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[Utility & Helpers](/categories/utility) 4. / 5. sanmai/lazy-linq AbandonedArchivedLibrary[Utility & Helpers](/categories/utility) sanmai/lazy-linq ================ .NET LINQ-like library with mandatory lazy evaluation v0.6(6y ago)2121[10 issues](https://github.com/sanmai/LazyLINQ/issues)[1 PRs](https://github.com/sanmai/LazyLINQ/pulls)Apache-2.0PHPPHP ^7.0 Since Mar 14Pushed 5y ago1 watchersCompare [ Source](https://github.com/sanmai/LazyLINQ)[ Packagist](https://packagist.org/packages/sanmai/lazy-linq)[ RSS](/packages/sanmai-lazy-linq/feed)WikiDiscussions master Synced yesterday READMEChangelog (9)Dependencies (10)Versions (12)Used By (0) [![Build Status](https://camo.githubusercontent.com/53cb09fb1a895c7343dfe0bf932521546edbde2764f0877ea81e58d97e5b63bb/68747470733a2f2f7472617669732d63692e6f72672f73616e6d61692f4c617a794c494e512e7376673f6272616e63683d6d6173746572)](https://travis-ci.org/sanmai/LazyLINQ)[![Coverage Status](https://camo.githubusercontent.com/16d552ce1899a8b677f2894f67d002bde9759c6666fb93dfc5091f99daaf3a3a/68747470733a2f2f636f766572616c6c732e696f2f7265706f732f6769746875622f73616e6d61692f4c617a794c494e512f62616467652e7376673f6272616e63683d6d6173746572)](https://coveralls.io/github/sanmai/LazyLINQ?branch=master)[![Infection MSI](https://camo.githubusercontent.com/a614d3f58090dc0ef176c1b35a3add2f23671a2849e25038b350037d08c63aeb/68747470733a2f2f62616467652e737472796b65722d6d757461746f722e696f2f6769746875622e636f6d2f73616e6d61692f4c617a794c494e512f6d75746174696f6e2d6261646765)](https://infection.github.io)[![Codacy Badge](https://camo.githubusercontent.com/528a13d1b97d153a1a0241015e1138358913c6727e0602ecfeef639a6010600c/68747470733a2f2f6170692e636f646163792e636f6d2f70726f6a6563742f62616467652f47726164652f3338353764363863316163623465356538316462373034396237383439343061)](https://www.codacy.com/app/sanmai/LazyLINQ)[![Maintainability](https://camo.githubusercontent.com/b2a5dd83e2e1b6f997dec22d9930f3cd59745fe583742b8567f2dc0054e9f63a/68747470733a2f2f6170692e636f6465636c696d6174652e636f6d2f76312f6261646765732f35313964326430383334613865323534613662662f6d61696e7461696e6162696c697479)](https://codeclimate.com/github/sanmai/LazyLINQ/maintainability) This library implements most of [the API methods](https://msdn.microsoft.com/en-us/library/system.linq.enumerable.aspx) from .NET static class `System.Linq.Enumerable` which do not require having the whole data set in memory. If you're used to LINQ query operations from .NET, you should feel like home. Powered by generators, this library works in a lazy way: instead of doing computing on the whole sequence at once, it would only do necessary computing while you're iterating through the sequence. Install ======= [](#install) ``` composer require sanmai/lazy-linq ``` API Compatibility ================= [](#api-compatibility) MethodDetails✔️Aggregate()✔️All()✔️Any()✔️Append()Returns a new collection.AsEnumerable()Not applicable to PHP.✔️Average()✔️Cast()✔️Concat()✔️Contains()✔️Count()DefaultIfEmpty()Not applicable.✔️Distinct()Only removes repeated elements, think `uniq`.✔️ElementAt()`@throws` 💣✔️ElementAtOrDefault()Always a null default value, `@throws` 💣✔️Empty()Returns a new empty collection.✔️Except()Returns a new collection.✔️First()FirstOrDefault()Collections are not typed in PHP.GroupBy()Needs all data at once.GroupJoin()Intersect()Join()✔️Last()LastOrDefault()Not applicable.LongCount()No separate `long` type in PHP.✔️Max()✔️Min()✔️OfType()There's also `ofClass()` for classes.OrderBy()Needs to have the whole set of data in memory to function.OrderByDescending()✔️Prepend()Returns a new collection.✔️Range()Semantically different from standard `range()` function.✔️Repeat()Reverse()Needs all data at once.✔️Select()✔️SelectMany()SequenceEqual()✔️Single()`@throws` 💣SingleOrDefault()✔️Skip()✔️SkipWhile()✔️Sum()✔️Take()Returns a new collection.✔️TakeWhile()Returns a new collection.ThenBy()Sorting needs all data at once.ThenByDescending()Sorting needs all data at once.✔️ToArray()ToDictionary()Not applicable.ToList()Not applicable.ToLookup()Not applicable.Union()Needs to store all previously processed data.✔️Where()✔️Zip()Returns a new collection.Only non-lazy (or eager) methods are left out as they can't have a correct lazy implementation with generators. Sure, they could be implemented as standard deferred methods, but still, they'll want all the data at once. For all inputs, keys are not exported nor used. If you absolutely need to access keys, consider storing them with the data. Durability ========== [](#durability) This library is built to last. Whatever you throw at it, it should just work. There are only few methods marked with a 💣 above that may throw an exception: .NET API requires that, so it was unavoidable. Other than that, you can expect only standard language errors to happen. ### Health Score 21 — LowBetter than 19% of packages Maintenance0 Infrequent updates — may be unmaintained Popularity9 Limited adoption so far Community11 Small or concentrated contributor base Maturity55 Maturing project, gaining track record Bus Factor1 Top contributor holds 98.8% of commits — single point of failure How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window. **Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores. **Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement. **Maturity (30%)** — Project age, version count, PHP version support, and release stability. ### Release Activity Cadence Every ~85 days Recently: every ~141 days Total 9 Last Release 2294d ago PHP version history (2 changes)v0.1PHP >=7 v0.3-betaPHP ^7.0 ### Community Maintainers ![](https://www.gravatar.com/avatar/edcb8dde95c71b1c97c3c91e57d3548795fa2014c657744fb878e2be3b5949fc?d=identicon)[sanmai](/maintainers/sanmai) --- Top Contributors [![sanmai](https://avatars.githubusercontent.com/u/139488?v=4)](https://github.com/sanmai "sanmai (161 commits)")[![dependabot-preview[bot]](https://avatars.githubusercontent.com/in/2141?v=4)](https://github.com/dependabot-preview[bot] "dependabot-preview[bot] (1 commits)")[![stickler-ci](https://avatars.githubusercontent.com/u/16011037?v=4)](https://github.com/stickler-ci "stickler-ci (1 commits)") ### Code Quality TestsPHPUnit Static AnalysisPHPStan, Psalm Code StylePHP CS Fixer Type Coverage Yes ### Embed Badge ![Health badge](/badges/sanmai-lazy-linq/health.svg) ``` [![Health](https://phpackages.com/badges/sanmai-lazy-linq/health.svg)](https://phpackages.com/packages/sanmai-lazy-linq) ``` ### Alternatives [markbaker/enumhelper A small library that provides Helper Traits for PHP 8.1 Enums 2819.4k1](/packages/markbaker-enumhelper)[thunderer/numbase Convert any number between arbitrary bases 242.3k](/packages/thunderer-numbase)[asgardcms/block A module to create small blocks of content to display anywhere on the site. 126.0k](/packages/asgardcms-block) PHPackages © 2026 [Directory](/)[Categories](/categories)[Trending](/trending)[Changelog](/changelog)[Analyze](/analyze)