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Documenting things

Brandon Weaver baweaver

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Documenting things
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baweaver / primeperms.rb
Last active August 29, 2015 14:00
# Patch numbers to have a prime? method
class Fixnum
def prime?
([1,2].include?(self) || !(2..Math.sqrt(self).ceil).find { |x| self % x == 0 })
end
end
# Basic implementation - 42 minutes
(1..1_000_000).select { |n|
n.to_s
@baweaver
baweaver / gist:11240360
Last active August 29, 2015 14:00
java vs scala - which is easier to read?
// Compute Fibonacci numbers, ex: 1 1 2 3 5 8 13 21...
// A fib number is the result of adding the previous two,
// such that fib(3) is the result of fib(2) + fib(1)
// Scala
def fib(i:Int):Int = i match{
case 0 => 0
case 1 => 1
case _ => fib(i-1) + fib(i-2)
}
@baweaver
baweaver / unleashing_pry.md
Last active January 11, 2016 19:29
showterm.io links for unleashing pry
@baweaver
baweaver / tools.md
Last active August 29, 2015 14:02
Tools mentioned in Unleashing Pry
@baweaver
baweaver / factor_conditionals.rb
Created June 26, 2014 04:01
Only mildly confounded, and the difference is only truly pronounced at larger orders. Given a complicated enough conditional in a block though and this could have a serious effect.
[24] pry(main)> def test(range, gt=nil)
[24] pry(main)* range.select { |n| gt ? n > gt : n }.reduce(:+)
[24] pry(main)* end
=> nil
[25] pry(main)> def test2(range, gt=nil)
[25] pry(main)* filter = gt ? -> n { n > gt } : -> n { n }
[25] pry(main)* range.select(&filter).reduce(:+)
@baweaver
baweaver / prime_perms2.rb
Last active August 29, 2015 14:03
Variant of Prime Perms, checking mersennes from 1 to 1 million, using block extraction for time comparisons. Surprising results were found when t3 dominated the field.
# From original: https://gist.github.com/baweaver/11163861
# Using Pipeable for clearer code: https://github.com/baweaver/pipeable
# and Benchpress to measure: https://github.com/baweaver/benchpress
# Make Object Pipeable
class Object; include Pipeable end
# Patch numbers to have a prime? method
class Fixnum
def prime?
@baweaver
baweaver / static_typed.rb
Last active August 29, 2015 14:04
Ala banisterfiend's cleverness: https://gist.github.com/banister/acec9b4688cbb7575106 - I made it do something else interesting
def static_typed(types={})
type, method_name = types.first
old_method = instance_method(method_name)
define_method(method_name) do |*args, &block|
old_method.bind(self).call(*args, &block).tap { |return_value|
raise TypeError, "Return value is not of type #{type}!" unless type === return_value
}
end
end
@baweaver
baweaver / gist:f65117ba71667298afac
Created August 13, 2014 03:26
Person.where(
{}.tap { |filters|
filters[:name] = params[:name] if params[:name]
filters[:age] = params[:age] if params[:age]
filters[:gender] = params[:gender] if params[:gender]
}
)
@baweaver
baweaver / html_flip_flop.rb
Last active September 3, 2015 21:18
Abusing flip flops for HTML parsing after watching a ruby tapa ala Avdi.
IO.readlines('test.html')
.flat_map(&:split)
.select { |word|
true if word =~ %r{<strong>} .. word =~ %r{</strong>}
}
# => ["<strong>multiple</strong>","<strong>strong</strong>"]
# test.html
#
@baweaver
baweaver / turtle_miner.lua
Last active August 29, 2015 14:06
--[[
# Digger: A simple program to dig a 1 x 2 shaft straight
## Author: Brandon Weaver (keystonelemur / baweaver)
--]]
local tArgs = { ... }
if tArgs[1] == 'help' then
print('Usage:')
print('')