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Lodash _.at

Overview

Lodash is a popular JavaScript utility library that provides a variety of helpful methods for common programming tasks. One such method is the _.at method, which allows you to extract values from an object at specified paths.

The _.at method takes two arguments: the first argument is the object you want to extract values from, and the second argument is an array of strings that represent the paths to the values you want to extract. The paths can be specified using dot notation or square brackets notation, and can include wildcards for more advanced selections.

Here is an example of how you could use the _.at method:

const obj = {
  name: 'John Doe',
  address: {
    street: '123 Main St.',
    city: 'Anytown USA',
    state: 'CA'
  },
  phoneNumbers: [
    '555-1234',
    '555-5678'
  ]
};

const result = _.at(obj, ['name', 'address.street', 'phoneNumbers[0]']);

console.log(result);
// Output: ['John Doe', '123 Main St.', '555-1234']

In this example, we specify an object with nested properties and an array property. We then pass this object and an array of paths to the _.at method. The method extracts the values at the specified paths ('name', 'address.street', and 'phoneNumbers[0]') and returns them as an array.

Overall, the _.at method is a helpful utility for extracting values from objects in a flexible and easy-to-use way. It can be particularly useful when working with nested objects or arrays.