#ruby on 2025-02-12 — irc logs at libera.irclog.whitequark.org

2025-01-15 09:40 havenwood changed the topic of #ruby to: Ruby 3.4.1, 3.3.7 https://www.ruby-lang.org | Log https://libera.irclog.whitequark.org/ruby

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05:48 <mange> Is there a convenient way to use case/in to pattern match on a regexp, while extracting capture groups? I want to match one string against multiple regexps, and take the first one that matches. I know I can use $1, $2, etc, but I'm hoping for something more like `case "abc"; in /(.)b(.)/ => [m1, m2]; pp [:m1, m1, :m2, m2]; end` (which doesn't work, as far as I can tell).

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08:20 <henk> hypernormalisation is a great term I recently learned about

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20:35 <havenwood> mange: You can check if #deconstruct and #deconstruct_keys are defined to see if an Object supports pattern matching. Unfortunately, Regexp pattern matching is suspect with the global `$~` as the only way I can think of to get at a match. It's not implemented by default.

20:37 <havenwood> Or preferably, Regexp.last_match, but same issue of it being global.

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21:21 <Guest49> Hello

21:22 <Guest49> Can we discuss issues here? I need a bit of help

21:23 <Guest49> I have this code:

21:23 <Guest49> stats_id = req.path_info.split('/').last

21:23 <Guest49> sql = "SELECT * FROM stats WHERE id = (?)"

21:23 <Guest49> result = DB.execute(sql, [stats_id])

21:23 <Guest49> puts result.first

21:23 <Guest49> It fails, no result is returned

21:24 <Guest49> But if I do :

21:24 <Guest49> stats_id = "5d651baa"

21:24 <Guest49> sql = "SELECT * FROM stats WHERE id = (?)"

21:24 <Guest49> result = DB.execute(sql, [stats_id])

21:24 <Guest49> puts result.first

21:24 <Guest49> It works

21:25 <Guest49> A puts stats_id tell me the string obtained from the split is 5d651baa

21:25 <Guest49> I'm lost

21:39 <adam12> Guest49: Is `DB` a Sequel connection?

21:40 <Guest49> adam12 DB is `SQLite3::Database`

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21:41 <adam12> Guest49: I don't see why your code wouldn't work.

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21:42 <Guest49> Me neither...

21:42 <Guest49> I'm doing the dirty

21:42 <Guest49> ``` stats_id = req.path_info.split('/').last.gsub(/[^a-z0-9]/, '')

21:42 <Guest49> sql = "SELECT * FROM stats WHERE id = '#{stats_id}'"

21:42 <Guest49> result = DB.execute(sql)```

21:42 <Guest49> for now, but...

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21:46 <adam12> That's working??

21:46 <Guest49> Yes

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21:47 <Guest49> "Variable inclusion" in the sql string works

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22:25 <weaksauc_> probably have some kind of whitespace issue in the first one or some extra thing that doesn't get shown in a puts. p would show it

22:27 <sphex> weaksauc_: could be an encoding issue. the SQLite module treats US-ASCII strins as SQL blobs and they're not equal to SQL strings.

22:27 <weaksauc_> true as well

22:29 <sphex> I think I had that exact same problem using a string from the rack env with sqlite. I just ended up using "#{var}" to give it the ruby script's encoding.

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22:43 <sphex> ASCII-8BIT I mean, not US-ASCII. And seems like puma and webrick don't use the same encodings by default for the strings in the rack env...

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