poly-select
v1.0.0
Published
Pick selected properties from the given object or array
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poly-select
Picks given keys and associated values from an object or array
Motivation
When working data transformation pipelines, it is often needed to be able to filter out unused data leaving only a few pieces for downstream processing.
This tool is effectively a shorthand version of:
filter((x, key) => selectedKeys.indexOf(key) >= 0)
Features
- Works with objects and arrays
- Automatically curried
Installation
npm install poly-select
Testing
npm test
Usage
var select = require('poly-select');
var object = {
a: 100,
b: 200,
c: 'blah, blah'
};
var array = [
100,
200,
'blah, blah'
];
// Complete application
console.log(select(['a', 'c'], object)); // => { a: 100, c: 'blah, blah' }
console.log(select([0, 2], array)); // => [100, 'blah, blah']
// Partial application
var selectB = select('b');
console.log(selectB(object)); // => { b: 200 }
var select1 = select(1);
console.log(select1(array)); // => [200]