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John Dvorak's user avatar
John Dvorak's user avatar
John Dvorak's user avatar
John Dvorak
  • Member for 11 years, 3 months
  • Last seen more than a month ago
61 votes

Make a scalable Christmas Tree

31 votes

Determine if all decimal digits are unique

29 votes
Accepted

Write a Quine in Plain English

27 votes

Write a square program that outputs the number of times it has been "unrolled"

27 votes
Accepted

Sudoku Compression

27 votes

Javascript: Create a 10x10 array of 1s

27 votes

Build a multiplying machine using NAND logic gates

22 votes

Print every character your program doesn't have

19 votes

4, 8, 15, 16, 23, 42

18 votes
Accepted

Generate an aperiodic integer sequence

18 votes

How to write a C program for multiplication without using the * and + operators?

17 votes
Accepted

Open source optical lattice clock

16 votes

What's the file extension?

14 votes
Accepted

Identity sequences on the Rubik's Cube

14 votes
Accepted

Build interpreter for non-existent language

13 votes

Shortest code to determine if a string is a palindrome

13 votes

building circuit for divisibility by 3

13 votes

Find the smallest prime from a substring

12 votes

Convert short month names to their longer counterparts [Ended]

12 votes

Length of String Using Set Theory

11 votes

Mandoline quine

11 votes
Accepted

Speak digits from 0 to 9 aloud

11 votes

Recreation of Piet Mondrian Composition

10 votes

Alien Name Generator

9 votes

Output: Calendar Month (without native calendar generating functions)

8 votes

Make a JavaScript/jQuery slideshow

8 votes

How do I find the factorial of a positive number?

8 votes
Accepted

Build an adding machine using NAND logic gates

8 votes

Shortest code to determine if a string is a palindrome

8 votes

Create an array with repeated numbers