How to use the cloneWith function from lodash

Find comprehensive JavaScript lodash.cloneWith code examples handpicked from public code repositorys.

lodash.cloneWith creates a deep clone of a given object with a customizer function applied to each cloned element.

lodash-contrib.commonjs.js

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module.exports.chunkContrib        = _.chunkContrib;
module.exports.clamp               = _.clamp;
module.exports.clone               = _.clone;
module.exports.cloneDeep           = _.cloneDeep;
module.exports.cloneDeepWith       = _.cloneDeepWith;
module.exports.cloneWith           = _.cloneWith;
module.exports.collate             = _.collate;
module.exports.compact             = _.compact;
module.exports.comparator          = _.comparator;
module.exports.complement          = _.complement;

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+ 92 other calls in file

lodash.js

GitHub: mdmarufsarker/lodash

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console.log(cloneDeep); // => { 'a': 1 }


const cloneDeepWith = _.cloneDeepWith({ 'a': 1 }, value => value === 1 ? 2 : value);
console.log(cloneDeepWith); // => { 'a': 2 }


const cloneWith = _.cloneWith({ 'a': 1 }, value => value === 1 ? 2 : value);
console.log(cloneWith); // => { 'a': 2 }


const conformsTo = _.conformsTo({ 'a': 1 }, { 'a': n => n === 1 });
console.log(conformsTo); // => true

+ 15 other calls in file

How does lodash.cloneWith work?

lodash.cloneWith is a method from the popular JavaScript utility library, Lodash, that creates a shallow clone of an object and allows developers to customize the cloning behavior for each property using a customizer function. When lodash.cloneWith is called, it creates a new object with the same properties as the original object, but with different values. The customizer function can be used to change the value of a specific property or omit it from the new object. It can also be used to recursively clone nested objects and arrays.

Ai Example

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const _ = require("lodash");

const obj = {
  a: 1,
  b: {
    c: 2,
    d: [3],
  },
};

const newObj = _.cloneWith(obj, (value) => {
  if (_.isNumber(value)) {
    return value * 2;
  }
});

console.log(newObj);
// Output: { a: 2, b: { c: 4, d: [6] } }

In this example, we have an object with nested values. We use _.cloneWith to create a new object that is a deep clone of the original object. We also pass in a customizer function that doubles the value of any numbers it encounters. The resulting object has all the same keys and values as the original, except any numbers have been doubled.

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