My FBI Agent Watching My Eternal CSS Struggles

Content What users see via frontend What dev see via backend Frontend Backend

Content FRONTEND BACKEND

Content object Object Coca'Cola ORIGINAL TASTE

Content CLIENT: "What is going on with my website? It looks all wrong!" ME: "It was working just fine yesterday, let's take a look." Us: "Let's take a look... (We download a page, check out the code). Well, it looks as if someone's gone in and deleted some of the code that makes the site work." CLIENT: "Yeah, that was me, I was getting rid of some of your unnecessary code... why isn't the site working?"

Content El AceLewis my first calculator py Watch Star 612 Fork 80 Code Issues 25 M Pull requests 2 I Projects 0 Bd Wiki D Security li. Insights myfirstcalculator.py D 13 commits is 1 branch 0 releases 11 4 contributors Branch: mas PLAY New pull request Create new file Upload files Find file Clone or download y AceLewis Merge branch 'master' of https:github.comAceLewismyfirstcalcula.. Latest commit a7aabea on Mav 16. 2016 B gitattributes Added gitattributes gitignore files 4 years ago B gitignore Added gitattributes gitignore files 4 years ago B README.md E generator.py myfirst calculator.py B my first calculator 0 to1000. 20823 lines (20818 sloc) 753 Recommended from future import division 4 years ago -ES You're using jump to definition to myfirstcalculator.py by Acelewis TODO: Make it work for all floating point numbers too if 32 1: Because Python 2 does not know maths input raw input Python 2 compatibility print ('Welcome to this calculator!") print('It can add, subtract, multiply and divide whole numbers from num1 - int (input ('Please choose your first number: )) sign input ('What do you want to do? , -, , or num2 int (input ('Please choose your second number: if numl 0 and sign print("00 0") if num 0 and sign print ("01 1") if num 0 and sign print ("02 2") if num so and sien print("03 3") and num and num2 and num print ("5042 2100") if num1 50 and sign He 20806 print ("5043 2150") 20807 if num as 50 and sign 20808 print ("5044 2200") 20809 if num1 as 50 and sign as 45: 20810 print ("5045 2250) 20811 if numl 50 and sign and mm 46: 20812 print ("5046 2300") 20813 if num 50 and sign a and numbe print ("5047 2350") 20815 20816 20817 20818 20819 20820 20821 20822 if num 50 and sign s and num2 48 print ("5048 2400") if num 50 and Sign sand num print ("5049 2450") if num 50 and sign and num2 print ("5050 2500") print ("Thanks for using this calculator, goodbye :)")

The real street magic here is using Unicode character references as object keys to confuse even "super senior JS developers." That code is pure evil - using those weird \u escape sequences to access object properties, then doing some arithmetic with them. The magician knew exactly what he was doing. Nothing makes frontend devs question their life choices faster than JavaScript's object property access quirks combined with Unicode escape sequences. And they fell right into his trap, going from "we can solve any expression" to "OMG" in 0.2 seconds flat. Classic JavaScript humiliation in the wild.