luau-lang/luau
1
0
Fork 0
mirror of https://github.com/luau-lang/luau.git synced 2025-05-04 10:33:46 +01:00
Code Issues Projects Releases Packages Wiki Activity

Update function-table-clone.md

Browse source
This commit is contained in:
Arseny Kapoulkine 2022-02-14 10:25:45 -08:00 • committed by GitHub
parent bfeb69988a
commit d6d65940db
Signed by: DevComp
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 4 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
rfcs/function-table-clone.md
View file

@ -2,15 +2,15 @@
## Summary
Add `table.clone` that, given a table, produces a copy of that table with the same keys/values/metatable.
Add `table.clone` function that, given a table, produces a copy of that table with the same keys/values/metatable.
## Motivation
There are multiple cases today when cloning tables is a useful operation.
When working with tables as data containers, some algorithms may require modifying the table that can't be done in place for some reason.
When working with tables as objects, it can be useful to obtain an identical copy of the object for further modification, preserving the metatable.
When working with immutable data structures, any modification needs to clone some parts of the data structure to produce a new version of the object.
- When working with tables as data containers, some algorithms may require modifying the table that can't be done in place for some reason.
- When working with tables as objects, it can be useful to obtain an identical copy of the object for further modification, preserving the metatable.
- When working with immutable data structures, any modification needs to clone some parts of the data structure to produce a new version of the object.
While it's possible to implement this function in user code today, it's impossible to implement it with maximum efficiency; furthermore, cloning is a reasonably fundamental
operation so from the ergonomics perspective it can be expected to be provided by the standard library.