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README.md |
Node.js mixme
Merge multiple object recursively, with TypeScript support. The last object takes precedence over the previous ones. Only objects are merged. Arrays are overwritten.
- Zero dependencies
- Small size
- Pure functions
- ESM and CommonJS support
API
Function merge(...data)
The API is minimalist, pass as many literal objects as you wish, they will all be merged. This function is immutable, the source objects won't be altered.
import { merge } from 'mixme'
const target = merge({a: '1'}, {b: '2'});
// target is {a: '1', b: '2'}
Function mutate(...data)
Use the mutate
function to enrich an object. The first argument will be mutated:
import { mutate } from 'mixme'
const source = {a: '1'};
const target = mutate(source, {b: '2'});
target.c = '3';
// source and target are both {a: '1', b: '2', c: '3'}
Function clone(data)
It is possible to clone a literal object by simply calling mixme
with this object as the first argument. Use the clone
function in case you wish to clone any type of argument including arrays:
import { clone } from 'mixme'
const target = clone(['a', 'b'])
// target is now a copy of source
Function is_object_literal(object)
Use the is_object_literal
function to ensure an object is literate.
import { is_object_literal } from 'mixme'
// {} is literate
is_object_literal({})
// error is not literate
is_object_literal(new Error('Catch me'))
// Array is not literate
is_object_literal([])
Function snake_case(object)
Clone a object and convert its properties into snake case.
import { snake_case } from 'mixme'
snake_case({aA: '1', bB: cC: '2'})
// Return {a_a: '1', b_b: c_c: '2'}
Function compare(item_1, item_2)
Compare two items and return true if their values match.
import { compare } from 'mixme'
compare([{a: 1}], [{a: 1}])
// Return true
compare({a: 1}, {a: 2})
// Return false
Example
Create a new object from two objects:
import { merge } from 'mixme'
const obj1 = { a_key: 'a value', b_key: 'b value'}
const obj2 = { b_key: 'new b value'}
const result = merge(obj1, obj2)
assert.eql(result.b_key, 'new b value')
Merge an existing object with a second one:
import { mutate } from 'mixme'
const obj1 = { a_key: 'a value', b_key: 'b value'};
const obj2 = { b_key: 'new b value'};
const result = mutate(obj1, obj2)
assert.eql(result, obj1)
assert.eql(obj1.b_key, 'new b value')
Testing
Clone the repo, install the development dependencies and run the tests:
git clone http://github.com/wdavidw/node-mixme.git .
npm install
npm run test
Developers
To automatically generate a new version:
yarn run release
git push --follow-tags origin master
Package publication is handled by the CI/CD with GitHub action.
Note:
- On release, both the publish and test workflows run in parallel. Not very happy about it but I haven't found a better way.
yarn
does not call the "postrelease" script andnpm
fails if thepackage-lock.json
file is present and git ignored.
Contributors
- David Worms: https://github.com/wdavidw
- Paul Farault: https://github.com/PaulFarault
This package is developed by Adaltas.