Linked Questions

123 votes
419 answers
31k views

Print a 10 by 10 grid of asterisks

Background This is a standard textbook example to demonstrate for loops. This is one of the first programs I learnt when I started learning programming ~10 years ago. Task You are to print this exact ...
Leaky Nun's user avatar
  • 50.1k
103 votes
45 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
  • 3,654
76 votes
61 answers
16k views

Hare Krishna Hare Krishna Krishna Krishna Hare Hare

Recently, I've seen Hare Krishna people with their mantra on the emblem and I've found it may be quite interesting to code golf. The challenge Write the Hare Krishna mantra, i.e.: ...
Dariusz Woźniak's user avatar
58 votes
89 answers
8k views

Pointers, pointers, pointers!

Introduction In the error outputs of some languages such as Java, a pointer is shown to give the programmer an idea of exactly where the error went wrong. Take this example on Ideone: ...
Matt Y's user avatar
  • 651
108 votes
40 answers
12k views

A simple TCP server

Write a program or function that listens for incoming TCP traffic on port N. It offers a simple service: it calculates sum of IP address fields of incoming connection and returns. Program or function ...
Hannes Karppila's user avatar
75 votes
57 answers
11k views

My daughter's alphabet

The other day we were writing sentences with my daughter with a fridge magnet letter. While we were able to make some(I love cat), we didn't have enough letters to ...
romaninsh's user avatar
  • 1,003
52 votes
57 answers
10k views

The Curious Case of Steve Ballmer

Steve Ballmer is the ex-CEO of Microsoft, and in a recent article, claimed that he "still does not know what he did wrong with mobile". As CodeProject's newsletter pointed out, "That article's title ...
Mayube's user avatar
  • 11.7k
36 votes
66 answers
5k views

Insist on an answer

At runtime, keep prompting for a line of input until the user inputs something (other than an empty newline), i.e. does not just press Enter or OK. Output or result is neither required nor prohibited. ...
Adám's user avatar
  • 31.1k
44 votes
56 answers
8k views

Don't give me five!

Question : You will be given the starting and ending integers of a sequence and should return the number of integers within it which do not contain the digit 5. The ...
Arasuvel's user avatar
  • 461
53 votes
48 answers
22k views

AlTeRnAtE tHe CaSe

For today's challenge, you must write a program or function that alternates the case of a string. However, you must ignore non-alphabetic characters. This means that every alphabetic character must ...
DJMcMayhem's user avatar
  • 59.6k
68 votes
27 answers
15k views

xkcd-Style Page Numbering

Randall Munroe's book "xkcd, volume 0" uses a rather odd number system for the page numbers. The first few page numbers are ...
Martin Ender's user avatar
28 votes
61 answers
4k views

Erverse Hte Ifrst Wto Eltters fo Aech Owrd

Inspired by this accidental misspelling If you could read the title, then you already know what the challenge is about. If not, then I'll tell you. Easy: simply take each word (single space delimited)...
Seggan's user avatar
  • 6,642
42 votes
33 answers
12k views

Java is to JavaScript as Car is to Carpet

Title stolen inspired by Greg Hewgill's answer to What's the difference between JavaScript and Java? Introduction Java and JavaScript are commonly used languages among programmers, and are currently ...
Stevoisiak's user avatar
45 votes
34 answers
5k views

Reverse the consonants

The program should take a string as input and reverse the consonants in it, while keeping the order of vowels. All the letters will be lowercase, so you don't have to worry about casing. Examples ...
nicael's user avatar
  • 4,811
30 votes
43 answers
3k views

Implement "tac": Print lines from a file in reverse

Between the kitten question and seeing this question at U&L about some sed magic, how about implementing tac? Objective ...
Nick T's user avatar
  • 3,297

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