StackGenVis: Alignment of Data, Algorithms, and Models for Stacking Ensemble Learning Using Performance Metrics
https://doi.org/10.1109/TVCG.2020.3030352
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99 lines
3.2 KiB
99 lines
3.2 KiB
# get-value [](http://badge.fury.io/js/get-value) [](https://travis-ci.org/jonschlinkert/get-value)
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> Use property paths (`a.b.c`) to get a nested value from an object.
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**[Benchmarks](./benchmark)**
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This is 10x faster and more performant than [dot-prop](https://github.com/sindresorhus/dot-prop), and it passes all of the dot-prop tests.
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Of the libs benchmarked, _dot-prop was the least performant_:
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```bash
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#1: deep
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get-value x 3,308,335 ops/sec ±1.32% (94 runs sampled)
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dot-prop x 197,631 ops/sec ±1.27% (94 runs sampled)
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getobject x 218,635 ops/sec ±1.51% (91 runs sampled)
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#2: shallow
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get-value x 5,762,976 ops/sec ±1.21% (95 runs sampled)
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dot-prop x 695,892 ops/sec ±1.42% (95 runs sampled)
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getobject x 724,493 ops/sec ±1.46% (93 runs sampled)
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```
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Also, get-value supports escaping dots in paths, which is common when object keys are file paths with extensions, dot-prop does not.
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## Install
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Install with [npm](https://www.npmjs.com/)
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```sh
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$ npm i get-value --save
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```
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Install with [bower](http://bower.io/)
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```sh
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$ bower install get-value --save
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```
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## Usage
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```js
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var get = require('get-value');
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var obj = {a: {b : {c: {d: 'foo'}}}, e: [{f: 'g'}]};
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get(obj, 'a.b.c');
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//=> {d: 'foo'}
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get(obj, 'a.b.c.d');
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//=> 'foo'
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get(obj, 'e[0].f');
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//=> 'g'
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```
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**key as an array**
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Optionally pass the key as an array (this is useful when you need to dynamically build up the property name)
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```js
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var obj = {a: {b: 'c'}};
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get(obj, ['a', 'b']);
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//=> 'c'
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```
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## Related projects
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* [has-any](https://www.npmjs.com/package/has-any): Returns true if an object has any of the specified keys. | [homepage](https://github.com/jonschlinkert/has-any)
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* [has-any-deep](https://www.npmjs.com/package/has-any-deep): Return true if `key` exists deeply on the given object. | [homepage](https://github.com/jonschlinkert/has-any-deep)
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* [has-value](https://www.npmjs.com/package/has-value): Returns true if a value exists, false if empty. Works with deeply nested values using… [more](https://www.npmjs.com/package/has-value) | [homepage](https://github.com/jonschlinkert/has-value)
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* [set-value](https://www.npmjs.com/package/set-value): Create nested values and any intermediaries using dot notation (`'a.b.c'`) paths. | [homepage](https://github.com/jonschlinkert/set-value)
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* [unset-value](https://www.npmjs.com/package/unset-value): Delete nested properties from an object using dot notation. | [homepage](https://github.com/jonschlinkert/unset-value)
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## Contributing
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Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](https://github.com/jonschlinkert/get-value/issues/new).
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## Running tests
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Install dev dependencies:
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```sh
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$ npm i -d && npm test
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```
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## Author
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**Jon Schlinkert**
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+ [github/jonschlinkert](https://github.com/jonschlinkert)
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+ [twitter/jonschlinkert](http://twitter.com/jonschlinkert)
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## License
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Copyright © 2014-2015 [Jon Schlinkert](https://github.com/jonschlinkert)
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Released under the MIT license.
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***
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_This file was generated by [verb-cli](https://github.com/assemble/verb-cli) on October 28, 2015._ |