Re: [Haskell-cafe] Library support for sorting with Text.Data.ICU.Collate.MCollator?

On Mon, Sep 19, 2011 at 04:29:03PM +0300, Michael Snoyman wrote:

On Mon, Sep 19, 2011 at 4:26 PM, Richard Cobbe wrote:

...

I'm trying to sort a list of Text values using a collator obtained from the Text.Data.ICU.Collate module in the text-icu package on Hackage. Unfortunately, I can't use the normal Data.List.sortBy function with one of these collators, because the collators return (IO Ordering), not Ordering.

It's easy to write sortWithCollator :: [Text] -> IO [Text], but I'd rather not have to.  I haven't been able to find library support for this anywhere -- am I overlooking it, or do I need to write the sort function myself?

Hi Richard,

You want to use freeze[1] to get an immutable collator, and then use the pure collate[2] function.

Ah -- perfect. Can't think how I missed freeze. Thanks! Richard