Check if a number is equal to 13.
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Security vulernabilities apparently

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Latest commit 27ad8c0 Jul 24, 2018

Special thanks to @casdr for the logo


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An npm package to check if a number is equal to 13.


npm --save i is-thirteen


var isThirteen = require('is-thirteen');

// PLEAS READ THE SOURCE CODE BECAuse we moved fast and broke things

i̶s̶T̶h̶i̶r̶t̶e̶e̶n̶(̶2̶5̶)̶;̶ ̶/̶/̶ ̶f̶a̶l̶s̶e̶
i̶s̶T̶h̶i̶r̶t̶e̶e̶n̶(̶1̶3̶)̶;̶ ̶/̶/̶ ̶t̶r̶u̶e̶
var is = require('is-thirteen');
// Now with elegant syntax.

is(13).thirteen(); // true
is(12.8).roughly.thirteen(); // true
is(6).within(10).of.thirteen(); // true
is(2003).yearOfBirth(); // true

// check your math skillz
is(4).plus(5).thirteen();      // false
is(12).plus(1).thirteen();    // true
is(4).minus(12).thirteen();    // false
is(14).minus(1).thirteen();    // true
is(1).times(8).thirteen();    // false
is(26).divideby(2).thirteen();  //true


npm test



A helpful tool by Jezen Thomas with helpful help from Gytis Daujotas and many fine folk.