Lodash Internal `arrayEach` Utility

Common errors

• TypeError: Cannot read properties of undefined (reading 'call') at Function.arrayEach

  cause Attempting to call `arrayEach` with a non-array or null/undefined `collection` argument.
  fix Ensure the first argument passed to `arrayEach` is always an array. Example: `arrayEach([], callback);`

• TypeError: arrayEach is not a function

  cause Incorrectly trying to import `arrayEach` using ES module syntax or destructuring from the CommonJS package.
  fix Use the correct CommonJS `require` syntax: `const arrayEach = require('lodash._arrayeach');`

• Error: Cannot find module 'lodash._arrayeach'

  cause The package `lodash._arrayeach` has not been installed or is not resolvable in the current environment.
  fix Install the package via npm: `npm install --save lodash._arrayeach`

Warnings

• breaking This `lodash._arrayeach` package is based on Lodash v3.0.0. The main `lodash` library moved to v4.0.0 in 2015, which introduced significant backward-incompatible changes across the entire library. Using this v3 internal module alongside a modern v4+ `lodash` installation may lead to inconsistent behavior or conflicts due to differing internal implementations.
  Fix: Migrate to `_.forEach` from a current `lodash` package (v4.x) or `lodash-es` for tree-shakable builds. Avoid direct usage of internal modules like `lodash._arrayeach`.
• deprecated This package is an abandoned internal module from Lodash v3.0.0 and has not received updates since its initial release. Modern Lodash (v4.x) provides similar or improved functionality through its public API (e.g., `_.forEach` for array iteration) and `lodash-es` for modular, tree-shakable builds, which are actively maintained.
  Fix: Refactor code to use `_.forEach` directly from the main `lodash` package or `lodash-es`. For example: `import { forEach } from 'lodash'; forEach(array, callback);`
• gotcha Relying on internal modules like `lodash._arrayeach` is discouraged as they are not part of Lodash's stable public API. Their behavior, existence, and compatibility can change without warning across major versions of the main `lodash` library, leading to unexpected issues during upgrades.
  Fix: Always use public API functions provided by the main `lodash` package. For array iteration, `_.forEach` is the robust and supported choice.
• gotcha Using older versions of any library, including `lodash` and its internal modules from v3, means foregoing security patches and bug fixes. For example, `lodash` v4.18.0 fixed prototype pollution vulnerabilities in `_.unset` and `_.omit` (GHSA-f23m-r3pf-42rh) which would not be present in a v3 codebase.
  Fix: Upgrade to the latest stable version of the main `lodash` package (v4.x) to benefit from continuous security maintenance and bug fixes. Avoid using outdated internal modules.

Install

• npm install lodash._arrayeach npm
• yarn add lodash._arrayeach yarn
• pnpm add lodash._arrayeach pnpm

Imports

• arrayEach
  wrong:

  import { arrayEach } from 'lodash._arrayeach';

  correct:

  const arrayEach = require('lodash._arrayeach');

  This package is a CommonJS module from Lodash v3. It does not support ES module imports directly. Attempting to use named imports will result in a TypeError.

Quickstart

Demonstrates how to import and use the internal `arrayEach` function to iterate over an array.

const arrayEach = require('lodash._arrayeach');

const numbers = [10, 20, 30, 40, 50];
const doubledNumbers = [];

console.log('Original numbers:', numbers);

arrayEach(numbers, (value, index) => {
  doubledNumbers[index] = value * 2;
});

console.log('Doubled numbers:', doubledNumbers);

// Demonstrating the internal nature: it's not the public _.forEach
const sparseArray = [1, , 3]; // eslint-disable-line no-sparse-arrays
const resultSparse = [];
arrayEach(sparseArray, (value) => resultSparse.push(value === undefined ? 'undefined' : value));
console.log('ArrayEach on sparse array (handles undefined):', resultSparse);