BurntSushi/xsv

Select columns based on regex

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#155 opened on Oct 28, 2018

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 (4 comments) (0 reactions) (0 assignees)Rust (315 forks)batch import
enhancementhelp wanted

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Description

I have a pretty unwieldy CSV file with a ton of columns (~300000) all with quite long column names. I'd really like to be able to select the columns using a regex rather than having to attempt to figure out a set of ranges from the header. Is this a feature you think would fit in xsv?

I'm not sure exactly what the input would look like; perhaps an additional flag to indicate that the selection(s) are regexes?

Thanks so much for all your work, by the way! :smiley:

Edit: forgot to say, I'd be happy to have a go at implementing this!

Contributor guide

Research direction
Examine the existing column selection code (e.g., sel function) and propose a new flag regex that accepts a regex pattern. Then modify the selection logic to use regex matching on column names.
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.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
RustCSV
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60