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- # `unless()`
-
- The unless method will execute the given callback when the first argument given to the method evaluates to false:
-
- ```js
- const collection = collect([1, 2, 3]);
-
- collection.unless(false, items => items.push(4));
-
- collection.all();
-
- // [1, 2, 3, 4]
- ```
-
- [View source on GitHub](https://github.com/ecrmnn/collect.js/blob/master/src/methods/unless.js)
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