2.4 KiB
2.4 KiB
id | title | challengeType |
---|---|---|
5a23c84252665b21eecc803f | Sum digits of an integer | 5 |
Description
- 110 sums to 1
- 123410 sums to 10
- fe16 sums to 29
- f0e16 sums to 29
Instructions
Tests
tests:
- text: <code>sumDigits</code> should be a function.
testString: assert(typeof sumDigits == 'function', '<code>sumDigits</code> should be a function.');
- text: <code>sumDigits("1")</code> should return a number.
testString: assert(typeof sumDigits("1") == 'number', '<code>sumDigits("1")</code> should return a number.');
- text: <code>sumDigits("1")</code> should return <code>1</code>.
testString: assert.equal(sumDigits("1"), 1, '<code>sumDigits("1")</code> should return <code>1</code>.');
- text: <code>sumDigits("12345")</code> should return <code>15</code>.
testString: assert.equal(sumDigits("12345"), 15, '<code>sumDigits("12345")</code> should return <code>15</code>.');
- text: <code>sumDigits("254")</code> should return <code>11</code>.
testString: assert.equal(sumDigits("254"), 11, '<code>sumDigits("254")</code> should return <code>11</code>.');
- text: <code>sumDigits("fe")</code> should return <code>29</code>.
testString: assert.equal(sumDigits("fe"), 29, '<code>sumDigits("fe")</code> should return <code>29</code>.');
- text: <code>sumDigits("f0e")</code> should return <code>29</code>.
testString: assert.equal(sumDigits("f0e"), 29, '<code>sumDigits("f0e")</code> should return <code>29</code>.');
- text: <code>sumDigits("999ABCXYZ")</code> should return <code>162</code>.
testString: assert.equal(sumDigits("999ABCXYZ"), 162, '<code>sumDigits("999ABCXYZ")</code> should return <code>162</code>.');
Challenge Seed
function sumDigits(n) {
// Good luck!
}
Solution
function sumDigits(n) {
n += ''
for (var s=0, i=0, e=n.length; i<e; i+=1) s+=parseInt(n.charAt(i),36)
return s
}