@programminginc - страница 2454

Indolent

Thanks for all of this help today. You're a pro!

Indolent

string s(1, 5);

Indolent

Does this means something?

Indolent

Or something like: string s(1, sample[5]) // here sample is a string eg: string sample = "abcd";

Cengizhan

Or something like: string s(1, sample[5]) // here sample is a string eg: string sample = "abcd";

No, actually this constructor fills string with the second parameter, times of second parameter.

Cengizhan

string s(2, 'n') -> "nn" for example.

Cengizhan

In your case, 5 is not ASCII character you cannot see what written in string probably. You should give valid character as a second parameter to string constructor if you want to use this one.

Anonymous

no, it's only a cookbook

There is actually a library with it

Anonymous

/get

Sasuke

I have a dynamic array of strings. Some elements contain tokens symbols like (|, &&, ||, ;) for example array ={"ls", "-la&&", "echo", "done"} So I want to proceess differently the elements before symbol and elments after symbol. How can I split the elements such that array look like this array ={"ls", "-la", "&&", "echo", "done"}

Martin

I have a dynamic array of strings. Some elements contain tokens symbols like (|, &&, ||, ;) for example array ={"ls", "-la&&", "echo", "done"} So I want to proceess differently the elements before symbol and elments after symbol. How can I split the elements such that array look like this array ={"ls", "-la", "&&", "echo", "done"}

You write a parser.

Martin

The simple but limited way is to hand write state machines to only split settings at the appropriate location.

Martin

The more complex also powerful approach is to use something like Flex/Bison to generate a full-blown parser. And use the parser to parse.

Sasuke

The simple but limited way is to hand write state machines to only split settings at the appropriate location.

But location isn't fixed it's depended on input from user

Sasuke

The more complex also powerful approach is to use something like Flex/Bison to generate a full-blown parser. And use the parser to parse.

What are these things

Martin

But location isn't fixed it's depended on input from user

So you need a state machine or something like it. You have to write a lot of code to determine when a spilt should happed within a loop that iterates over the entire string.

Martin

Plain 'split' won't do it.

Martin

What are these things

flex and bison are parser generators. Tell them what input is like. They generate a parser for the input

Sasuke

So you need a state machine or something like it. You have to write a lot of code to determine when a spilt should happed within a loop that iterates over the entire string.

I have to itearate over each element and create another dynamic array and copy elements with a split

Martin

More or less, yes

Sasuke

More or less, yes

I also have single array of chars too if operation on that is easier

Martin

I also have single array of chars too if operation on that is easier

Do it on the array of chars. It will be a lot easier

Sasuke

Do it on the array of chars. It will be a lot easier

So I have to do something like this "ls -la&& echo done" convert it to "ls -la && echo done"

Sasuke

Space around symbol

Martin

Yes. You need to write a loop manually to do it. Create another array of chars thats long enough. Loop through the input array of characters. If you find a special symbol after a normal character. Add a space to the new array before copying the character

Sasuke

Yes. You need to write a loop manually to do it. Create another array of chars thats long enough. Loop through the input array of characters. If you find a special symbol after a normal character. Add a space to the new array before copying the character

Thing is again it's user depended it may or may not contain a leading or trailing space

Sasuke

So I may end up adding extra space

Martin

Thing is again it's user depended it may or may not contain a leading or trailing space

Handle thats in your code. Just check if the character before the special one is a space or not

Martin

So I may end up adding extra space

This is where things get really tricky. The simple solution I described above have a lot of edge cases. It might insert extra spaces when it shouldn't (let's say, in a quoted string)

Martin

The only 100% correct way is to write a parser according to sh/bash/zsh 's grammar rules. It's gonna be very hard

Martin

But the simple way will get you 90% there.

Sasuke

This is where things get really tricky. The simple solution I described above have a lot of edge cases. It might insert extra spaces when it shouldn't (let's say, in a quoted string)

I don't wanna end the project in between

Sasuke

Am already stressed

Sasuke

But the simple way will get you 90% there.

I will go the simple way

Dima

Okay

Aurora

who use cocos2d-x

Pavel

who use cocos2d-x

#meta

I_Interface

lol

Taha

Hello guys what is the perfect library in c++ to work with encryption and thank u

Hermann

Hello guys what is the perfect library in c++ to work with encryption and thank u

Gmp

Taha

Gmp

Thanks bro

数学の恋人

how does arbitrary precision in float work in C++? I have seen few libraries that provide arbitrary precision, like GMP, fprecision (Modified GMP), LEDA's bigfloat, etc. But I don't seem to find how they are actually doing it. I know I can just read the source code, but it's too long and I'm in kinda hurry and I want to implement it myself

Artöm

They store array of ints and use formulas to calculate stuff

数学の恋人

They store array of ints and use formulas to calculate stuff

ah wait I guess elementary maths will be useful if that's the case

Artöm

It definitely is

数学の恋人

it seems overwhelming once but isn't much of a deal

数学の恋人

thanks for reminding, very much appreciated.

Taha

Can i see the code source

Wisenky

https://github.com/tensorflow/tensorflow how do they compile this projects written in many languages

Anonymous

https://github.com/tensorflow/tensorflow how do they compile this projects written in many languages

Build rules are present in the repository I suppose

Artöm

https://github.com/tensorflow/tensorflow how do they compile this projects written in many languages

They may have multiple executables and/or bindings in same repo

correctmaninwrongplace

Hello, i have a doubt, if i call std::vector<int> second (4); it will create a vector of 4 elements or just will create an empty vector with space for 4 elements?