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GNU Bash vs Nu Shell: What are the differences?
Introduction
In this Markdown code, I will provide a comparison of the key differences between GNU Bash and Nu Shell.
Execution Model: GNU Bash follows an imperative execution model where the user provides a series of commands to be executed in a sequential manner. On the other hand, Nu Shell follows a data-oriented execution model where data flows through pipelines and commands are applied to the data as it passes through.
Data Structures: GNU Bash primarily operates on strings, making it suitable for text processing tasks. However, Nu Shell introduces structured data as first-class citizens, allowing users to manipulate and transform data using tables, records, and columns.
Command Syntax: GNU Bash follows a traditional Unix shell syntax with a combination of commands, flags, and arguments. Nu Shell opts for a more modern and user-friendly command syntax, with clearer subcommand names and the ability to chain commands using the pipe operator (|).
Extensibility: GNU Bash offers extensibility through shell scripts, where users can write custom scripts to automate tasks. Nu Shell takes a different approach by providing a plugin system, allowing users to extend the functionality of the shell with additional commands and data processing operations.
Error Handling: GNU Bash handles errors in a straightforward manner, where a failed command in a script will stop the execution. In contrast, Nu Shell follows a more resilient approach by continuing with the execution even if a command fails, providing users with more flexibility in handling errors within scripts.
Parallel Execution: GNU Bash does not inherently support parallel execution of commands. Nu Shell, on the other hand, provides built-in support for parallel execution, allowing users to leverage multiple cores and CPUs to run commands concurrently, resulting in improved performance for computationally intensive tasks.
In summary, GNU Bash and Nu Shell differ in their execution model, data structures, command syntax, extensibility, error handling, and support for parallel execution. These differences make Nu Shell a more modern and powerful shell for data manipulation and processing tasks.
If you have a file (demo.txt) that has 3 columns:
Column-1 Column-2 Column-3
Row-1a Row-2a Row-3a
Row-1b Row-2b Row-3b
Row-1c Row-2c Row-3c
Row-1d Row-2d Row-3d
Row-1e Row-2e Row-3e
and you want to only view the first column of the file in your CLI, run the following:
awk {'print $1'} demo.txt
Column-1
Row-1a
Row-1b
Row-1c
Row-1d
Row-1e
If you want to print the second column of demo.txt, just replace $1 with $2
Pros of GNU Bash
- Customizable3
- Powerful scripting language3
- Widely adopted2
- Cross platform0
Pros of Nu Shell
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Cons of GNU Bash
- Too Slow1
