Type variance: Revision history

9 July 2026

• curprev 07:5007:50, 9 July 2026 Fcbs3 talk contribs m 54,951 bytes +6 →Use-site variance annotations (wildcards): PECS undo

16 June 2026

• curprev 12:2212:22, 16 June 2026 W.andrea talk contribs m 54,945 bytes −54 →Etymology undo
• curprev 12:2112:21, 16 June 2026 W.andrea talk contribs 54,999 bytes +40 →Etymology: uncited section undo
• curprev 00:0900:09, 16 June 2026 QuantumNinus talk contribs 54,959 bytes +78 →Etymology undo
• curprev 00:0700:07, 16 June 2026 QuantumNinus talk contribs m 54,881 bytes 0 reorder undo

23 April 2026

• curprev 16:1416:14, 23 April 2026 W.andrea talk contribs 54,881 bytes +423 →External links: Rescue "Fabulous" link and add details. undo
• curprev 15:5115:51, 23 April 2026 W.andrea talk contribs m 54,458 bytes +1 →top: fix capitalization for last edit undo
• curprev 15:2215:22, 23 April 2026 ~2026-25036-88Temporary account has expired talk 54,457 bytes +29 Added context to introduction undo Tags: Mobile edit Mobile web edit

30 March 2026

• curprev 10:4210:42, 30 March 2026 Jerryobject talk contribs 54,428 bytes +247 WP:LINKs: 1st instance adds, update-standardizes, needless-WP:PIPEs > WP:NOPIPEs. Small WP:COPYEDITs WP:EoS clarify. MOS:FIRSTABBReviations define-clarify before parenthetic WP:ABBRs. Adds: WP:CATEGORYs, MOS:COMMENT. undo

23 December 2025

• curprev 19:2219:22, 23 December 2025 Ohnem talk contribs 54,181 bytes +8 Link suggestions feature: 2 links added. undo Tags: Visual edit Newcomer task Suggested: add links

27 October 2025

• curprev 17:5417:54, 27 October 2025 Closed Limelike Curves talk contribs 54,173 bytes −66 Rearrange undo Tag: Visual edit
• curprev 02:4202:42, 27 October 2025 Closed Limelike Curves talk contribs m 54,239 bytes 0 Closed Limelike Curves moved page Covariance and contravariance (computer science) to Type variance undo

22 October 2025

• curprev 17:2417:24, 22 October 2025 YourLocalZakkFromSomewhere talk contribs 54,239 bytes +12 Link suggestions feature: 3 links added. undo Tags: Visual edit Newcomer task Suggested: add links

20 September 2025

• curprev 05:0905:09, 20 September 2025 2605:8d80:13e6:8748:dd05:b98b:8f8c:fec4 talk 54,227 bytes +1 No edit summary undo Tags: Mobile edit Mobile app edit iOS app edit App section source

19 August 2025

• curprev 07:5807:58, 19 August 2025 Bender the Bot talk contribs m 54,226 bytes +2 →Comparing declaration-site and use-site annotations: HTTP to HTTPS for Cornell University undo Tag: AWB

28 May 2025

• curprev 02:5202:52, 28 May 2025 W.andrea talk contribs 54,224 bytes +29 split footnotes and references undo
• curprev 02:4502:45, 28 May 2025 W.andrea talk contribs 54,195 bytes 0 manual RV: wrong plus contradicts the rest of the article undo Tag: Undo

27 May 2025

• curprev 20:0920:09, 27 May 2025 90.189.205.194 talk 54,195 bytes 0 Bivariance means equality of types. undo Tags: Reverted Visual edit Mobile edit Mobile web edit
• curprev 20:0420:04, 27 May 2025 90.189.205.194 talk 54,195 bytes 0 Bivariance means equality of types. undo Tags: Reverted Visual edit Mobile edit Mobile web edit

28 March 2025

• curprev 20:0220:02, 28 March 2025 Chriswjohnson talk contribs 54,195 bytes +36 Reworded the second paragraph, because the first sentence's structure, built around "how … relates to …", breaks its definition into separated halves, and readers must infer (due to the vagueness of "how") what type of thing "variance" might be. The next two sentences, both rhetorical questions, are converted to a single sentence of statements. NOTE: This edit would be significantly improved by enumerating variance types in sentence 1, and stating their effects on the examples in sentence 2. undo

18 March 2025

• curprev 14:3714:37, 18 March 2025 W.andrea talk contribs 54,159 bytes −31 →top: The lead doesn't need to be rewritten IMO. There are some things that could be improved, I suppose, but nothing major. Please be more specific if needed. undo
• curprev 14:2414:24, 18 March 2025 W.andrea talk contribs m 54,190 bytes +38 →Contravariant method parameter type: +links undo
• curprev 07:4307:43, 18 March 2025 180.150.37.222 talk 54,152 bytes +31 Lead does not seem to match wiki guidelines undo Tag: Visual edit

2 March 2025

• curprev 01:3701:37, 2 March 2025 Lilyblossom talk contribs 54,121 bytes −1 →Covariant arrays in Java and C#: extra space undo
• curprev 01:3601:36, 2 March 2025 Lilyblossom talk contribs 54,122 bytes +19 →Covariant arrays in Java and C#: reword comment undo

20 November 2024

• curprev 12:5812:58, 20 November 2024 W.andrea talk contribs m 54,103 bytes +2 rv grammar regressions undo
• curprev 06:5306:53, 20 November 2024 TocaTheFrog talk contribs m 54,101 bytes −3 Grammar and punctuation fixes undo Tags: Visual edit Newcomer task Newcomer task: references

28 June 2024

• curprev 00:4600:46, 28 June 2024 Citation bot talk contribs 54,104 bytes −22 Removed parameters. | Use this bot. Report bugs. | Suggested by Abductive | #UCB_webform 2175/3850 undo

22 June 2024

• curprev 14:4514:45, 22 June 2024 W.andrea talk contribs 54,126 bytes +35 →Summary of variance and inheritance: no citations undo
• curprev 12:4612:46, 22 June 2024 212.92.201.134 talk 54,091 bytes −40 I was deleting Scala from the table "The following table summarizes the rules for overriding methods in the languages discussed above." As far as I know, Scala non-generic (concrete) parameters have no contravariance, and no covariance either (except return type). Scala supports contravariance (and covariance) with generic parameters (in generic classes and generic methods) and with abstract types (for example: type T <: A). undo

23 December 2023

• curprev 21:4221:42, 23 December 2023 W.andrea talk contribs 54,131 bytes +4 Undid revision 1191354127 by DuncanSungWKim (talk). Cf. verbiage at Function (mathematics). undo Tag: Undo
• curprev 01:0501:05, 23 December 2023 DuncanSungWKim talk contribs m 54,127 bytes −4 No edit summary undo Tags: Reverted Visual edit: Switched

11 September 2023

• curprev 11:3511:35, 11 September 2023 180.233.127.65 talk 54,131 bytes +35 →Summary of variance and inheritance: Made table layout more logical undo Tags: Mobile edit Mobile web edit

13 August 2023

• curprev 06:4506:45, 13 August 2023 209.203.60.197 talk 54,096 bytes 0 →Formal definition undo

10 August 2023

• curprev 16:0316:03, 10 August 2023 Kali the ilo talk contribs m 54,096 bytes 0 OCaml does not permit types to be capitalized. undo

16 July 2023

• curprev 01:0701:07, 16 July 2023 Jlwoodwa talk contribs m 54,096 bytes +11 upd link undo

11 July 2023

• curprev 21:0921:09, 11 July 2023 Vilhelm.s talk contribs 54,085 bytes −5 →C# examples: "fatal" could be either a run-time or compile-time error undo
• curprev 20:5520:55, 11 July 2023 Vilhelm.s talk contribs 54,090 bytes −273 this paragraph was just wrong undo

22 June 2023

• curprev 19:2419:24, 22 June 2023 W.andrea talk contribs 54,363 bytes +275 →top: WP:REFERS. Bold "Invariant". Add a bunch of links. Grammar. undo
• curprev 03:3303:33, 22 June 2023 Cngzz1 talk contribs 54,088 bytes +338 Add in-line citation and information undo

17 June 2023

• curprev 13:1413:14, 17 June 2023 Citation bot talk contribs 53,750 bytes +20 Add: date. | Use this bot. Report bugs. | Suggested by Headbomb | Linked from Wikipedia:WikiProject_Academic_Journals/Journals_cited_by_Wikipedia/Sandbox2 | #UCB_webform_linked 193/999 undo

3 June 2023

• curprev 17:4117:41, 3 June 2023 WikiCleanerBot talk contribs m 53,730 bytes 0 v2.05b - Bot T20 CW#61 - Fix errors for CW project (Reference before punctuation) undo Tag: WPCleaner

30 May 2023

• curprev 02:3102:31, 30 May 2023 W.andrea talk contribs 53,730 bytes −1,204 Remove duplicate citations. undo
• curprev 02:0802:08, 30 May 2023 Cngzz1 talk contribs 54,934 bytes +1,602 Remove duplicate references, use {{rp}} instead. Fixed citation formatting and added author name. Added more inline citations. undo

29 May 2023

• curprev 20:1720:17, 29 May 2023 W.andrea talk contribs 53,332 bytes −170 →C# examples: Remove duplicate references, use {{rp}} instead. undo
• curprev 07:4307:43, 29 May 2023 Cngzz1 talk contribs m 53,502 bytes +354 Add reference for for C#. undo

30 April 2023

• curprev 13:5713:57, 30 April 2023 MichaelMaggs talk contribs 53,148 bytes +51 Adding local short description: "Programming language concept", overriding Wikidata description "subtyping property of a generic type in a programming language" undo Tag: Shortdesc helper

1 April 2023

• curprev 21:3521:35, 1 April 2023 73.223.72.200 talk 53,097 bytes +141 →Formal definition: Resolve clarification needed by switching to same notation used in body. Also add sentence to explicitly define the notation. undo Tag: nowiki added

22 March 2023

• curprev 20:5920:59, 22 March 2023 Liquidev talk contribs 52,956 bytes −170 Remove poorly worded and misguiding sentence about using `dynamic` in C# to circumvent static typing and work around variance undo Tag: Visual edit: Switched

8 March 2023

• curprev 21:5621:56, 8 March 2023 184.151.246.79 talk 53,126 bytes +1 typo and redundant link undo