I have all notes of programming languages anyone wants

I need too

Kiani sent a huge message, it has been re-uploaded as a quote Hi everyone. I'm attepmting to debug my application using lldb. But unfortunately I'm getting the error below (Wanted to attach the image but group settings doesn't allow it). Seems like std::string is not being recognized by the lldb but on the other hand image lookup -t std::string in lldb is returning type data. Any solutions? * thread #2, name = 'DrogonIoLoop', stop reason = breakpoint 1.1 frame #0: 0x00005555555ad0f2 arc`controllers::MyController::hello(this=0x0000555555619fd0, req=std::__shared_ptr<drogon::HttpRequest, __gnu_cxx::_S_atomic>::element_type @ 0x00007ffff0003cf0, callback=0x00007ffff61f7cd0) at MyController.cpp:16:32 13 HttpResponsePtr resp = HttpResponse::newHttpResponse(); 14 resp->setBody("Called!"); 15 std::string tok = "token"; -> 16 std::string token = req->getHeader(tok); 17 auto getenv = std::abs(-1); 18 callback(resp); 19 } (lldb) p req->getHeader(tok) error: arc 0x0008f9c7: DW_TAG_member '_M_local_buf' refers to type 0x00000000000a552c which extends beyond the bounds of 0x0008f9bd error: arc 0x000aaf36: DW_TAG_member '__u6_addr8' refers to type 0x00000000000aaf69 which extends beyond the bounds of 0x000aaf2c error: arc 0x000aaf42: DW_TAG_member '__u6_addr16' refers to type 0x00000000000aaf79 which extends beyond the bounds of 0x000aaf2c error: arc 0x000aaf4e: DW_TAG_member '__u6_addr32' refers to type 0x00000000000aaf89 which extends beyond the bounds of 0x000aaf2c error: Couldn't look up symbols: std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>::basic_string(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>> const&) Hint: The expression tried to call a function that is not present in the target, perhaps because it was optimized out by the compiler. (lldb) std::string j = "123" error: 'std' is not a valid command. (lldb) p std::String j="123" error: <user expression 1>:1:6: no type named 'String' in namespace 'std' 1 | std::String j="123" | ~~~~~^ (lldb) p std::string j ="123" error: <user expression 2>:1:13: no viable conversion from 'const char[4]' to 'std::string' (aka 'std::basic_string<char>') 1 | std::string j ="123" | ^ ~~~~~ note: candidate constructor not viable: no known conversion from 'const char[4]' to 'std::nullptr_t' for 1st argument note: candidate constructor not viable: no known conversion from 'const char[4]' to 'std::basic_string<char> &&' for 1st argument note: candidate constructor not viable: no known conversion from 'const char[4]' to 'const std::basic_string<char> &' for 1st argument note: explicit constructor is not a candidate (lldb)

it seems to me that there is std::String vs std::string problem (haven't looked in detail tho)

it seems to me that there is std::String vs std::string problem (haven't looked in detail tho)

But the problem is that the exact code is written and compile into the code and its working in the line 16 of the code. I'm not defining anything new as std::String but woudln't it be also problematic inside the code itself?

hard to say without looking at the code

hard to say without looking at the code

Kiani sent a code, it has been re-uploaded as a quote It is a minial project. Here's the method that is being called by the Drogon: #include "MyController.h" #include <memory> namespace controllers { void MyController::hello(const HttpRequestPtr &req, std::function<void(const HttpResponsePtr &)> &&callback) { std::cout << "Called!"; HttpResponsePtr resp = HttpResponse::newHttpResponse(); resp->setBody("Called!"); std::string tok = "token"; std::string token = req->getHeader(tok); callback(resp); } } Also MyController.h: #pragma once #ifndef MYCONTROLLER_H #define MYCONTROLLER_H #include <drogon/HttpController.h> #include <drogon/HttpSimpleController.h> using namespace drogon; namespace controllers { class MyController : public drogon::HttpController<MyController, false> { public: static std::string message() { std::string message = "hello"; std::cout << message << std::endl; return message; } public: // GET /api/hello void hello(const drogon::HttpRequestPtr &req, std::function<void(const drogon::HttpResponsePtr &)> &&callback); // // POST /api/data // void postData(const drogon::HttpRequestPtr &req, // std::function<void(const drogon::HttpResponsePtr &)> &&callback); // // // GET /api/users/{id} (Path parameters) // void getUser(const drogon::HttpRequestPtr &req, std::function<void(const drogon::HttpResponsePtr &)> &&callback, // int id); // Note the 'int id' // // // GET /api/query?name=John&age=30 (Query parameters) // void queryParams(const drogon::HttpRequestPtr &req, // std::function<void(const drogon::HttpResponsePtr &)> &&callback); METHOD_LIST_BEGIN METHOD_ADD(MyController::hello, "/hello", Get); // PATH_ADD("/api/data", Post, postData); // PATH_ADD("/api/users/{id}", Get, getUser); // Path parameter // PATH_ADD("/api/query", Get, queryParams); // Query parameters METHOD_LIST_END }; } // controllers #endif //MYCONTROLLER_H

Hii guys

How are you

Fine and you?

i am trying to write a small memory safe C++ hobby compiler, does anyone has suggestions and feed back on how to solve memory issues Without Borrow Checking, Reference Counting, or Tracing Garbage Collection

At compile time

i am trying to write a small memory safe C++ hobby compiler, does anyone has suggestions and feed back on how to solve memory issues Without Borrow Checking, Reference Counting, or Tracing Garbage Collection

Enforced raii and bounds checking everywhere. But I am afraid that would be insufficient. Enforced monadic interface could do it

But then you strayed from C++

I would not mind having free good static analysis

Enforced raii and bounds checking everywhere. But I am afraid that would be insufficient. Enforced monadic interface could do it

This is cool

This is cool

You could also add a safe and unsafe attribute, make manipulating a raw pointer or C array in a safe function illegal (be careful, because this is a raw pointer you may need to add an extra check on this) Then a properly labeled standard library would keep you safe from, specifically, memory unsafety.

You will need to make your abstractions in the standard library enforce this, and may need a unsafe_only attribute to tag things that can only be called in an unsafe context like the std::vector::operator[]

You could also add a safe and unsafe attribute, make manipulating a raw pointer or C array in a safe function illegal (be careful, because this is a raw pointer you may need to add an extra check on this) Then a properly labeled standard library would keep you safe from, specifically, memory unsafety.

I just hope i don't give up, so far it's been hard

You will need to make your abstractions in the standard library enforce this, and may need a unsafe_only attribute to tag things that can only be called in an unsafe context like the std::vector::operator[]

Also what do you think of this; i am considering writing a transpiler instead of a compiler that transpiler source code to c++ and then do all the errors and memory safety at transpiler time before the output will be compiled by standard cpp compilers (gcc, clang); just like the way kotlin and typescript work

That way i might reduce the work time it will take to write a full compiler

User Jetha has 1/2 warnings; be careful! Reason: English only

Hi, i want to generate all words with 4 letter, How can i do?

Hi, i want to generate all words with 4 letter, How can i do?

You can write a program that will do it for you or you can do it by hand

You can write a program that will do it for you or you can do it by hand

i want a program on C++

You can write a program that will do it for you or you can do it by hand

aaaa,aaab,aaac,aaad,aaae,.......................zzzz

all words are 26*26*26*26

all words are 456,976

i want a program on C++

do you know that each letter is in fact a number (ASCII codes)

do you know that each letter is in fact a number (ASCII codes)

yes

if you can, please send a program

h ghaderi sent a code, it has been re-uploaded as a quote #include "stdafx.h" #include <ctype.h> #include <stddef.h> #include <stdio.h> #include <stdlib.h> int menu(); int entertext(); void four_words(); int main() { int words; int i; while(1) { i=menu(); switch (i) { case 1:entertext(); break; case 2: four_words(); break; case 3:exit(0); default: printf("\nInvalid choice\n\n"); break; } } return 0; }

i can not send here my program

send as a file

thanks

Guys i have all programming notes

Guys i have all programming notes

ok

ok

Okay

yes

what about this approach? I am not sure if the mats is correct but you see the point. char word[] = { ('a'+i/(26*26*26)) , ('a'+i/(26*26 ))%(26 ), ('a'+i/(26 ))%(26*26 ), ('a'+i )%(26*26*26), '\0' };

no it is wrong :D

i/17576, i/676%26, i/26%26, i%26

i/17576, i/676%26, i/26%26, i%26

this is probably correct

That way i might reduce the work time it will take to write a full compiler

You may be able to use treesitter as a starting point

this is probably correct

not correct

this is probably correct

import string mylist = [] mystring = string.ascii_lowercase for a in mystring: for b in mystring: for c in mystring: for d in mystring: mylist.append(a + b + c + b) print(mylist) print("aaaa" in mylist) print("zzzz" in mylist) print("Size of list =", len(mylist)) # 456976 4-letter words... using just lowercase. # also...have a look at: mylist2 = ["".join(x) for x in itertools.product(mystring, repeat=4)] print(len(mylist2)) print("aaaa" in mylist2) print("zzzz" in mylist2) edit:- you can also do:- mylist = [a+b+c+d for a in mystring for b in mystring for c in mystring for d in mystring]

import string mylist = [] mystring = string.ascii_lowercase for a in mystring: for b in mystring: for c in mystring: for d in mystring: mylist.append(a + b + c + b) print(mylist) print("aaaa" in mylist) print("zzzz" in mylist) print("Size of list =", len(mylist)) # 456976 4-letter words... using just lowercase. # also...have a look at: mylist2 = ["".join(x) for x in itertools.product(mystring, repeat=4)] print(len(mylist2)) print("aaaa" in mylist2) print("zzzz" in mylist2) edit:- you can also do:- mylist = [a+b+c+d for a in mystring for b in mystring for c in mystring for d in mystring]

This is not C

yes, is correct Algorithm?

can you write for 2 words?

2 letters

26*26 = words

its for generating pass for 4 letters

not correct

It is correct, i tried it

i have to check it again

if its correct, can you send the text file for me? send private, thanks

output text file

THe algoritm is correct

are you sure?

are you sure?

yep c unsigned i=26*26*26; char word [] = { 'a'+i/17576, 'a'+i/676%26, 'a'+i/26%26, 'a'+i%26, 0 }; printf("%s", word);

i=26*26*26; its for 3 letters!!

it will change the first letter in array to b

i=26*26*26*2 will change it to caaa

can you send out put file?

all I have is this https://onlinegdb.com/GAMEQh9jr put it in the loop by yourself

caaa is output

i want, aaaa, aaab, aaac,..................................zzzz

so change it

Havoc sent a code, it has been re-uploaded as a quote KeyChain* keyChainMalloc(DataType type, int units, KeyChain* origin){ if (origin == NULL || units <= 0) { return NULL; } KeyChain* tail = origin; while (tail->next != NULL) { tail = tail->next; } for(int i = 1; i <= units; i++){ KeyChain* adjacent_point = (KeyChain*)malloc(sizeof(KeyChain)); adjacent_point->units = units; adjacent_point->index = tail->index + 1; adjacent_point->type = type; adjacent_point->key = NULL; adjacent_point->next = NULL; tail->next = adjacent_point; tail = adjacent_point; } return origin; } Am I correctly adding nodes to a linked list from the tail, or am I messing something up

typedef struct KeyChain{ Key* key; DataType type; int units; int index; struct KeyChain* next; } KeyChain; this is the struct if anyone wants

@admin

Reported Alvin Andrê [1431731578] to admins.​​​​​​​​​​

has anyone done scraping using c++?

has anyone done scraping using c++?

yes, people have done scraping using c++ (although why you would do such thing is unknown :) )

has anyone done scraping using c++?

I have done it. how can I help you?

Guys how do you solve these string questions? Like what is your approach in doing questions of strings. Some questions ask to convert numbers into text , these type of questions!

Guys how do you solve these string questions? Like what is your approach in doing questions of strings. Some questions ask to convert numbers into text , these type of questions!

Are you asking how to convert a numerical variable into ascii string representation in decimal?

I have done it. how can I help you?

i have experience doing it through python, can you please share a snippet i'll work my way around

yes, people have done scraping using c++ (although why you would do such thing is unknown :) )

vulnerability assessments XD

Are you asking how to convert a numerical variable into ascii string representation in decimal?

Yeah like we are given 1321 we've to return one thousand three hundred twenty one and vice versa

Yeah like we are given 1321 we've to return one thousand three hundred twenty one and vice versa

you usually just convert it to ascii then, if you want in decimal, then you do it for each 10's and add '0'.

vulnerability assessments XD

No idea what you are talking about.

you usually just convert it to ascii then, if you want in decimal, then you do it for each 10's and add '0'.

I think they want to convert numbers to words