Linked Questions

173 votes
495 answers
35k views

Implement a Truth-Machine

A truth-machine (credits goes to this guy for coming up with it) is a very simple program designed to demonstrate the I/O and control flow of a language. Here's what a truth-machine does: Gets a ...
a spaghetto's user avatar
  • 11.2k
196 votes
416 answers
77k views

1, 2, Fizz, 4, Buzz

Introduction In our recent effort to collect catalogues of shortest solutions for standard programming exercises, here is PPCG's first ever vanilla FizzBuzz challenge. If you wish to see other ...
Beta Decay's user avatar
  • 23.4k
112 votes
330 answers
22k views

Simple cat program

One of the most common standard tasks (especially when showcasing esoteric programming languages) is to implement a "cat program": read all of STDIN and print it to STDOUT. While this is named after ...
Martin Ender's user avatar
167 votes
66 answers
40k views

Tips for golfing in C

What general tips do you have for golfing in C? I'm looking for ideas that can be applied to code golf problems in general that are at least somewhat specific to C (e.g. "remove comments" is not an ...
Casey's user avatar
  • 3,609
70 votes
170 answers
16k views

Print 0 to 100 without 1-9 characters

Print integers 0 to 100 (inclusive) without using characters 123456789 in your code. Separator of numbers can be comma or white space (by default <blank>, <...
user avatar
89 votes
98 answers
20k views

When does (x == x+2)? [closed]

The challenge: Define x in such a way that the expression (x == x+2) would evaluate to true. I tagged the question with C, but ...
77 votes
119 answers
9k views

Make an alphabet searchlight!

Inspired by a bug in a solution to this challenge, your challenge is to produce this exact text: ...
MD XF's user avatar
  • 13.9k
75 votes
91 answers
17k views

Build me a brick wall!

Challenge I need help building a brick wall! Throw together some code for me using no input and produce the following output wall shown below: ...
Dylan's user avatar
  • 935
103 votes
44 answers
13k views

Tips for golfing in <all languages>

The aim of this post is to gather all the golfing tips that can be easily applied to <all languages> rather than a specific one. Only post answers that its ...
ajax333221's user avatar
  • 3,644
62 votes
91 answers
13k views

Implement Minceraft

Introduction The game Minecraft has a 1 in 10000 chance of showing "Minceraft" instead of "Minecraft" on the title screen. Your challenge Your challenge is to code a function or ...
emanresu A's user avatar
  • 38.8k
109 votes
43 answers
18k views

Tips for Golfing in ECMAScript 6 and above

This is similar to other "Tips for golfing in <...>" but specifically targeting the newer features in JavaScript brought up in ECMAScript 6 and above. JavaScript inherently is a very verbose ...
Optimizer's user avatar
  • 26.5k
101 votes
51 answers
8k views

2048-like array shift

Assume we want to shift an array like it is done in the 2048 game: if we have two equal consecutive elements in array, merge them into twice the value element. Shift must return a new array, where ...
greenwolf's user avatar
  • 1,051
53 votes
75 answers
18k views

Helloellolloloo Worldorldrldldd

Make a program that takes the word you input, and adds that word to the back of itself minus its first letter, then repeats until all letters are gone. For example, ...
qazwsx's user avatar
  • 1,184
46 votes
84 answers
9k views

Binary to decimal converter

Binary to decimal converter As far as I can see, we don't have a simple binary to decimal conversion challenge. Write a program or function that takes a positive binary integer and outputs its ...
Stewie Griffin's user avatar
58 votes
59 answers
6k views

Count without 3

Background When I was in elementary school, we used to play a game in math class that goes as follows. All kids sit in a big circle and take turns counting, starting from 1. However, the following ...
Dennis's user avatar
  • 210k

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