Elegant Objects

Elegant Objects (EO) is an object-oriented programming paradigm that renounces traditional techniques like null, getters-and-setters, code in constructors, mutable objects, static methods, annotations, type casting, implementation inheritance, data objects, etc.

Books:

Object Thinking
Elegant Objects (vol.1 and vol.2)

Online: Telegram chat.

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Twitter: #elegantobjects.

Videos:

Blogs:

Languages: EO (experimental).

Principles:

No null (why?)
No code in constructors (why?)
No getters and setters (why?)
No mutable objects (why?)
No static methods, not even private ones (why?)
No instanceof, type casting, or reflection (why?)
No public methods without contract (interface) (why?)
No statements in test methods except assertThat (why?)
No implementation inheritance (why? and why?)

Frameworks/libraries:

Takes by @yegor256 (Java)
Cactoos by @yegor256 (Java)
Atoms by @icarus-consulting (C# port of Cactoos)
Kactoos by @neonailol (Kotlin port of Cactoos)
OO-Atom by @pragmatic-objects (Java)
OO-Tests by @pragmatic-objects (Java)
excel-io by @Vatavuk (Java)
cactoos-crypto by @g4s8 (Java)
cactoos-matchers by @llorllale (Java)
cactoos-math by @VsSekorin (Java)
cactoos-http by @yegor256 (Java)
cactoos-jdbc by @fabriciofx (Java)
cactoos-json by @VsSekorin (Java)
eo-yaml by @amihaiemil (Java)
docker-java-api by @amihaiemil (Java)
sql-boot by @mgramin (Kotlin)
2out by @DronMDF (C++)
eo-envelopes by @victornoel (Java)
matchers-json (OO unit testing for JSON) by @g4s8 (Java)
laconic-velocity by @dgroup (Java)
dry-struct by @dry-rb (ruby)
term4j by @dgroup (Java)
mbox4j by @dgroup (Java)
Page by @guseyn (Node.js)
cutie by @guseyn (Node.js)
verano-http (OO http client) by @Vatavuk (Java)
Xive by @icarus-consulting (XML speaking storage layer in C#)
finapi-java-client (OO client for finAPI) by @proshin-roman (Java)
nullfree Null analyser by @nikialeksey

Products:

If your project is maintained well and designed with the EO spirit in mind, please submit it to the annual quality award and win up to $4,096.

Fans (in alphabetical order): @aistomin, @alex-semenyuk, @alhadhrami @aliceice @amihaiemil, @biboran, @dgroup, @dmydlarz, @driver733, @DronMDF, @eduardsi, @fabriciofx, @filfreire, @g4s8, @koeeenig, @kogoia, @maratori, @meerownymous, @mgramin, @nicholasruunu, @nikialeksey @paulodamaso, @proshin-roman, @RRochegude, @SilasReinagel, @sivaa, @skapral, @smallcreep, @tomasz_bawor, @t-izbassar, @vatavuk, @vssekorin.

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