"regroup" filter

[shacker]

Django includes an especially useful template filter called "regroup" that lets you sort and re-organize a hash/dictionary data set by inner criteria ("Regroups a list of alike objects by a common attribute.") regroup is best explained by looking at the example + docs:

https://docs.djangoproject.com/en/dev/ref/templates/builtins/#regroup

Feature request: It would be fantastic to see a similar capability built into Angular.

[marknadig]

+1 would be great

[IgorMinar]

-1

This functionality is much better suited for a utility library like underscore or lowdash. I'd like to keep the focus on adding functionality that can't be added by a lightweight library.

[shacker]

Framework maintainers always debate what does and what doesn't deserve to be in core. I'd argue that this deserves to be in core because one shouldn't have to add in another library or go through data manipulation contortions to solve common problems. What makes frameworks attractive is that they do the heavy lifting for us in frequently occurring scenarios. Making hard tasks easy is what makes frameworks attractive. Just IMO.

[btford]

Also -1; this isn't hard to implement yourself (or via underscore) if needed, and I don't think it's that common that even the majority of apps need it. If you include this, there are a bunch of other arbitrary transforms that you'd also be tempted to include in Angular.

What makes frameworks attractive is that they do the heavy lifting for us in frequently occurring scenarios. Making hard tasks easy is what makes frameworks attractive. Just IMO.

Certainly. But client-side libraries need to balance features with payload size. I think this is one case best left outside the framework (or to a separate library). But I certainly understand the need for something like this. @shacker, it might be worthwhile to write an AngularJS wrapper for underscore, or this particular filter at least, and put it up on Github.

[gonzaloruizdevilla]

@btford It has been done already by @floydsoft: https://github.com/floydsoft/angular-underscore
I suppose you can use this with both underscore and lodash

[marknadig]

@gonzaloruizdevilla thanks for the link! Suggest we just close this issue.

[shacker]

OK to close the issue, but I'd still love to see an example of how the goal of this ticket would be accomplished with Underscore. I'm looking at the Underscore docs and it's not quite apparent (to me) how I would accomplish this. The idea of course is to be able to do things like this quickly and easily.

[petebacondarwin]

The groupBy() function is what you need: http://underscorejs.org/#groupBy...