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March 12, 2014 14:58
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#!/usr/bin/env ruby | |
# --------------------------------------------------------------------------------- | |
# Ruby Fun Times | |
# © #iMPULSE2013 | |
# | |
# Given a 20x20 matrix representing a map or coordinates, plot 5000 points | |
# containing random values between 1-10. Implement a merge sort on the uniq values | |
# and split list into 5 groups, with each group representing a color for the | |
# heatmap coord. Finally, render the colorized heatmap to stdout. | |
# --------------------------------------------------------------------------------- | |
class String | |
COLORS = { :blue => 34, | |
:cyan => 36, | |
:green => 32, | |
:yellow => 33, | |
:red => 31 } | |
def colorize(color) | |
"\033[#{COLORS[color]}m#{self}\033[0m" | |
end | |
end | |
matrix = [ [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0], | |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0], | |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0], | |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0], | |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0], | |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0], | |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0], | |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0], | |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0], | |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0], | |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0], | |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0], | |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0], | |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0], | |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0], | |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0], | |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0], | |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0], | |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0], | |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0] ] | |
plots = (0..5000).map {|i| [rand(0..19), rand(0..19), rand(0..10)]} | |
# Plot points on map | |
# --------------------------------------------------------------------------------- | |
plots.each do |plot| | |
matrix[plot[0]][plot[1]] += plot[2] | |
end | |
# Implement a merge sort then sort our plots from the matrix | |
# --------------------------------------------------------------------------------- | |
def merge_sort(list) | |
return list unless list.count > 1 | |
merge = -> (l, r) { | |
sorted = [] ; until l.empty? || r.empty? | |
sorted << (l[0] <= r[0] ? l.shift : r.shift) | |
end | |
sorted.concat(l).concat(r) | |
} | |
midpoint = list.count / 2 | |
left, right = list[0, midpoint], list[midpoint, (list.count - midpoint)] | |
merge.call(merge_sort(left), merge_sort(right)) | |
end | |
# Sort plots than partition into 5 groups for 5 colors | |
# --------------------------------------------------------------------------------- | |
map_vals = merge_sort(matrix.flatten.uniq) | |
map_vals = map_vals.each_slice((map_vals.count / 5.0).ceil).to_a | |
# Draw our map with pretty colors | |
# --------------------------------------------------------------------------------- | |
def render_map(map, uniq_vals) | |
colors = { 0 => :blue, | |
1 => :cyan, | |
2 => :green, | |
3 => :yellow, | |
4 => :red } | |
plot_char = '▒▒' | |
map.each do |m| | |
row = m.map do |point| | |
color = uniq_vals.index {|i| i.include?(point)} | |
plot_char.colorize(colors[color]) | |
end | |
puts row.join | |
end | |
end | |
render_map(matrix, map_vals) |
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