Ilya Pimenov ilya-pimenov
ilya-pimenov
/ rgb2hsl.lua
Created
January 13, 2014 22:49
Lua function to convert RGB color representation to HSL
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| local function rgb2hsl(r, g, b) | |
| local max, min = math.max(r, g, b), math.min(r, g, b) | |
| local h, s, l = (max + min) / 2, (max + min) / 2, (max + min) / 2 | |
| if max == min then | |
| h, s = 0, 0 -- achromatic | |
| else | |
| local d = max - min | |
| local s = nil | |
| if l > 0.5 then |
ilya-pimenov
/ hsl2rgb.lua
Created
January 13, 2014 22:48
Lua function to convert HSL color representation to RGB
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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| local function hsl2rgb(h, s, l) | |
| local r, g, b = nil, nil, nil | |
| if s == 0 then | |
| r, g, b = l, l ,l -- achromatic | |
| else | |
| local hue2rgb = function(p, q, t) | |
| if t < 0 then | |
| t = t + 1 | |
| end |
ilya-pimenov
/ aggregateop.png
Last active
February 17, 2016 11:09
Full article here — http://ilyapimenov.com/blog/2013/11/14/hyperloglog-with-cascalog.html. We’ll look shortly in how you would utilize awesomeness of both Cascalog and HyperLogLog in order to execute Hadoop M/R tasks with amounts of data too big to have them in their original form.
