Registry / serialization / collection-utils

collection-utils

library1.0.1jsnpmunverified

The `collection-utils` package, at version `1.0.1`, provides a set of fundamental utility functions designed to simplify common operations on JavaScript collections, primarily arrays and objects. Published by `quicktype`, a project focused on generating type bindings from JSON schemas, this library likely serves as an internal dependency or a lightweight, standalone offering for basic collection manipulation. It ships with TypeScript types, facilitating type-safe usage in TypeScript projects. Given its current version, it appears stable but may have a focused, rather than expansive, feature set, with a release cadence potentially tied to the `quicktype` ecosystem's needs. Key differentiators, beyond its small footprint and TypeScript support, are not explicitly detailed in public documentation, suggesting a design for efficiency and straightforward use rather than broad, complex functionality found in larger utility libraries like Lodash.

serialization

npm install collection-utils

github ↗package ↗

INSTALL

IMPORT

SIG · COLLECTION-UTILS

collection-utils

serializationjavascriptv1.0.1

Install

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Import

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Disk

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Pass rate

0/ 6

Env Coverage0 / 6

glibc

18–22

musl

18–22

Install & Compatibility

Where this runs

tested against v? · npm install

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

node 18–226 runs

build_error

glibc

node 18–226 runs

build_error

Code

Verified usage

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

map

✓ import { map } from 'collection-utils';

✗ const map = require('collection-utils').map;

This library is primarily designed for ES modules. While CommonJS might technically work, ESM named imports are the canonical and recommended approach for tree-shaking and modern tooling.

filter

✓ import { filter } from 'collection-utils';

✗ import collectionUtils from 'collection-utils'; collectionUtils.filter(...);

Functions are exported individually as named exports, promoting modularity and efficient bundling. Avoid attempting to import a default object containing all utilities.

isEmpty

✓ import { isEmpty } from 'collection-utils';

Common utility functions like `isEmpty` are provided as direct named exports. Ensure your tooling is configured for ES module resolution.

Demonstrates basic usage of `map`, `filter`, and `isEmpty` functions on both arrays and objects, showcasing type-safe operations.

import { map, filter, isEmpty } from 'collection-utils'; interface User { id: number; name: string; isActive: boolean; roles: string[]; } const users: User[] = [ { id: 1, name: 'Alice', isActive: true, roles: ['admin', 'editor'] }, { id: 2, name: 'Bob', isActive: false, roles: ['viewer'] }, { id: 3, name: 'Charlie', isActive: true, roles: ['editor'] }, { id: 4, name: 'David', isActive: false, roles: [] } ]; // Use 'map' to transform a collection const userNames = map(users, user => user.name); console.log('User Names:', userNames); // Expected: ['Alice', 'Bob', 'Charlie', 'David'] // Use 'filter' to select elements based on a condition const activeEditors = filter(users, user => user.isActive && user.roles.includes('editor')); console.log('Active Editors:', activeEditors.map(u => u.name)); // Expected: ['Alice', 'Charlie'] // Use 'isEmpty' to check if a collection is empty const hasActiveUsers = !isEmpty(filter(users, user => user.isActive)); console.log('Are there any active users?', hasActiveUsers); // Expected: true const emptyArray: any[] = []; console.log('Is emptyArray empty?', isEmpty(emptyArray)); // Expected: true const emptyObject = {}; console.log('Is emptyObject empty?', isEmpty(emptyObject)); // Expected: true

Debug

Known issues

gotchaMany collection utility functions, especially those interacting with objects, might operate on shallow copies or mutate inputs if not explicitly designed for immutability. Always check function documentation or test for mutation if immutability is critical.

fix

Always assume potential mutation unless documentation states otherwise. For critical state, explicitly create deep copies of objects/arrays before passing them to utility functions using `structuredClone` or a dedicated deep-cloning utility.

affects: >=1.0.0

gotchaPerformance considerations: While convenient, using utility functions on extremely large collections (thousands or millions of items) in tight loops can introduce overhead compared to raw JavaScript loops. Profile your code if performance becomes a bottleneck.

fix

For performance-critical sections with very large datasets, consider direct `for...of` or `for` loops, or specialized data structures. For most common use cases, the overhead is negligible.

affects: >=1.0.0

gotchaThe library is relatively minimal. Developers coming from larger utility libraries like Lodash or Ramda might expect a broader array of specialized functions (e.g., deep merge, debounce, throttle, advanced string manipulation) which are not present here.

fix

Review the source code or specific API documentation for available functions. If a required utility is missing, consider importing it from another specialized library or implementing it manually.

affects: >=1.0.0

Errors

Common errors & fixes

TypeError: (0 , collection_utils__WEBPACK_IMPORTED_MODULE_0__.map) is not a function

This typically indicates that the module was imported incorrectly, or that tree-shaking removed the function because it appeared unused, or a bundler issue.

fix

Ensure you are using named imports: `import { map } from 'collection-utils';`. Verify your bundler (e.g., Webpack, Rollup) is configured for ES module resolution and tree-shaking correctly, especially in environments where CommonJS is prevalent.

Property 'map' does not exist on type 'typeof import("collection-utils")'.

This TypeScript error means that the imported `collection-utils` module, when treated as a single object (e.g., `import * as utils from 'collection-utils'; utils.map(...)`), does not expose `map` as a property directly on that root object.

fix

Use named imports for individual functions: `import { map } from 'collection-utils';`. The library uses named exports for its utilities.

Upgrade

Version history

1.0.1latest on npm

Audit

Dependencies

No dependency data recorded yet.

Agent activity

8 hits · last 30 days

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Amazon

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Resources

githubhttps://github.com/quicktype/collection-utils ↗

packagehttps://www.npmjs.com/package/collection-utils ↗