32 lines
648 B
Markdown
32 lines
648 B
Markdown
# `containsOneItem()`
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The containsOneItem method returns true if the collection contains exactly one item; otherwise, false is returned:
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```js
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collect([1]).containsOneItem();
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// true
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collect({ firstname: 'Luis' }).containsOneItem();
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// true
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collect('value').containsOneItem();
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// true
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collect([1, 2, 3]).containsOneItem();
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// false
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collect({ firstname: 'Luis', lastname: 'Díaz' }).containsOneItem();
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// false
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collect().containsOneItem();
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// false
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collect([]).containsOneItem();
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// false
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collect({}).containsOneItem();
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// false
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```
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[View source on GitHub](https://github.com/ecrmnn/collect.js/blob/master/src/methods/containsOneItem.js)
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