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lodash.mergewith
Advanced tools
The lodash.mergewith package is a utility library that provides a method for deep merging objects. It allows for custom merge functions to be specified, enabling more complex merging strategies than the default deep merge.
Deep Merging Objects
This feature allows for deep merging of objects with a custom merge function. In this example, arrays are concatenated instead of being replaced.
const _ = require('lodash.mergewith');
const object = { 'a': [{ 'b': 2 }, { 'd': 4 }] };
const other = { 'a': [{ 'c': 3 }, { 'e': 5 }] };
function customizer(objValue, srcValue) {
if (Array.isArray(objValue)) {
return objValue.concat(srcValue);
}
}
const result = _.mergeWith(object, other, customizer);
console.log(result); // { 'a': [{ 'b': 2, 'c': 3 }, { 'd': 4, 'e': 5 }] }
The deepmerge package is another utility for deep merging objects. It provides a simple API for merging objects and arrays, but does not support custom merge functions out of the box. It is useful for straightforward deep merges without the need for custom logic.
The merge-options package allows for deep merging of objects with options for customizing the merge behavior. It is similar to lodash.mergewith in that it supports custom merge functions, but it provides a different API and additional options for controlling the merge process.
The Lodash method _.mergeWith
exported as a Node.js module.
Using npm:
$ {sudo -H} npm i -g npm
$ npm i --save lodash.mergewith
In Node.js:
var mergeWith = require('lodash.mergewith');
See the documentation or package source for more details.
FAQs
The Lodash method `_.mergeWith` exported as a module.
We found that lodash.mergewith demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 2 open source maintainers collaborating on the project.
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