Συνδεδεμένοι δεκαεξαδικό σε κείμενο αποκωδικοποιητή

How can I parse RGB color in web color format (3 or 6 hex digits) to Color from image/color? Does go have any built-in parser for that?I want to be able to parse both #XXXXXX and #XXX colors formats.color docs says nothing about it: https://golang.org/pkg/image/color/but this task is very common, so I believe that go has some functions for that (which I just didn't find).

Update: I created small Go library based on accepted answer: github.com/g4s8/hexcolor

I'm trying to convert "Hello" to 48 65 6c 6c 6f in hexadecimal as efficiently as possible using the command line.

I've tried looking at printf and google, but I can't get anywhere.

Any help greatly appreciated.

Many thanks in advance,

Hi I have to convert std::string into std::vector<unsigned char>. Let's assume string which contains 14 characters: 020000040800F2 and vector v should contains 7 values. In the real program string will be a little bit longer.

std::vector<unsigned char> v(7);v[0] = 2; // 02v[1] = 0; // 00v[2] = 0; // 00v[3] = 4; // 04v[4] = 8; // 08v[5] = 0; // 00v[6] = 242; //F2

I am writing in C++17. I was looking for known solutions in algorithm but there are not which could help me.Thank you so much guys for your help.

I have a hex string : 81 61 08 0a a0 80 04

now I want to reverse it like : 04 80 a0 0a 08 61 81

I have tried converting hex to number and then reversing it and convert back to hex but it doesn't provide the required result.

My application has a limit input of 16 hex characters to represent 8 ASCII characters. The only characters I need are A-Z and 0-9. I do not need lower cases or any non-standard alphanumeric characters. A 2 character hex can represent all of the characters on the keyboard, but I don't need all of it.

Is there some type of library that can compress the alphanumeric string to be able to fit it in 16 hex characters?

Example:

12345678 = 31 32 33 34 35 36 37 38

I want to be able to pack in more alphanumeric characters like this:

ABCDEFGHI12345678 = 31 32 33 34 35 36 37 38

Is there a library that does this?