time-to-botec/js/node_modules/@stdlib/utils/pick/README.md

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@license Apache-2.0
Copyright (c) 2018 The Stdlib Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
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# pick
> Return a partial object copy containing only specified keys.
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<section class="usage">
## Usage
```javascript
var pick = require( '@stdlib/utils/pick' );
```
#### pick( obj, keys )
Returns a partial copy of an `object`. The returned `object` contains only specified `keys`.
```javascript
var obj1 = {
'a': 1,
'b': 2,
'c': 3
};
var obj2 = pick( obj1, 'b' );
// returns { 'b': 2 }
var obj3 = pick( obj1, [ 'b', 'c' ] );
// returns { 'b': 2, 'c': 3 }
```
If a key does not exist as an **own** property in a source `object`, the key is ignored.
```javascript
var obj1 = {
'a': 1,
'b': 2,
'c': 3
};
var obj2 = pick( obj1, 'd' );
// returns {}
```
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## Notes
- The function returns a **shallow** copy.
- The function **only** copies **own** properties. Hence, the function never copies inherited properties.
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## Examples
<!-- eslint no-undef: "error" -->
```javascript
var pick = require( '@stdlib/utils/pick' );
var obj1 = {
'a': 1,
'b': 2,
'c': 3,
'd': 4,
'e': 5
};
var obj2 = pick( obj1, [ 'b', 'c', 'e' ] );
// returns { 'b': 2, 'c': 3, 'e': 5 }
```
</section>
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