Update RGB to Hex, build README

README.md

@@ -395,13 +395,11 @@ const reverseString = str => [...str].reverse().join('');
 
 ### RGB to hexadecimal
 
-Convert each value to a hexadecimal string, using `toString(16)`, then `padStart(2,'0')` to get a 2-digit hexadecimal value.
-Combine values using `join('')`.
+Convert given RGB parameters to hexadecimal string using bitwise left-shift operator (`<<`) and `toString(16)`, then `padStart(6,'0')` to get a 6-digit hexadecimal value.
 
 ```js
-const rgbToHex = (r, g, b) =>
-  [r,g,b].map( v => v.toString(16).padStart(2,'0')).join('');
-// rgbToHex(0, 127, 255) -> '007fff'
+const rgbToHex = (r, g, b) => ((r << 16) + (g << 8) + b).toString(16).padStart(6, '0');
+// rgbToHex(255, 165, 1) -> 'ffa501'
 ```
 
 ### Scroll to top

snippets/RGB-to-hexadecimal.md

@@ -1,22 +1,8 @@
 ### RGB to hexadecimal
 
-Convert given RGB parameters to hexadecimal string using bitwise left-shift operator.
+Convert given RGB parameters to hexadecimal string using bitwise left-shift operator (`<<`) and `toString(16)`, then `padStart(6,'0')` to get a 6-digit hexadecimal value.
 
 ```js
-const rgbToHex = (r, g, b) =>
-  ((r << 16) + (g << 8) + b).toString(16).padStart(6, '0');
+const rgbToHex = (r, g, b) => ((r << 16) + (g << 8) + b).toString(16).padStart(6, '0');
 // rgbToHex(255, 165, 1) -> 'ffa501'
 ```
-
-Think the RGB values as binary, the max value for each will be `255` in decimal and `11111111` (8-bit) in binary. So, the left most side in hexadecimal form is for red value, middle part is green, most right side is blue, as you probably already know. To summarize it over orange `rgb(255, 165, 1)`, `#ffa501` color.
-
-```
-                 255      165      1
-  (r << 16)   11111111 00000000 00000000
-+ (g << 8)    11111111 10100101 00000000
-+ (b)         11111111 10100101 00000001
-
-toString(16)     ff       a5       01
-```
-
-We simply moving values to their appropriate locations. `padStart(6, '0')` is needed for leading left most zero characters.