BurntSushi/xsv

exclude command idea

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#61 opened on Mar 9, 2017

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 (14 comments) (1 reaction) (0 assignees)Rust (9,730 stars) (315 forks)batch import
enhancementhelp wanted

Description

I think it would be handy to have a command to exclude matching columns from 2 csvs and print the remainder. For example:

source.csv:

id,boolean
1,yes
2,no
3,yes

exclusions.csv:

id,boolean
2,yes
4,no

syntax could be similar to join: xsv exclude <columns1> <input1> <columns2> <input2>, so

$ xsv exclude id exclusions.csv id source.csv
id,boolean
1,yes
3,yes

Contributor guide

Tech stack
rust
Domain
cli
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Rust programmingCSV data manipulationxsv architecture
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60
Research direction
Study the existing xsv command implementations, especially the `join` command for structure. Review the comments in issue #61 for design considerations. Implement a new `exclude` subcommand following the code patterns in src/cmd/. Ensure to add unit tests and update the help text.