if (extras) {
Object.assign(tok, {
Expression: require('./parsers/expr'),
// Literals
Array: require('./parsers/array'),
Dictionary: require('./literals/dict'),
FunctionalOperator: require('./literals/fop'),
FunctionalProperty: require('./literals/fprop'),
Number: require('./literals/number'),
String: require('./literals/string'),
Symbol: require('./literals/symbol'),
The social network code-golf
On my social network, two users are "friends" if their name share a common letter.
For exemple, bob and bill are friends, as they share the letter b.
Given a list of user names:
display a falsy value if there exist in the list two distinct users x and y that canno...
Best Above-and-Beyond Answer
This was originally featured in Best of 2015 by PhiNotPi.
Every once and a while, an answer takes the challenge to the extreme. This prize will be awarded to an answer which went far beyond the expectations of the challenge. This could include
a code golf...
Prime Spiral
primescode-golfgraphical-output
This challenge was inspired by this question on math.SE by @Karl
You might be familiar with the Ulam spiral. What we're doing here is similar, but a little bit different, given a positive integer N we generate an image:
On an empty equally spaced ...
This is a 3x3 ASCII jigsaw puzzle:
_____ _____ _____
| _| |_ |
| (_ _ _) |
|_ _|_( )_|_ _|
| (_) |_ _| (_) |
| _ _) (_ _ |
|_( )_|_ _|_( )_|
| _| (_) |_ |
| (_ _) |
|_____|_____|_____|
this is also a 3x3 ASCII jigsaw puzzle:
_____ _____ _____
...
Python 2, 43 bytes
f=lambda n,k=1:k/n or n*f(n,k+1)+k*f(n-1,k)
Try it online!
A different approach
Ever since I posted this challenge, I tried to come up with a recursive solution to this problem. While I failed using nothing more than pen and paper, I managed to turn the formula to golf i...
