Introduce `--sort`: Sort by Header

[Dentrax]

Check list

• I have read through the README
• I have searched through the existing issues

Environment info

• OS
  • Linux
  • Mac OS X
  • Windows
  • Others:

Version

csview 1.2.2

Problem / Steps to reproduce

Thanks for such an awesome project! This is rock! 🔥

It would be nice to have a (--sort|--sort-by|--sort-asc|--sort-dsc) flag to sort items by providing header name: (I'm not sure about the flag namings)

"h1", "h2", "h3"
"ccc", "bbb", "aaa"
"bbb", "ccc", "bbb"
"aaa", "aaa", "ccc"

For example:

• csview --sort-asc h1:

"h1", "h2", "h3"
"aaa", "aaa", "ccc"
"bbb", "ccc", "bbb"
"ccc", "bbb", "aaa"

• csview --sort-dsc h2:

"h1", "h2", "h3"
"bbb", "ccc", "bbb"
"ccc", "bbb", "aaa"
"aaa", "aaa", "ccc"

WDYT?

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[Dentrax]

/remove-lifecycle stale

[wfxr]

Hi @Dentrax, sorry for the late reply, and thanks for your suggestion. csview aims to be a pure, fast csv pager for cli. Data processing capabilities, such as filter, map, sort, aggregate, etc., can be well provided by tools such as xsv (suggest you take a look at this tool if you often need to deal with csv data). You can easily combine it with csview through pipes, which should be more in line with the unix style IMO:

$ cat a.csv
h1,h2,h3
ccc,bbb,aaa
bbb,ccc,bbb
aaa,aaa,ccc

$ cat a.csv | xsv sort -s h1
h1,h2,h3
aaa,aaa,ccc
bbb,ccc,bbb
ccc,bbb,aaa

$ cat a.csv | xsv sort -s h1 | csview
┌─────┬─────┬─────┐
│ h1  │ h2  │ h3  │
├─────┼─────┼─────┤
│ aaa │ aaa │ ccc │
│ bbb │ ccc │ bbb │
│ ccc │ bbb │ aaa │
└─────┴─────┴─────┘

$ cat a.csv | xsv sort -s h1 --reverse | xsv select h1,h3 | csview --number
┌───┬─────┬─────┐
│ # │ h1  │ h3  │
├───┼─────┼─────┤
│ 1 │ ccc │ aaa │
│ 2 │ bbb │ bbb │
│ 3 │ aaa │ ccc │
└───┴─────┴─────┘