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Lodash _.toPairsIn

Overview

lodash is a popular JavaScript utility library that provides a wide range of useful functions to make working with JavaScript easier. One of the many functions provided by lodash is the toPairsIn method. In simple terms, the toPairsIn method is used to convert an object into an array of key-value pairs.

The toPairsIn method iterates over an object's own and inherited enumerable string keyed properties and returns an array of key-value pairs. It's important to note that the order of the key-value pairs in the array is not guaranteed to be consistent across different JavaScript engines.

Here's a basic example of how to use the toPairsIn method:

const _ = require('lodash');

const myObject = {
  a: 1,
  b: 2,
  c: 3
};

const result = _.toPairsIn(myObject);

console.log(result);
// Output: [["a", 1], ["b", 2], ["c", 3]]

In this example, myObject is passed as an argument to the toPairsIn method, which returns an array of key-value pairs where the first element of each sub-array is the key and the second element is the corresponding value.

One important thing to note about the toPairsIn method is that it includes properties inherited from an object's prototype chain. This means that it will return key-value pairs for all enumerable properties found on the object, as well as any enumerable properties found on its prototype chain.

Overall, the toPairsIn method is a useful tool to convert objects into arrays of key-value pairs. Its ability to include properties inherited from an object's prototype chain makes it a versatile function that can be used in a wide range of situations.