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add leapYears
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‎README.md

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## planned exercises (in no particular order for the moment):
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1. book titles
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1. leap years
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1. book titles (MC)
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1. leap years
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1. Caesar Cipher
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1. Palindromes
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1. Pangrams
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1. pig latin
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1. pig latin (MC)
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1. fibonacci
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1. convert to snake case

‎leapYears/README.md

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# Exercise XX - leapYears
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Create a function that determines whether or not a given year is a leap year. Leap years are determined by the following rules:
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>There is a leap year every year whose number is perfectly divisible by four - except for years which are both divisible by 100 and not divisible by 400. The second part of the rule effects century years. For example; the century years 1600 and 2000 are leap years, but the century years 1700, 1800, and 1900 are not.
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```javascript
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leapYears(2000) // is a leap year: returns true
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leapYears(1985) // is not a leap year: returns false
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```
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‎leapYears/leapYears.js

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var leapYears = function() {
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}
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module.exports = leapYears

‎leapYears/leapYears.spec.js

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var leapYears = require('./leapYears')
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describe('leapYears', function() {
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it('works with non century years', function() {
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expect(leapYears(1994)).toEqual(true);
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});
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xit('works with non century years', function() {
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expect(leapYears(1997)).toEqual(false);
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});
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xit('works with ridiculously futuristic non century years', function() {
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expect(leapYears(34992)).toEqual(true);
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});
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xit('works with century years', function() {
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expect(leapYears(1900)).toEqual(false);
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});
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xit('works with century years', function() {
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expect(leapYears(1400)).toEqual(true);
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});
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xit('works with century years', function() {
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expect(leapYears(700)).toEqual(false);
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});
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});

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