Q&A How to temporarily disable a MySQL user?

I think the closest thing to what the post body is suggesting is offline mode: Connected client users who do not have the SUPER privilege are disconnected on the next request, with an appropriate...

posted 4y ago by Alexei‭  ·  edited 4y ago by Alexei‭

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Meta Strategy to migrate meaningful content from Stack Overflow

Please note that migrate in this context means grabbing the exact post as-is from a SE site and importing it here. This is allowed, with attribution given, as per licensing model. Codidact staff c...

posted 4y ago by Lundin‭  ·  edited 4y ago by Lundin‭

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Q&A What is the difference between a hook and a code injection?

I would define a hook as: A piece of code which changes the response to a certain event, without changing the original code that caused the event How is that different than "code injection", if a...

2 answers  ·  posted 4y ago by deleted user  ·  last activity 3y ago by BobJarvis‭

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Q&A Having trouble adding include directories

Ah. There's a good reason the compiler says it can't find the file: it's not there. In my particular case, BeepBoop.hpp actually gets automatically generated from other files by the ordinary build ...

posted 4y ago by Hyperlynx‭

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Q&A How do I choose the correct Perl module from these variations?

When looking for Perl modules to handle JSON strings and/or documents, I found JSON::PP and JSON::XS. The documentation of JSON::PP says it is compatible with JSON::XS. What do these suffixes me...

2 answers  ·  posted 4y ago by ghost-in-the-zsh‭  ·  last activity 10mo ago by ivan‭

Question perl json perl-module
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Meta Do we really need the [tools] tag?

No, it's not helpful, it's far too broad and doesn't make sense to use in combination with any other tag either. It can't be used for searching or categorizing questions either.

posted 4y ago by Lundin‭

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Q&A How to pivot text?

Perhaps (if a process of several relatively familiar steps is easy to remember) but additional formulae may be appropriate, a little extension to the source data required and some formatting. Howev...

posted 4y ago by pnuts‭  ·  last activity 3y ago by Alexei‭

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Meta Where should I ask git questions?

Questions about Git should be asked in Software Development. This is a case of bringing the question to the experts. Git is a general purpose version control system, that can be used to version an...

posted 7mo ago by matthewsnyder‭

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Q&A How does a client verify a server's SSL certificate? What are the specific steps?

I have little to no idea what happens after a client obtains the server's certificate. It has to make sure that it (somehow) valid, but how?

1 answer  ·  posted 1y ago by toraritte‭  ·  edited 1y ago by toraritte‭

Question ssl-certificate
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Q&A Building a language model completely from scratch

This is not feasible as described. To learn LLMs, you can look at models like 3B WizardLM. These are open source and should be possible to just train and run as is. The build may be very complex, ...

posted 1y ago by matthewsnyder‭

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Q&A How to create an object, call one of it's methods and pass it as an argument as a oneliner?

It's not clear from the question if the requirement is based on lines or statements. If what you care about is lines of code, you can put all three statements on one line. This doesn't do much for...

posted 3y ago by deleted user

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Q&A How do I strip file extensions from URLs with H2O?

I'm trying to use H2O to serve a multi-file PHP website without routing—just having a separate PHP file for every page. The relevant part of my H2O config currently looks like this: paths: "/":...

1 answer  ·  posted 3y ago by Ullallulloo‭  ·  last activity 3y ago by jminer‭

Question h2o path-mapping
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Meta Questions easily answered by studying a beginner-level book

Downvote them for now. If it becomes a common problem, then create a close reason of no-research, and close them. Such questions should not be "answered" in comments. First, comments aren't for ...

posted 3y ago by Olin Lathrop‭

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Q&A Problems with data structures and filestreams.

My advice to you is to break this down into smaller problems and try to solve them one at a time, making sure you have a program that can compile and run at each step. First: figure out how to suc...

posted 3y ago by r~~‭

Answer
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Q&A Comparing two excel files with Python based on changes

I have two tables: Table1: Name Description Amount 123 Description123 123 456 Description456 456 789 Description789 666 101 Description777 101 133 De...

1 answer  ·  posted 3y ago by sfrow‭  ·  last activity 3y ago by ibmx‭

Question python pandas
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Q&A cannot initialize a variable of type 'CFDictionaryRef'

Background story: I'm on mac OS 11.6 and would like to access an identifier for the current space/desktop from the command line. I found a helpful article at https://ianyh.com/blog/identifying-spac...

1 answer  ·  posted 3y ago by foobar‭  ·  edited 3y ago by Alexei‭

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Q&A java.lang.UnsupportedClassVersionError: when trying to connect to JDBC with JDK 14 in Eclipse

I'm trying to connect to a db file in my project but having some troubles. I'm using JDK 14 with ojdbc11 however I am still getting this when trying to connect: java.lang.UnsupportedClassVersionEr...

1 answer  ·  posted 3y ago by cuzzo‭  ·  edited 3y ago by Alexei‭

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Q&A What is Backus–Naur form as applied in computer programming?

What is Backus–Naur form as applied in computer programming? From Wikipedia In computer science, Backus–Naur form (/ˌbækəs ˈnaʊər/) or Backus normal form (BNF) is a metasyntax notation for cont...

1 answer  ·  posted 3y ago by deleted user  ·  last activity 3y ago by r~~‭

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Q&A Python looping 300 000 rows

Based on my last question comes new one. How to loop over 300 000 rows and edit each row string one by one? I have a list of 11-digit numbers stored in one single column in Excel, and I need to s...

1 answer  ·  posted 3y ago by sfrow‭  ·  last activity 3y ago by NoahTheDuke‭

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Meta Specify framework / library version in the answer

We already have such a text field. In fact, we have several: The big one we type our answer into, and the small one we type our comments into. And this approach even allows to specifically express ...

posted 3y ago by meriton‭

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Q&A Why content delivery networks often require a www. redirect?

Other than their preferred configuration options, nothing really "requires" that a particular resource be behind a particular subdomain. Content Delivery Networks (CDNs) are often just setup as sep...

posted 3y ago by ghost-in-the-zsh‭

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Q&A Is the concept of a PHP lint feasible?

When I review JavaScript files in various text editors (Visual Studio Code, Greasemonkey/Tampermonkey) I sometimes get notified about syntax errors. I never encountered this behavior with PHP file...

2 answers  ·  posted 3y ago by deleted user  ·  last activity 3y ago by nelson777‭

Question php