2.6 KiB
2.6 KiB
id | title | challengeType |
---|---|---|
5a23c84252665b21eecc7edc | Last Friday of each month | 5 |
Description
Write a function that returns the date of the last Friday of a given month for a given year.
Instructions
Tests
tests:
- text: <code>lastFriday</code> should be a function.
testString: assert(typeof lastFriday == 'function', '<code>lastFriday</code> should be a function.');
- text: <code>lastFriday(2018, 1)</code> should return a number.
testString: assert(typeof lastFriday(2018, 1) == 'number', '<code>lastFriday(2018, 1)</code> should return a number.');
- text: <code>lastFriday(2018, 1)</code> should return <code>26</code>.
testString: assert.equal(lastFriday(2018, 1), 26, '<code>lastFriday(2018, 1)</code> should return <code>26</code>.');
- text: <code>lastFriday(2017, 2)</code> should return <code>24</code>.
testString: assert.equal(lastFriday(2017, 2), 24, '<code>lastFriday(2017, 2)</code> should return <code>24</code>.');
- text: <code>lastFriday(2012, 3)</code> should return <code>30</code>.
testString: assert.equal(lastFriday(2012, 3), 30, '<code>lastFriday(2012, 3)</code> should return <code>30</code>.');
- text: <code>lastFriday(1900, 4)</code> should return <code>27</code>.
testString: assert.equal(lastFriday(1900, 4), 27, '<code>lastFriday(1900, 4)</code> should return <code>27</code>.');
- text: <code>lastFriday(2000, 5)</code> should return <code>26</code>.
testString: assert.equal(lastFriday(2000, 5), 26, '<code>lastFriday(2000, 5)</code> should return <code>26</code>.');
- text: <code>lastFriday(2006, 6)</code> should return <code>30</code>.
testString: assert.equal(lastFriday(2006, 6), 30, '<code>lastFriday(2006, 6)</code> should return <code>30</code>.');
- text: <code>lastFriday(2010, 7)</code> should return <code>30</code>.
testString: assert.equal(lastFriday(2010, 7), 30, '<code>lastFriday(2010, 7)</code> should return <code>30</code>.');
- text: <code>lastFriday(2005, 8)</code> should return <code>26</code>.
testString: assert.equal(lastFriday(2005, 8), 26, '<code>lastFriday(2005, 8)</code> should return <code>26</code>.');
Challenge Seed
function lastFriday(year, month) {
// Good luck!
}
Solution
function lastFriday (year, month) {
var i, last_day;
i = 0;
while (true) {
last_day = new Date(year, month, i);
if (last_day.getDay() === 5) {
return last_day.getDate();
}
i -= 1;
}
};