Thread (13 messages) 13 messages, 5 authors, 2018-09-08

Re: ordered string-list considered harmful, was Re: [PATCH v3] Allow aliases that include other aliases

From: Jeff King <hidden>
Date: 2018-09-06 19:20:25

On Thu, Sep 06, 2018 at 03:12:03PM -0400, Jeff King wrote:
On Thu, Sep 06, 2018 at 10:59:42AM -0400, Jeff King wrote:
quoted
quoted
+		string_list_append(&cmd_list, *argv[0]);
This will create an unsorted list. You'd have to use
string_list_insert() here for a sorted list, or
unsorted_string_list_has_string() in the earlier call.

It's unfortunate that string_list makes this so easy to get wrong.
This is getting really off-topic (since it sounds like we'd probably
want to use an ordered list here), but is it crazy to think that
basically every use of an ordered string list could just be a hashmap?
Er, oops, I used "ordered" to mean two things here.

I meant that the code regarding aliases would use an _unsorted_ list
(where we care about keeping the original insertion order).

But what I think is harmful is a _sorted_ list, because of the
"accidentally quadratic" nature, and because it's easy to call its
functions on an unsorted list.

-Peff
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