{"library":"lodash.identity","title":"Lodash Identity Function Module","description":"lodash.identity provides the `_.identity` function from the Lodash utility library as a standalone, modular package. This function is a no-operation (no-op) utility, meaning it returns the first argument it receives without modification. It's primarily used in functional programming contexts where an explicit callback or iterator is required but no data transformation is desired, serving as a placeholder or default for higher-order functions like `_.map`, `_.filter`, or `_.sortBy`. The `lodash` ecosystem, from which this module derives, is actively maintained with the latest stable version being `v4.18.1`. While individual modular packages like `lodash.identity` are stable and less frequently updated, the main Lodash library receives regular maintenance, including security patches and bug fixes. The modular approach helps minimize bundle sizes in client-side applications by allowing developers to import only specific functions rather than the entire library.","language":"javascript","status":"active","last_verified":"Sun Apr 19","install":{"commands":["npm install lodash.identity"],"cli":null},"imports":["import identity from 'lodash.identity';","const identity = require('lodash.identity');","import type { Identity } from 'lodash';"],"auth":{"required":false,"env_vars":[]},"quickstart":{"code":"import identity from 'lodash.identity';\n\n// Basic usage: identity returns its input directly\nconsole.log('Direct usage:', identity(42)); // Expected: 42\nconsole.log('With string:', identity('hello')); // Expected: 'hello'\n\n// Useful as a default iterator, e.g., with Array.prototype.map\nconst numbers = [1, 2, 3];\nconst mappedNumbers = numbers.map(identity);\nconsole.log('Mapped numbers (identity):', mappedNumbers); // Expected: [1, 2, 3]\n\n// Or with a custom function that expects an iterator\nfunction processItems(items, iterator = identity) {\n  return items.map(item => iterator(item));\n}\n\nconst processed = processItems(['a', 'b', 'c']);\nconsole.log('Processed with default identity:', processed); // Expected: ['a', 'b', 'c']\n\nconst processedWithTransform = processItems(['x', 'y', 'z'], item => item.toUpperCase());\nconsole.log('Processed with transform:', processedWithTransform); // Expected: ['X', 'Y', 'Z']\n\n// In some scenarios, it simplifies code where an explicit no-op is clearer\nconst config = {\n  onComplete: identity // No-op on completion\n};\n\nconsole.log('Config onComplete:', config.onComplete('task completed')); // Expected: 'task completed'","lang":"typescript","description":"Demonstrates the basic functionality of `identity` returning its input and its common use cases as a default iterator or no-operation callback.","tag":null,"tag_description":null,"last_tested":null,"results":[]},"compatibility":null}