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# Description This adds `polars join_where` which allows joining two dataframes based on a conditions. The command can be used as: ``` ➜ let df_a = [[name cash];[Alice 5] [Bob 10]] | polars into-lazy ➜ let df_b = [[item price];[A 3] [B 7] [C 12]] | polars into-lazy ➜ $df_a | polars join_where $df_b ((polars col cash) > (polars col price)) | polars collect ╭───┬───────┬──────┬──────┬───────╮ │ # │ name │ cash │ item │ price │ ├───┼───────┼──────┼──────┼───────┤ │ 0 │ Bob │ 10 │ B │ 7 │ │ 1 │ Bob │ 10 │ A │ 3 │ │ 2 │ Alice │ 5 │ A │ 3 │ ╰───┴───────┴──────┴──────┴───────╯ ``` # User-Facing Changes - new command `polars join_where`
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.