RegEx Replace Factoids

[brigand]

These would be semi-dynamic factoids. A simple example:

<USER> !learn s/lodash (\w+)/_.\1 http://devdocs.io/lodash/index#\1
<USER> !lodash throttle
<bot>  USER: _.throttle http://devdocs.io/lodash/index#throttle
<USER> !lodash map
<bot>  USER: _.map http://devdocs.io/lodash/index#map

If someone gives me the go-ahead, I'll implement it.

Pattern must start with three or more non-dynamic characters followed by a space, e.g. "lodash ". This'll be used to speed up look-up time, by not executing the expression until a match is likely

[ljharb]

Non-perfect-matching factoids already show all matching factoids - wouldn't this risk reducing a near-infinite namespace to existing keys plus a few cleverly crafter regexes?

[brigand]

Okay, here's an alternate suggestion with that in mind.

<USER> !!learn lodash {{0}} = _.{{0}} http://devdocs.io/lodash/index#{{0}}
<USER> !! lodash throttle
<bot>  USER: _.throttle http://devdocs.io/lodash/index#throttle
<USER> !! lodash map
<bot>  USER: _.map http://devdocs.io/lodash/index#map
<USER> !lodash
<bot>  USER: the default lodash factoid or the usual help prompt

Up to {{2}} may be used (not sure if that's even needed); it's restricted to a new !! namespace (which could still technically collide with !learn ! foo = something, but good enough).

@ljharb, still don't like it, or are there any outstanding problems with this?

[ljharb]

Certainly if you're making a new namespace, there's no collision issue. My next question is, what use case is this solving? I can already do !g lodash throttle which links me to the docs, for example.