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doc: explain native external types #31214

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doc: explain native external types #31214

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doc: explain native external types
HarshithaKP Jan 6, 2020
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fixup: address review comment
HarshithaKP Jan 7, 2020
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fixup: address review comments
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HarshithaKP Jan 8, 2020
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6 changes: 5 additions & 1 deletion doc/api/util.md
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Expand Up @@ -1391,7 +1391,11 @@ added: v10.0.0
* `value` {any}
* Returns: {boolean}

Returns `true` if the value is a native `External` value.
A native `External` value is a special type of object whose
data is (a) not stored within the JavaScript managed heap
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and (b) does not conform to standard JavaScript types. Such
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objects are created either by Node.js internals or native
addons and are wrapped by a JavaScript object.

### `util.types.isFloat32Array(value)`
<!-- YAML
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