lodash._pickbyarray

// This example demonstrates the usage of the legacy lodash._pickbyarray module (v3.x). // This internal utility was designed for specific use cases within the Lodash core // when an array of keys needed to be processed and optionally filtered. // For general object filtering based on a predicate, use the public _.pickBy from the main 'lodash' package (v4.x+). const pickByArray = require('lodash._pickbyarray'); const sourceObject = { id: 1, name: 'Widget', price: 9.99, category: 'Electronics', stock: 150 }; // Simulate an array of keys that might be selected by another internal Lodash process. const keysToConsider = ['name', 'price', 'stock', 'nonExistentKey']; // Use pickByArray: it typically takes the object, an array of keys to process, // and an optional iteratee/predicate applied to values of those specific keys. const pickedSubset = pickByArray(sourceObject, keysToConsider, (value, key) => { // This predicate filters *among the provided keys*. // Only pick keys where the value is a number and greater than 10. return typeof value === 'number' && value > 10; }); console.log('Original object:', sourceObject); console.log('Keys considered by internal logic:', keysToConsider); console.log('Result using legacy lodash._pickbyarray (filtered subset):', pickedSubset); // Expected output: { stock: 150 } (as 9.99 is not > 10) // For comparison, using the modern, public `_.pickBy` from the main Lodash library: const _ = require('lodash'); // Using require for consistency with the example, but import { pickBy } from 'lodash-es' is preferred for ESM const publicPickByResult = _.pickBy(sourceObject, (value) => { // `_.pickBy` filters the entire object based on the predicate. return typeof value === 'number' && value > 10; }); console.log('Result using modern _.pickBy (entire object filtered):', publicPickByResult); // Expected output: { stock: 150 }