Convert A Hex String To RGB

kata programming

مساله:

هنگام کار با مقادیر رنگ ، گاهی اوقات می توان مقادیر جداگانه قرمز ، سبز و آبی (RGB) را برای یک رنگ استخراج کرد. تابعی را پیاده سازی کنید که این الزامات را برآورده می کند:

  • یک رشته رنگ هگزا دسیمال بدون حساسیت به حروف بزرگ و کوچک به عنوان پارامتر خود می پذیرد (به عنوان مثال “#FF9933” یا “#ff9933”)
  • یک شی با ساختار {r: 255 ، g: 153 ، b: 51} را برگردانید که r ، g و b بین 0 تا 255 متغیر است

توجه: پیاده سازی شما نیازی به پشتیبانی از حالت مختصر نگارش هگزادسیمال (یعنی “#FFF”) ندارد

مثال:

"#FF9933" --> {r: 255, g: 153, b: 51}

Description:

When working with color values it can sometimes be useful to extract the individual red, green, and blue (RGB) component values for a color. Implement a function that meets these requirements:

Accepts a case-insensitive hexadecimal color string as its parameter (ex. “#FF9933” or “#ff9933”)

Returns an object with the structure {r: 255, g: 153, b: 51} where rg, and b range from 0 through 255

Note: your implementation does not need to support the shorthand form of hexadecimal notation (ie “#FFF”)

Example

"#FF9933" --> {r: 255, g: 153, b: 51}

public class HexToRGB {
  
  public static int[] hexStringToRGB(String hex) {
    return new int[]{
      Integer.parseInt(hex.substring(1, 3), 16), 
      Integer.parseInt(hex.substring(3, 5), 16), 
      Integer.parseInt(hex.substring(5, 7), 16)};
  }
  
}
import java.util.stream.*;

public class HexToRGB {
  
  public static int[] hexStringToRGB(String hex) {    
    return IntStream.of(1,3,5).map(p -> Integer.parseInt(hex.substring(p, p+2), 16)).toArray();
  }
}
public class HexToRGB {
  
  public static int[] hexStringToRGB(String hexCode) {
        int[] rgb = new int[3];
        String[] keyValues = {"00","01","02","03","04","05","06","07","08","09","0A","0B","0C","0D","0E","0F","10","11","12","13","14","15","16","17","18","19","1A","1B","1C","1D","1E","1F","20","21","22","23","24","25","26","27","28","29","2A","2B","2C","2D","2E","2F","30","31","32","33","34","35","36","37","38","39","3A","3B","3C","3D","3E","3F","40","41","42","43","44","45","46","47","48","49","4A","4B","4C","4D","4E","4F","50","51","52","53","54","55","56","57","58","59","5A","5B","5C","5D","5E","5F","60","61","62","63","64","65","66","67","68","69","6A","6B","6C","6D","6E","6F","70","71","72","73","74","75","76","77","78","79","7A","7B","7C","7D","7E","7F","80","81","82","83","84","85","86","87","88","89","8A","8B","8C","8D","8E","8F","90","91","92","93","94","95","96","97","98","99","9A","9B","9C","9D","9E","9F","A0","A1","A2","A3","A4","A5","A6","A7","A8","A9","AA","AB","AC","AD","AE","AF","B0","B1","B2","B3","B4","B5","B6","B7","B8","B9","BA","BB","BC","BD","BE","BF","C0","C1","C2","C3","C4","C5","C6","C7","C8","C9","CA","CB","CC","CD","CE","CF","D0","D1","D2","D3","D4","D5","D6","D7","D8","D9","DA","DB","DC","DD","DE","DF","E0","E1","E2","E3","E4","E5","E6","E7","E8","E9","EA","EB","EC","ED","EE","EF","F0","F1","F2","F3","F4","F5","F6","F7","F8","F9","FA","FB","FC","FD","FE","FF"};
        for(int i = 0; i < 256; i++) if(hexCode.substring(1,3).toUpperCase().equals(keyValues[i])) rgb[0] = i;
        for(int i = 0; i < 256; i++) if(hexCode.substring(3,5).toUpperCase().equals(keyValues[i])) rgb[1] = i;
        for(int i = 0; i < 256; i++) if(hexCode.substring(5,7).toUpperCase().equals(keyValues[i])) rgb[2] = i;
        return rgb;
  }
  
}
function hexStringToRGB(h) {
  return {
    r: parseInt(h.slice(1,3), 16),
    g: parseInt(h.slice(3,5), 16),
    b: parseInt(h.slice(5,7), 16)
  };  
}
function hexStringToRGB(hex) {
  hex = parseInt(hex.substring(1), 16)
  return {r: hex >> 16, g: (hex & 0x00FF00) >> 8, b: (hex & 0x0000FF)}
}
const hexStringToRGB = hexString =>
  (([r, g, b]) => ({r, g, b}))
  (hexString.match(/\w{2}/g).map(val => parseInt(val, 16)));

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