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Jonas Elfström jonelf

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@jonelf
jonelf / gist:8147cdf385e8cd55ca02
Created August 18, 2014 12:13
My first and probably last program written in Brainf*ck.
++++++++++[>+++++++>++++++++++>++++>+<<<<-]>++.>+.+++++.>--------.<-----.>+++++++++++++.<++++++++.------------.+++++++++++++.>------------.>.
@jonelf
jonelf / asyncAwaitTest
Last active August 29, 2015 14:05
async await test
using System;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
namespace ConsoleApplication2
{
class Program
{
public static void Main(string[] args)
@jonelf
jonelf / gist:4a5d9415776e823b50ac
Created September 4, 2014 08:54
Histogram of characters used in Google Application Passwords
def histogram(message)
message.each_char.reduce(Hash.new(0)) { |h, k| h[k] += 1; h}
end
def graph_histogram(h)
h.to_a.
sort_by{|kv| kv[1]*-1}.
map{|a| "#{a[0]} |#{('+'*a[1])[0..120]}#{a[1].to_s}\n"}.
join
end
@jonelf
jonelf / gist:188343b2070354a00513
Created September 17, 2014 07:34
Validera personnummer i XPATH
(validate-dateTime("yyyyMMdd", left($pnum, 8 )))
and
(((number(substring($pnum,3,1))*2) mod 9 + (floor(number(substring($pnum,3,1)) div 9)*9) + (number(substring($pnum,4,1))) +
(number(substring($pnum,5,1))*2) mod 9 + (floor(number(substring($pnum,5,1)) div 9)*9) + (number(substring($pnum,6,1))) +
(number(substring($pnum,7,1))*2) mod 9 + (floor(number(substring($pnum,7,1)) div 9)*9) + (number(substring($pnum,8,1))) +
(number(substring($pnum,9,1))*2) mod 9 + (floor(number(substring($pnum,9,1)) div 9)*9) + (number(substring($pnum,10,1))) +
(number(substring($pnum,11,1))*2) mod 9 + (floor(number(substring($pnum,11,1)) div 9)*9) + (number(substring($pnum,12,1)))
) mod 10 = 0)
@jonelf
jonelf / gist:223638855633144d9799
Last active August 29, 2015 14:10
Range cover example
require 'nokogiri'
xml = %{
<Employments>
<Employment>
<From>2013-01-01</From>
<To>1900-01-01</To>
<MainEmployment>0</MainEmployment>
</Employment>
<Employment>
<From>2014-11-01</From>
@jonelf
jonelf / diamond
Last active August 29, 2015 14:10
Diamond
first, last = "A".ord, "D".ord;
rows = (first...last).to_a + last.downto(first).to_a
cols = last.downto(first).to_a + (first + 1..last).to_a
rows.each do |row|
line = cols.map do |col|
col == row ? col.chr : "-"
end
puts line.join
@jonelf
jonelf / gist:965eed2ca03257c04335
Created January 2, 2015 01:24
Lorenz Attractor in Swift
// Swift Playground example of the Lorenz Attractor
// Change platform to OS X when opening Playground.
// alt + cmd + enter to show Assistant editor and see resulting image.
import Cocoa
import XCPlayground
let width = 600.0, height = 500.0
class CustomView: NSView {
@jonelf
jonelf / luhnTest
Last active July 2, 2019 10:23
Luhn test in Swift.
func lunhCheck(number : String) -> Bool
{
let reversed = reverse(number).map { String($0).toInt()! }
return reduce(enumerate(reversed), 0, {(sum, val) in
let odd = val.index % 2 == 1
return sum + (odd ? (val.element == 9 ? 9 : (val.element * 2) % 9) : val.element)
}) % 10 == 0
}
lunhCheck("49927398716")
@jonelf
jonelf / standard_deviation.swift
Last active February 15, 2024 21:45
Standard Deviation in Swift
func standardDeviation(arr : [Double]) -> Double
{
let length = Double(arr.count)
let avg = arr.reduce(0, {$0 + $1}) / length
let sumOfSquaredAvgDiff = arr.map { pow($0 - avg, 2.0)}.reduce(0, {$0 + $1})
return sqrt(sumOfSquaredAvgDiff / length)
}
let responseTimes = [ 18.0, 21.0, 41.0, 42.0, 48.0, 50.0, 55.0, 90.0 ]
@jonelf
jonelf / keybase.md
Created January 19, 2015 23:01

Keybase proof

I hereby claim:

  • I am jonelf on github.
  • I am jonelf (https://keybase.io/jonelf) on keybase.
  • I have a public key whose fingerprint is 6757 22B3 8909 BCA0 8CF3 2EEB D21C 666E 09FD 0C8B

To claim this, I am signing this object: