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# Description Fixes: #13105 Fixes: #13077 This pr makes `str substring`, `bytes at` work better with negative index. And it also fixes the false range semantic on `detect columns -c` in some cases. # User-Facing Changes For `str substring`, `bytes at`, it will no-longer return an error if start index is larger than end index. It makes sense to return an empty string of empty bytes directly. ### Before ```nushell # str substring ❯ ("aaa" | str substring 2..-3) == "" Error: nu:🐚:type_mismatch × Type mismatch. ╭─[entry #23:1:10] 1 │ ("aaa" | str substring 2..-3) == "" · ──────┬────── · ╰── End must be greater than or equal to Start 2 │ true ╰──── # bytes at ❯ ("aaa" | encode utf-8 | bytes at 2..-3) == ("" | encode utf-8) Error: nu:🐚:type_mismatch × Type mismatch. ╭─[entry #27:1:25] 1 │ ("aaa" | encode utf-8 | bytes at 2..-3) == ("" | encode utf-8) · ────┬─── · ╰── End must be greater than or equal to Start ╰──── ``` ### After ```nushell # str substring ❯ ("aaa" | str substring 2..-3) == "" true # bytes at ❯ ("aaa" | encode utf-8 | bytes at 2..-3) == ("" | encode utf-8) true ``` # Tests + Formatting Added some tests, adjust existing tests
Nushell core libraries and plugins
These sub-crates form both the foundation for Nu and a set of plugins which extend Nu with additional functionality.
Foundational libraries are split into two kinds of crates:
- Core crates - those crates that work together to build the Nushell language engine
- Support crates - a set of crates that support the engine with additional features like JSON support, ANSI support, and more.
Plugins are likewise also split into two types:
- Core plugins - plugins that provide part of the default experience of Nu, including access to the system properties, processes, and web-connectivity features.
- Extra plugins - these plugins run a wide range of different capabilities like working with different file types, charting, viewing binary data, and more.