Created
June 17, 2019 06:29
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6/9/19 Cassido's weekly interview problem - Convert Hex to RGB
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| =begin | |
| Converts hex codes to rgb | |
| https://www.mathsisfun.com/hexadecimals.html | |
| supports hashtag and non hashtag | |
| @param s string to be converted to RGB | |
| @return RGB representation of a string | |
| =end | |
| def hex_to_rgb(s) | |
| if s[0] == "#" #removes '#' from evalutation | |
| s = s[1..s.length] | |
| end | |
| if s.to_s.length < 6 | |
| abort("String must be exactly six characters.") | |
| end | |
| table = | |
| {"0" => 0, "1" => 1, "2" => 2, "3" => 3, "4" => 4, "5" => 5, "6" => 6, "7" => 7, "8" => 8, "9" => 9, "A" => 10, "B" => 11, "C" => 12, "D" => 13, "E" => 14, "F" => 15 } | |
| r = s[0..1] | |
| num_1 = table[r[0]] * 16 + table[r[1]] | |
| g = s[2..3] | |
| num_2 = table[g[0]] * 16 + table[g[1]] | |
| b = s[4..5] | |
| num_3 = table[b[0]] * 16 + table[b[1]] | |
| "(#{num_1}, #{num_2}, #{num_3})" | |
| end | |
| puts hex_to_rgb("#FF0000") #(255, 0, 0) | |
| puts hex_to_rgb("FFD700") #(255, 215, 0) | |
| puts hex_to_rgb("#808080") #(128, 128, 128) - Grey |
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