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Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>
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Alex A. Naanou 2018-09-05 00:27:45 +03:00
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@ -25,6 +25,7 @@
- [Number patterns](#number-patterns) - [Number patterns](#number-patterns)
- [Array patterns](#array-patterns) - [Array patterns](#array-patterns)
- [Pattern variables](#pattern-variables) - [Pattern variables](#pattern-variables)
- [Miscellaneous patterns](#miscellaneous-patterns)
- [Patterns (EXPERIMENTAL)](#patterns-experimental) - [Patterns (EXPERIMENTAL)](#patterns-experimental)
- [JSON compatibility](#json-compatibility) - [JSON compatibility](#json-compatibility)
- [Extending Diff](#extending-diff) - [Extending Diff](#extending-diff)
@ -497,6 +498,19 @@ var o = {}
cmp(P, [o, o, {}]) // -> true cmp(P, [o, o, {}]) // -> true
``` ```
### Miscellaneous patterns
`TEST(function)`
Matches if `function` returns true.
The `function` has the same signature as Pattern's `.__cmp__(obj, cmp, context)` and is run in the context of the `TEST` instance.
Example:
```javascript
var P = [ANY, ANY, TEST(e => !console.log('ELEM #3:', e))]
cmp(P, [1,2,3]) // prints: 'ELEM #3: 3'
```
## Patterns (EXPERIMENTAL) ## Patterns (EXPERIMENTAL)