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Forked from 140bytes/LICENSE.txt
Created July 29, 2011 19:55
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140byt.es - Prime Number Tester

140byt.es

A tweet-sized, fork-to-play, community-curated collection of JavaScript.

How to play

  1. Click the Fork button above to fork this gist.
  2. Modify all the files to according to the rules below.
  3. Save your entry and tweet it up!

Keep in mind that thanks to the awesome sensibilities of the GitHub team, gists are just repos. So feel free to clone yours and work locally for a more comfortable environment, and to allow commit messages.

Rules

All entries must exist in an index.js file, whose contents are

  1. an assignable, valid Javascript expression that
  2. contains no more than 140 bytes, and
  3. does not leak to the global scope.

All entries must also be licensed under the WTFPL or equally permissive license.

For more information

See the 140byt.es site for a showcase of entries (built itself using 140-byte entries!), and follow @140bytes on Twitter.

To learn about byte-saving hacks for your own code, or to contribute what you've learned, head to the wiki.

140byt.es is brought to you by Jed Schmidt, with help from Alex Kloss. It was inspired by work from Thomas Fuchs and Dustin Diaz.

function(n,i) { // the number (n) and a placeholder (i)
for (i = 1; ++i < n;) { // loop over all numbers smaller then the initial one and greater as 1
if (!(n % i)) { // is the number a divisor?
return; // then it is not a prime
}
}
return 1; // We didn't seem to encounter any divisors, so it is a prime
}
function(n,i){for(i=1;++i<n;){if(!(n%i)){return;}}return 1;}
DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
Version 2, December 2004
Copyright (C) 2011 YOUR_NAME_HERE <YOUR_URL_HERE>
Everyone is permitted to copy and distribute verbatim or modified
copies of this license document, and changing it is allowed as long
as the name is changed.
DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0. You just DO WHAT THE FUCK YOU WANT TO.
{
"name": "primalTester",
"description": "This tests if a given number is a prime (not the fast algorithm)",
"keywords": [
"math",
"prime",
"simple"
]
}
<!DOCTYPE html>
<title>isPrime</title>
<div>Expected value: <b>yes</b></div>
<div>Actual value: <b id="ret"></b></div>
<script>
var isPrime = function(n,i){for(i=1;++i<n;){if(!(n%i)){return;}}return 1;}
document.getElementById( "ret" ).innerHTML = isPrime(1499) ? 'yes' : 'no';
</script>
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