arrayfilter

library1.1.2jsnpmunverified

A lightweight Node.js utility for filtering arrays by type, regex/string pattern, empty values, or duplicates. Version 1.1.2 (last updated in 2016) is the latest stable release. It provides functions like typeAccept, patternAccept, emptyReject, duplicateReject, and patternReject. Compared to lodash or ramda, it is minimal and focused on filtering only, but is no longer actively maintained. Suitable for small projects or legacy codebases running Node >=4.

testing

npm install arrayfilter

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INSTALL

IMPORT

SIG · ARRAYFILTER

arrayfilter

testingjavascriptv1.1.2

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

arrayfilter

✓ import arrayfilter from 'arrayfilter'

✗ const { arrayfilter } = require('arrayfilter')

Default import is the only way; named imports are not supported.

typeAccept

✓ const { typeAccept } = require('arrayfilter')

✗ import { typeAccept } from 'arrayfilter'

In CommonJS, destructure from the exported object. ESM usage is not documented.

emptyReject

✓ const emptyReject = require('arrayfilter').emptyReject

✗ import emptyReject from 'arrayfilter'

The function is a method on the default export, not a default export itself.

Demonstrates creating filter functions with arrayfilter and applying them to an array.

const arrayfilter = require('arrayfilter'); // Creating filtering functions const acceptString = arrayfilter.typeAccept('string'); const rejectEmpty = arrayfilter.emptyReject(); const rejectDuplicates = arrayfilter.duplicateReject(); const acceptFo = arrayfilter.patternAccept(/^fo/); // Example array const data = ['foo', '', 123, 'bar', 'foo', null, 'foobar']; // Apply filters const filtered = data .filter(acceptString) .filter(rejectEmpty) .filter(rejectDuplicates) .filter(acceptFo); console.log(filtered); // Output: ['foobar']

Debug

Known issues

deprecatedProject is no longer actively maintained; last update in 2016.

fix

Consider using lodash's filter or native Array.filter with custom logic.

affects: >=1.0.0

gotchatypeAccept('number') will not filter NaN because typeof NaN === 'number' in JavaScript.

fix

Use patternAccept(/^[0-9]+$/) or additional NaN check if needed.

affects: >=1.0.0

gotchaduplicateReject uses strict equality (===) for comparison; objects and arrays are compared by reference, not deep equality.

fix

Use a deduplication library like lodash.uniqWith for deep comparison.

affects: >=1.0.0

gotchapatternAccept and patternReject treat string patterns as literal strings, not regex; pass a RegExp object for regex matching.

fix

Use arrayfilter.patternAccept(new RegExp('fo')) or /fo/.

affects: >=1.0.0

Errors

Common errors & fixes

TypeError: arrayfilter.typeAccept is not a function

Importing as a named export from an ESM context when the package exports a CommonJS default.

fix

Use const arrayfilter = require('arrayfilter'); then arrayfilter.typeAccept.

Cannot find module 'arrayfilter'

Package not installed or not in node_modules.

fix

Run 'npm install arrayfilter' in your project directory.

arrayfilter.duplicateReject is not a function

Typo: the correct name is 'duplicateReject' (duplicate vs duplicate).

fix

Use arrayfilter.duplicateReject() (note the 'c' in 'duplicate').

Upgrade

Version history

1.1.2latest on npm

Audit

Dependencies

No dependency data recorded yet.

Agent activity

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Resources

githubhttps://github.com/okunishinishi/node-arrayfilter ↗

packagearrayfilter ↗

homepagehttps://github.com/okunishinishi/node-arrayfilter#readme ↗