orenfromberg

// /////////////////////////////////////////////////////////////////////////////////
// JavaScript Magstripe (track 1, track2) data parser object
//
// Mar-22-2005	Modified by Wayne Walrath,
//				Acme Technologies http://www.acmetech.com
//			based on demo source code from www.skipjack.com
//
// USAGE:
// var p = new SwipeParserObj();
// p.dump();  -- returns parsed field values and meta info.

orenfromberg

Keybase proof

I hereby claim:

• I am orenfromberg on github.
• I am orenfromberg (https://keybase.io/orenfromberg) on keybase.
• I have a public key whose fingerprint is EA37 35BE 6C5D A419 DB2E 0F0D 32F5 46E6 D9B6 D611

To claim this, I am signing this object:

orenfromberg

const bin = (number) => {
	let answer = '';
	for (let i = 0; i < 64; i++) {
		answer = `${number & (2 ** i)? 1 : 0}${answer}`;
	}
	return answer.replace(/^0+/g, '');
}

console.log(bin(14))
console.log(bin(15))

orenfromberg

const bin = (number) => Array(64).fill(1).map((val,i) => (2 ** (64 - i - 1)) & number ? 1 : 0).join('').replace(/^0+/g,'')

console.log(bin(14))
console.log(bin(15))
console.log(bin(52359823756))

orenfromberg

def bin(num)
  num === 1 ? "1" : num === 0 ? "0" : "#{bin(num/2)}#{bin(num%2)}"
end

(1..64).each { |x| puts bin(x) }

orenfromberg

#!/usr/bin/env bash

set -uo pipefail
set +x 

FINGERPRINT="C874 011F 0AB4 0511 0D02 1055 3436 5D94 72D7 468F"

die() {
  echo "FATAL: $1"
  exit 1