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Talk:Align columns: Difference between revisions
→J solution: poll: short or general?
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::--[[User:DanBron|DanBron]] 23:32, 2 December 2008 (UTC)
=== poll: short or general? ===
Given that:
# The <code>9!:27</code> version confused even a veteran J user, and
# using these foreigns has side effects which would need to be reverted after the desired effect is acheived, further cluttering the solution, and
# using foreigns that control global formatting to acheive local formatting might be considered cute at best, and
# the task calls for ''allow[ing] each word in a column to be [aligned]'', which could imply the need to align words or columns independently, then
should we scrap our short (if cute) solution, and replace it with a longer, but more general solution? As a (possibly desirable) side-effect, a solution which eschewed the foreigns would be more comparable to others written in languages which lack a built-in formatting & alignment facility.
If so, here's a candidate solution:
colAlign =: 'L'&$: : (format@:align parse)
format =: [: > (,. ' '&,.)&.>/
align =: cols |."1&.>~ ('';1) <;.1 rotation
cols =: <@:>"1@:|:@:]
rotation =: (<.@*"1 2: %~ 'LCR'&i.)~ offset
offset =: (-"1 >./)@:(#&>)
parse =: [: (-@:(-:{:) }. <;._2@:,~)&>/ '$'; LF ; ]
Example of use:
colAlign text NB. Default is left justification.
'C' colAlign text NB. Can specify a different justification for all columns,
'RCLRCLRCLRCL' colAlign text NB. or for each column independently,
(6 12 (] {~ (?.@$ #)) 'LCR') colAlign text NB. or for each word independently.
Of course, we could retain both, and lead with the short one. But that might be overkill.
--[[User:DanBron|DanBron]] 02:39, 3 December 2008 (UTC)
== Output Question ==
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