---
id: 596fd036dc1ab896c5db98b1
title: Convert seconds to compound duration
challengeType: 5
forumTopicId: 302236
dashedName: convert-seconds-to-compound-duration
---
# --description--
Implement a function which:
- takes a positive integer representing a duration in seconds as input (e.g.,
100
), and
- returns a string which shows the same duration decomposed into weeks, days, hours, minutes, and seconds as detailed below (e.g.,
1 min, 40 sec
).
Demonstrate that it passes the following three test-cases:
Test Cases
| Input number | Output number |
| ------------ | ------------------------- |
| 7259 | 2 hr, 59 sec
|
| 86400 | 1 d
|
| 6000000 | 9 wk, 6 d, 10 hr, 40 min
|
Details
-
The following five units should be used:
| Unit | Suffix used in Output | Conversion |
| ------ | --------------------- | --------------------- |
| week |!!crwdBlockTags_18_sgaTkcolBdwrc!! | 1 week = 7 days |
| day |!!crwdBlockTags_19_sgaTkcolBdwrc!! | 1 day = 24 hours |
| hour |!!crwdBlockTags_20_sgaTkcolBdwrc!! | 1 hour = 60 minutes |
| minute |!!crwdBlockTags_21_sgaTkcolBdwrc!! | 1 minute = 60 seconds |
| second |!!crwdBlockTags_22_sgaTkcolBdwrc!! | --- |
-
However, only include quantities with non-zero values in the output (e.g., return
1 d
and not 0 wk, 1 d, 0 hr, 0 min, 0 sec
).
-
Give larger units precedence over smaller ones as much as possible (e.g., return
2 min, 10 sec
and not 1 min, 70 sec
or 130 sec
).
-
Mimic the formatting shown in the test-cases (quantities sorted from largest unit to smallest and separated by comma+space; value and unit of each quantity separated by space).
# --hints--
`convertSeconds` should be a function.
```js
assert(typeof convertSeconds === 'function');
```
`convertSeconds(7259)` should return `2 hr, 59 sec`.
```js
assert.equal(convertSeconds(testCases[0]), results[0]);
```
`convertSeconds(86400)` should return `1 d`.
```js
assert.equal(convertSeconds(testCases[1]), results[1]);
```
`convertSeconds(6000000)` should return `9 wk, 6 d, 10 hr, 40 min`.
```js
assert.equal(convertSeconds(testCases[2]), results[2]);
```
# --seed--
## --after-user-code--
```js
const testCases = [7259, 86400, 6000000];
const results = ['2 hr, 59 sec', '1 d', '9 wk, 6 d, 10 hr, 40 min'];
```
## --seed-contents--
```js
function convertSeconds(sec) {
return true;
}
```
# --solutions--
```js
function convertSeconds(sec) {
const localNames = ['wk', 'd', 'hr', 'min', 'sec'];
// compoundDuration :: [String] -> Int -> String
const compoundDuration = (labels, intSeconds) =>
weekParts(intSeconds)
.map((v, i) => [v, labels[i]])
.reduce((a, x) =>
a.concat(x[0] ? [`${x[0]} ${x[1] || '?'}`] : []), []
)
.join(', ');
// weekParts :: Int -> [Int]
const weekParts = intSeconds => [0, 7, 24, 60, 60]
.reduceRight((a, x) => {
const r = a.rem;
const mod = x !== 0 ? r % x : r;
return {
rem: (r - mod) / (x || 1),
parts: [mod].concat(a.parts)
};
}, {
rem: intSeconds,
parts: []
})
.parts;
return compoundDuration(localNames, sec);
}
```