cool native ruby methods to use

some_useful_methods.rb

# using bsearch wherenever possible :)

require 'benchmark'

data = (0..50_000_000)

Benchmark.bm do |x|
  x.report(:find) { data.find {|number| number > 40_000_000 } }
  x.report(:bsearch) { data.bsearch {|number| number > 40_000_000 } }
end

         user       system     total       real
find     3.020000   0.010000   3.030000   (3.028417)
bsearch  0.000000   0.000000   0.000000   (0.000006)

# creating an Array with a block

@board ||= Array.new(8) { Array.new(8) { '0' } }

# <=>
# To illustrate how it works, let's look at how it behaves for Fixnums. 
# If you call 5<=>5, it returns 0. 
# If you call 4<=>5, it returns -1. 
# If you call 5<=>4, it returns 1. 
# Basically, if the two numbers are the same, it returns 0, otherwise it returns -1 for least to greatest sorting, and 1 for reverse sorting.