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Change sortComparePriority contract #319

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3 changes: 3 additions & 0 deletions CHANGELOG.md
Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,9 @@ and this project adheres to
- `MemoryWritable` internal buffer size is now limited to 8 MB by default.
- Signature of `callerFilepath()` to allow passing `RegExp` as depth to be used
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for filtering of stack frames.
- Contract of `sortComparePriority()` to only accept a priority array, which
was the first argument before the change, and return a comparison function
accepting the other two arguments.

### Fixed

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13 changes: 8 additions & 5 deletions README.md
Original file line number Diff line number Diff line change
Expand Up @@ -185,7 +185,7 @@ $ npm install @metarhia/common
- [Pool.prototype.constructor](#poolprototypeconstructorfactory--null)
- [Pool.prototype.get](#poolprototypeget)
- [Pool.prototype.put](#poolprototypeputvalue)
- [sortComparePriority](#sortcompareprioritypriority-s1-s2)
- [sortComparePriority](#sortcompareprioritypriority)
- [sortCompareDirectories](#sortcomparedirectoriesa-b)
- [sortCompareByName](#sortcomparebynamea-b)
- [MemoryWritable](#class-memorywritable-extends-writable)
Expand Down Expand Up @@ -1247,20 +1247,23 @@ Mixin for ES6 classes without overriding existing methods

#### Pool.prototype.put(value)

### sortComparePriority(priority, s1, s2)
### sortComparePriority(priority)

- `priority`: [`<string[]>`][string] with priority

_Returns:_ [`<Function>`][function] comparison function that can be passed to
`Array#sort()`

- `s1`: [`<string>`][string] to compare
- `s2`: [`<string>`][string] to compare

_Returns:_ [`<number>`][number]
- _Returns:_ [`<number>`][number]

Compare for array.sort with priority

_Example:_

```js
files.sort(common.sortComparePriority);
files.sort(common.sortComparePriority(priority));
```

### sortCompareDirectories(a, b)
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8 changes: 5 additions & 3 deletions lib/sort.js
Original file line number Diff line number Diff line change
Expand Up @@ -2,12 +2,14 @@

// Compare for array.sort with priority
// priority - <string[]>, with priority
// Returns: <Function>, comparison function that can be passed to
// `Array#sort()`
// s1 - <string>, to compare
// s2 - <string>, to compare
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// Returns: <number>
// Returns: <number>
//
// Example: files.sort(common.sortComparePriority)
const sortComparePriority = (priority, s1, s2) => {
// Example: files.sort(common.sortComparePriority(priority))
const sortComparePriority = priority => (s1, s2) => {
let a = priority.indexOf(s1);
let b = priority.indexOf(s2);
if (a === -1) a = Infinity;
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22 changes: 12 additions & 10 deletions test/sort.js
Original file line number Diff line number Diff line change
Expand Up @@ -21,19 +21,21 @@ const CONFIG_FILES_PRIORITY = [
'routes.js',
];

const compareFunction = common.sortComparePriority(CONFIG_FILES_PRIORITY);
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Nit: I'd just inline the CONFIG_FILES_PRIORITY at this point.


metatests.case(
'Common / sort',
{ common },
{ common, sortComparePriority: compareFunction },
{
'common.sortComparePriority': [
[CONFIG_FILES_PRIORITY, 'files.js', 'sandbox.js', 1],
[CONFIG_FILES_PRIORITY, 'filestorage.js', 'routes.js', -1],
[CONFIG_FILES_PRIORITY, 'unknown.js', 'sandbox.js', 1],
[CONFIG_FILES_PRIORITY, 'log.js', 'sandbox.js', 1],
[CONFIG_FILES_PRIORITY, 'sandbox.js', 'sandbox.js', 0],
[CONFIG_FILES_PRIORITY, 'log.js', 'log.js', 0],
[CONFIG_FILES_PRIORITY, 'tasks.js', 'application.js', -1],
[CONFIG_FILES_PRIORITY, 'tasks.js', 'missing_file', -1],
sortComparePriority: [
['files.js', 'sandbox.js', 1],
['filestorage.js', 'routes.js', -1],
['unknown.js', 'sandbox.js', 1],
['log.js', 'sandbox.js', 1],
['sandbox.js', 'sandbox.js', 0],
['log.js', 'log.js', 0],
['tasks.js', 'application.js', -1],
['tasks.js', 'missing_file', -1],
],
'common.sortCompareDirectories': [
[{ name: '/abc' }, { name: 'abc.ext' }, -1],
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