Is there a manual for termux? I have no idea what each command does

I'm working on a bash script that navigates through a cloud path, and I'm getting the error -bash: [[: gs://: syntax error in expression (error token is "://")

To me, this indicates that bash is attempting to evaluate the variable instead of comparing strings, but I have no clue why that would be the case.

This is the relevant code:

GSPATH='gs://'
if [[ "$GSPATH" -eq 'gs://' ]]; then
    echo 'empty'

I need to create a table with summary statistics on a data frame, and I want to group 4 similar columns (N_cases, percent) into 2 broader columns (incident, prevalent), so it would look like this:

| Prevalent | Incident |
|    N | %  |   N | %  |

I originally asked this question on The Microchip Forums

I recently installed the MIPS QEMU emulator and tried implementing a simple function that hammers a character to the screen

#define UART_BASE 0x1F000900
#define UART_LSR 0x00000030


void print_char(char c)
{
    for(int i=0; i<1; i--)
    {
        *(volatile char *)(UART_BASE) = c;
    };
}

I thought maybe my UART address was incorrect, but according to the MIPS Malta manual I'm on the right track. I called the function here in src/init.c

extern void clear_bss(void);
extern void print_char(char);

void
init(void)
{
    char letter = 'h';
    clear_bss();
    print_char(letter);
    return;
}

My linker script seems fine as well

MEMORY
{
    ram (rwx) : ORIGIN = (0x8+0x01000000), LENGTH = 128M
    flash (rx) : ORIGIN = 0xbfc00000, LENGTH = 4M
}

SECTIONS
{
    .text : ALIGN(4)
    {
        KEEP(*(.ivt))
        *(.text*)
        . = ALIGN(4);
        _etext = .;
    }>flash


    .bss : ALIGN(4)
    {
        __bss_start = .;
        *(.bss)
        *(COMMON)
        __bss_end = .;
    }>ram
}

_stack = ORIGIN(ram)+LENGTH(ram)

After compilation I stripped the ELF headers and padded the binary to 4 megabytes. I then tried running it using qemu-system-mips -pflash bin/boot.bin -nographic -M malta

It compiles just fine. QEMU seemingly runs it just fine (minus a warning on auto-detecting formats.)

I need help figuring out what I'm doing wrong.

Thanks in advance.

I have a feeling I'm stuck in tutorial hell, and I need to start actually building things. But I don't know where to start :/

Also I'm really bad at syntax. I only know concepts like for loops, while loops, if-elif-elses, etc...

So maybe something that helps me learn more about coding syntax would be helpful.

Thanks!

Today I did a git push --force, then I had to create a branch out of the old code, but other times I had to save the files I worked on, delete the local repository, git clone again, then reapply my fixes. I want to at least have a bookmark on how to fix things in the future.

Yes, I've heard about VSCode plugins, that supposed to help. But no, I don't want to use a glorified webpage to do coding, regardless if it's directly tied to Micro$lop, or some of the slop was removed by 3rd parties. I tried KATE once, I cannot go back to some sluggish webpage, which only argument for use at the moment is "but it has plugins".

The official repository is for the PipeWire server does not have a separate folder for include files (well, it only contains Valgrind files), and I don't want to skim through a lot of docs to select what needs for audio, then reconstruct it in a text editor.

Holy shit! It's so easy and accesible. The best part is that it's simpky build in to linux (or wsl). It's just a terminal command "vimtutor".

I'm astonished that nobody has ever told me about this before.

cross-posted from: https://programming.dev/post/47452240

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All the tutorials I can find is just telling me to jUSt UsE tHe DefAUltS (or even to use SDL or some similar library instead of my own solution), but some more advanced features such as getting HD rumble working on controllers with such features would require to connect to select devices.

So far I've tried:

• using library functions, but they give weird results for some reason.
• reading the contents of /proc/asound/cards, which supposed to work and contains some very useful addresses, but not the PCM handles themselves.

Unfortunately, 99% of my search results is about how to configure ALSA to be used in Linux, which is obviously not what I need.

I know I have to add my projects and make the lists more visually appealing. But I am getting lazy reading books :P

I saw one example

int x = 10;
int y = 5;

bool isGreater = x > y;

printf("%d", isGreater);

But I could write this

int x = 10;
int y = 5;

printf("%d", x > y);

I am a complete beginner and I have no real reason why I would or would not want to deal with boolean variables, but I want to understand their raison d'être.

Edit: typo city

There's this snd_pcm_open() function, and one of its arguments takes "ASCII identifier of the PCM handle". How can I get it for each individual devices?

I have been learning Java through the Java MOOC and I find the workbook-style approach of learning very effective for me. Basically, I'm looking for resources, offline or online that have plenty of exercises.

Preferably, they should clearly define the tools that I'm allowed to use (because there are many ways to code for a problem), and have some ability to give feedback, for example if it's a physical book it should provide some input and output tests for self-checking.

Currently I'm having an issue with WASAPI when using the format reported by the OS and it's WAVEFORMATEXTENSIBLE (which is needed for certain devices, or else the audio stream won't open with E_INVALIDARGS all for standard IEEE floating point format WITH NO CHANGES!!!), meaning I get no sound even though the stream is initialized and stuff.

However, every time I try to search any WASAPI related issues, all I get is either 10+ years old stackoverflow posts at best (I'd rather die a painful death than to re-register to that hellsite - I got a year long ban every time I posted there, once exactly due to asking about WASAPI, and all I got told to just use SDL, meanwhile SDL forums instead wanted me to use a 3rd party DLLs for live audio playback, by writing it first to a WAV file(!!!)), and otherwise my search result is instead flooded with general purpose Windows troubleshooting tips.

No, I also don't want to use AI slop. I don't know whether the sycophancy of AI or the elitism of stackoverflow users are worse.

I like writing the Game of Life as a helloworld program when learning graphics libraries because the naive algorithm is very easy to implement. It is however pretty slow. I want to try writing something more efficient than doing a whole pass through the board each frame, so I wonder which "fast" algorithm is more or less easy to understand and implement?

I feel this post had pretty good answers in the replies, and figured it's a post people learning programming might want to see.

I need it to get low level access to some PlayStation Dualsense controller features, such as adaptive triggers and setting colors.

UPDATE: The function is missing from the VTables likely due to vibe coding, but I found a workaround. Opening the device's pnpPath as a file will grant you evdev-like access to the device.

This question comes mainly from curiosity. I'm not quite sure how to phrase it best. Especially in a title. But I'm wondering if say you have one thread writing to a variable of an essentially primitive type and one thread reading them at the same time if there's any likelihood of the read happening while the variable is half written causing either weird values or undefined behavior.

Take something like a value of 8 bits from 00010101 to 11101000.

I'm imagining if say 4 bits are written while we try to read it the result could be something like

11100101

To play around i made this small sample rust. It passed without making garbage. Printing at first a bunch of lines stating "String = Hello!" and second "String = Hi!" without weirdness or issues. I kind of half-expected something like "String = #æ鼨A" or a segfault.

use std::thread::{self, JoinHandle, sleep};

const HELLO: &str = "Hello!";
const HI: &str = "Hi!";

struct ExemptSyncStringSlice<'a>(&'a str);

unsafe impl Sync for ExemptSyncStringSlice<'_> {}

fn print_ptr(pointer: *const ExemptSyncStringSlice)
{
	for _ in 1..500
	{
		unsafe
		{
			println!("String = {}", (*pointer).0);
		}
	}
}

fn main()
{
	
	static mut DESYNC_POINTER: ExemptSyncStringSlice = ExemptSyncStringSlice(HELLO);

	let join_handle: JoinHandle<()> = thread::spawn
	(
		|| {
			print_ptr(&raw const DESYNC_POINTER);
		}
	);
	sleep(time::Duration::from_millis(1));
	unsafe { DESYNC_POINTER.0 = HI; }
	
	join_handle.join().unwrap();
}

• It tries its best to default to master.
• it always creates a master branch.
• it throws a bunch of errors when trying to push to main.
• I always have to do some random fiddling to make it work with the main branch, but at least once I made master the main one instead.
• it ruined a few releases of mine, by publishing the older branch.
• apparently this is very abnormal, and no one saw things like this.
• every time I initialize a new repo, I make sure to run a git clone to initialize it on my PC, which is called main, then it defaults to master for no known reason.
• checked the .gitconfig file, and nothing unusual.

I have been taking a class called solve it this holiday to learn programming with LLM assisting. The result was fun. One of the projects I did was building platonic solids paper templates. I wish i had learnt these in my geometry class.

After hand building a template for each of the shapes, I thought I just want an LLM build one for me by giving it the shape that I wanted. Surprisingly this is really hard for them. They can't get a single one right. https://share.solve.it.com/d/c6ca11ce650450ab2bb38b5193dac44e

Then my teacher joined and help me make it better (but llm still cannot fo it): https://share.solve.it.com/d/cb0c3b8d182b040de1b20a078b04ec98