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Questions tagged [vlang]

Questions related to the V programming language, including its syntax and its libraries.

V, inspired by Go, is a statically typed programming language that compiles to machine code. It is currently (2023-03) at version 0.3 and actively developed. It aims to be simple and as fast as C, and is targeted at systems programming, webdev, gamedev, GUI, mobile, science, embedded, etc.

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Command line parsing lib VLang

I want to write a command line application with the V programming language. Is there a library for command line parsing?
thinwybk
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V-lang shows V panic: array index out of range error for valid indexing of array after V panic is encountered once

There is this new programming language V-lang being created by Alex Medvednikov. I'm using V-lang version 0.1.11 currently. I can declare an array in V-lang like below : a := [1,2,3] // or, mut a := [1,2,3] I tried to get the last item of this…
Arkistarvh Kltzuonstev
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V - when memory gets freed

V does have neither a manual memory release, nor a garbage collector (reference counting) nor an owner-based mechanism like Rust. How does it decide when to free memory?
Thomas S.
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How would I go about creating a static library in Vlang?

I'm relatively new to Vlang, and am trying to create a static library to try and test it out. I assume it just involves compiling to C without and then creating the static library from those C files, and calling from there, but any help would be…
Albert Bennett
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Loop through an array in vlang

How can I loop over an array of strings on v programming language? For example: langs := ['python', 'java', 'javascript']
MosheZada
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What is the variable `C` in some modules in vlib?

I was trying to figure out how to use the image library in vlib, in which there was a variable C: pub fn (img Image) tex_image_2d() { mut rgb_flag := GL_RGB if img.ext == 'png' { rgb_flag = GL_RGBA } …
Lee Garcon
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How vlang compile static binary?

i have tried v -b native -prod hello.v but most modules are not supported. // hello.v println('Hello, World!') How vlang compile static binary ? Updated : i found another parameter -freestanding for static compile. $ v -freestanding hello.v $ file…
Vivian K. Scott
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Convert a string to an array in vlang

I'm learning V, and as far as my attempts go, although a V string is an array of bytes, array methods are not applicable to strings. So I want to convert a string to an array. I have tried searching for this with no success, I found something in Go,…
Phu Nguyen
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V-lang: How to send +2500 HTTP requests per second?

I am planning to write my scraper with V and i need to send estimatedly ~2500 request per second but can't figure out what am i doing wrong, it should be sending concurrently but it is deadly slow right now. Feels like i'm doing something really…
Yagiz Degirmenci
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V: iterate the characters (runes) of a string

According to my understanding, a string in V is wrapped around a byte array encoded as UTF-8. That way, iterating over all string elements returns the bytes: fn main() { s := 'a string with äöü (umlauts)' println(s) for i := 0; i <…
Thomas S.
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How to use C libraries in Vlang for basic statistics

I want to do basic statistics with Vlang. Can I use C libraries? For example, Apophenia: http://apophenia.info/ Or IMSL C stat library: https://docs.roguewave.com/en/imsl/c/8.6/pdf/C_Stat_library.pdf Thanks for your help.
rnso
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2D array using loops, bizarre output?

This is a very basic question, but I can't figure out what is happening. I expect nested for loops in V to work like in C and other languages. Using the following for loops to build a 2D array A, I get an unexpected result. What am I doing wrong?…
AboAmmar
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Vlang module calls confusion

Basics | main.v | beta.v | |__ parent | mod1.v | |__ child | mod2.v Codes: main.v import parent import parent.child as pc fn main(){ parent.name_parent() pc.name_child() } mod1.v module parent pub fn name_parent(){ …
Immature trader
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Does the V language allow to extend base types?

In V language methods are defined separately from the data structures. Does the V language allow to define methods on base types, like Array? Is it possible to write my_method method like fn (array Array) my_method() { ... } list := ["a",…
Alex Craft
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Can there be more than one struct member per line?

Can I have more than one struct member per line? I was making a struct. It seems like V enforces only one member per line. I don't recall seeing that mentioned anywhere. trial.v:191:2: error: unknown type `` 189 | fsize int 190 | …
aMike
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