just merge the lines

Thats cool

Like from 5 10 To 5+10 right

yes

that -d flag adds +

Neat

awk '{sum += $2}END{print sum}'

I need to learn more of awk.. That looks superb

awk is awkward, but useful

why awkward? is good

awk '{sum += $2}END{print sum}'

Mind explaining?

awk '{sum += $2}END{print sum}'

but bruh wouldn't that give just 0?

Mind explaining?

its pretty simple. awk reads file line by line(you should pass file name as second argument). second column is $2

but bruh wouldn't that give just 0?

why would it?

no initial value

every awk variable is initialized to 0

its pretty simple. awk reads file line by line(you should pass file name as second argument). second column is $2

I know just print $2

What is that END section?

gets executed at the end of the file, after all lines have been read

What is that END section?

code to execute when script is about to finish

Damn that genious

I dont need python anymore

wierd

wierd

Um no cut

How does it relate to c++?

wierd

no. just use standalone awk, without cut

Um no cut

ah right

awk '{}' <filename>

yeah

awk '{}' <filename>

I dont even need cat? Nice

Again

Again

Reverse enginnering, hacking and related topics are allowed, but asking to hack facebook, instagram, etc. is NOT allowed. Also if you ask "how to become a hacker" and obviously have zero knowledge on anything related to that you may get warned or banned.

How does it relate to C++?

I dont even need cat? Nice

don`t need. actually almost every unix tool can read file

Reverse enginnering, hacking and related topics are allowed, but asking to hack facebook, instagram, etc. is NOT allowed. Also if you ask "how to become a hacker" and obviously have zero knowledge on anything related to that you may get warned or banned.

There's no word about Bash

An awk interpreter can be written in C and C++, there's the (granted, distant), relation

There's no word about Bash

that's no bash also

How does it relate to C++?

more efficient way than c++

it's awk

Can someone help me? I'm trying to normalize a vector2<float>, in a game I'm creating in SFML, When my player moves to the right the velocity is 30.0f, when it moves to the top the velocity is 30.0f, but when this two things happens together, the player moves faster, how can make it equal the the others? I try this: d * sqrt(2) = 30 (player's velocity) But the player moves too slow.

(sorry for the large msg)

You need to calculate horizontal and vertical components of speed and velocity separately

How so?

x and y vector. hypotenuse from x ° y angle

We

well, that's normalization does.

u can boost the player's speed in every way u design

try tinkle it in some test/ dump case first

Hey guys, how can I paste the text copied from Windows into the text file in the remote Linux?

Just by command line

I meant projection of speed on 2d plain

Thanks, I try to implement that.

I'll try*

Sorry I should have said velocity

Right now i was studing critical section problem in OS, where we have to synchronize the critical section code to resolved the issue of share "resources". What are these resources and how can i access these resources in c/c++ program?

Right now i was studing critical section problem in OS, where we have to synchronize the critical section code to resolved the issue of share "resources". What are these resources and how can i access these resources in c/c++ program?

there resources are basically everything in your memory, barely any operations are thread safe

For example?

And how can i access them?

For example?

a global variable/shared memory

Is a global variable is stored in stack

doesn't matter where they are stored

Stack memory is cleaned after the code is executed

So it would never be counted in mutual exclusion as it would never be causing an issue to another code..

Stack memory is cleaned after the code is executed

Depends on OS or program

yes, but it doesn't matter in that case (btw, in the C++ standard there is no such concept as stack and heap, it's just how it's implemented)

So it would never be counted in mutual exclusion as it would never be causing an issue to another code..

x is basically valid the whole lifetime of the program, so you can do whatever with it, although being on the stack int main() { int x = 0; // do something with &x }

yes, but it doesn't matter in that case (btw, in the C++ standard there is no such concept as stack and heap, it's just how it's implemented)

In c we use malloc to dynamically store in heap memory In cpp we use new to dynamically store in heap memory Else we can store in stack directly

In c we use malloc to dynamically store in heap memory In cpp we use new to dynamically store in heap memory Else we can store in stack directly

that's basically how every system implements it, yet the standard does not mention it

This seems confusing 😅

U mean we cannot use stack and heap in standard c++ compiler?

again, my point being, when talking about Critical Sections and race conditions it does not matter whether you're accessing heap or stack memory

U mean we cannot use stack and heap in standard c++ compiler?

What is void* malloc(size) to you anyway?

Compiler only knows the return type and the argument type for malloc

malloc can be anything

It could even be a macro

again, my point being, when talking about Critical Sections and race conditions it does not matter whether you're accessing heap or stack memory

But it must be mutually exclusive

But it must be mutually exclusive

I mean it we cannot share the resource

And depending on runtime

Malloc can change significantly

What is void* malloc(size) to you anyway?

No, my question was on recources